Electrolytic Zn-MnO2batteries arepromising candidates for safe and sustainable energystorage owing to their high voltage,environmentalbenignity,and cost-effectiveness.However,practicalapplications are hindered by t...Electrolytic Zn-MnO2batteries arepromising candidates for safe and sustainable energystorage owing to their high voltage,environmentalbenignity,and cost-effectiveness.However,practicalapplications are hindered by the poor conductivity andthe irreversible dissolution of conventionalε-MnO2deposits.Herein,we report a scalable semisolid slurryelectrode architecture that enables stable MnO2deposition/dissolution using a three-dimensional percolatingnetwork of carbon nanotubes(CNTs)as both conductivematrix and deposition host.The slurry systempromotes the formation of highly conductiveγ-MnO2owing to enhanced charge transfer kinetics,enablingoverall dissolution rather than the localized separationtypically seen in traditional electrodes.The Zn-MnO2slurry cell exhibits a reversible areal capacity approaching 60 mAh cm-2.Moreover,theflowable nature of the slurry allows electrochemically inactive MnO2formed during dissolution to be reconnected and reactivated by CNTs inthe rheological network,ensuring deep utilization and cycling stability.This work establishes a slurry electrode strategy to improve electrolyticMnO2reactions and offers a viable pathway toward renewable aqueous batteries for grid-scale applications.展开更多
Promoting activity while inhibiting hazardous byproduct formation remains a great challenge in oxygenated volatile organic compounds(OVOCs)purification.Here,we found that the low-temperature oxidation of ethyl acetate...Promoting activity while inhibiting hazardous byproduct formation remains a great challenge in oxygenated volatile organic compounds(OVOCs)purification.Here,we found that the low-temperature oxidation of ethyl acetate(EA)and the generation rate of CO2 were enhanced by controlling the initial Ag precursor(ions vs.nanoparticles)to engineer catalysts with distinct active site configurations.The reaction rate and TOFAg of Ag nanoparticles/310MnO2(Ag-NP/310MnO2)are 4.3 and 4.1 times higher,respectively,than those of Ag ions/310MnO2(Ag-IS/310MnO2)at 150℃.And Ag-NP/310MnO2 further shows a 1.9-fold higher CO2 selectivity compared to that of Ag-IS/310MnO2.The adsorption ability of EA is much stronger than that of O2 at Ag site,while the opposite trend is observed at oxygen vacancy.The synergy between Ag site(EA adsorption)and oxygen vacancy(O2 dissociation)in Ag-NP/310MnO2 accelerates O2 activation and subsequent EA oxidation.Moreover,abundant active oxygen species(*O)promote the rate-limiting step of acetic acid decomposition,contributing to superior low-temperature CO2 selectivity.However,due to the fierce competition from EA,limited O2 is adsorbed at Ag site-occupied oxygen vacancy,which is difficult to dissociate especially at low temperature,leading to inferior activity of Ag-IS/310MnO2.This work provides a vital scientific basis for enhancing the low-temperature deep oxidation of OVOCs,showcasing remarkable environmental significance.展开更多
Limited by secondary pollution of PMS and active species generation capacity,the development of photocatalytic PMS activation systems should focus on the improvement of PMS utilization efficiency.In this manuscript,S-...Limited by secondary pollution of PMS and active species generation capacity,the development of photocatalytic PMS activation systems should focus on the improvement of PMS utilization efficiency.In this manuscript,S-scheme MnO2/BiOCl heterojunction were constructed for various antibiotics and endocrine disruptors removal by photocatalytic peroxymonosulfate(PMS)activation.Under visible light and the low PMS concentration(0.08 mmol·L–1),the doxycycline hydrochloride(DXC)and bisphenol A oxidation performance of MnO2/BiOCl-2 composites have enhanced 16.3%and 67.2%compared with that of BiOCl materials.The photocatalytic PMS utilization efficiency of MOBC-2 composites reaches to 95.5%,wherein that of BiOCl materials is 36.1%.The PMS adsorption energy of MnO2/BiOCl composites by the density functional thoery calculation possess exceptional PMS activation ability ascribed to the coupling with MnO2.Furthermore,the calculation of electron spin-charge density and Gibbs free energy change demonstrates MnO2/BiOCl composites can react with PMS for1O2formation.The liquid chromatography-tandem mass spectrometry measurement and Fukui function has been employed for inferring the intermediates of DXC in PMS oxidation process.This manuscript provides research insights and scientific references for construction of S-scheme heterojunction to employ in visible-light-driven low-concentration PMS activation process.展开更多
The application of conventional manganese dioxide(MnO2)materials in sodium-ion supercapacitors(Na-SCs)is considerably limited by their low conductivity and structural instability.Biomimetic morphology engineering c...The application of conventional manganese dioxide(MnO2)materials in sodium-ion supercapacitors(Na-SCs)is considerably limited by their low conductivity and structural instability.Biomimetic morphology engineering can optimize the electrochemical performance of MnO2.Here,based on the metal-organic frameworks(MOFs)-derived method and electrochemical reconstruction,a coral-like MnO2structure integrated with a functional nitrogen-doped carbon(NC)coating is designed for Na-SC application.The bioinspired coral-like structure captures numerous electrolyte ions and increases the Na+concentration on the electrode surface,which is beneficial for optimizing the Na+transport pathway and accelerating the electrode reaction kinetics.Moreover,the coral-like crosslinked structure effectively enhances the mechanical properties,enabling the maintenance of the structure of MnO2-based electrodes during long-term operation.Furthermore,in/ex-situ characterizations are performed to elucidate the mechanism of lattice transformation during electrochemical phase reconstruction.Additionally,the theoretical calculation and simulation results reveal the ion/electron dynamics in the fabricated electrode.The prepared electrode demonstrates excellent capacitance storage ability(340.7 F g−1at 0.5 A g−1)and cycling stability(85.1%capacitance retention after 10,000 cycles).The assembled hybrid device exhibits exceptional life-span(82.0%capacitance retention after 10,000 cycles)and exceptional energy density(36.5 Wh kg−1).This study provides a reliable biomimetic morphology design strategy for MnO2cathodes,paving the way for the fabrication of high-performance Na-SCs.展开更多
The synergistic interaction between carbon materials and metals has been widely utilized in industrial selective hydrocarbon oxidation.In this study,a pronounced synergistic effect between g-C3N4-M and MnO2 n...The synergistic interaction between carbon materials and metals has been widely utilized in industrial selective hydrocarbon oxidation.In this study,a pronounced synergistic effect between g-C3N4-M and MnO2 nanoparticles was observed,which significantly promoted the oxidation of cumene,facilitated the decomposition of cumene hydroperoxide(CHP),and enhanced the selectivity toward 2-phenyl-2-propanol(PP).Specifically,the 30-MnO2/g-C3N4-M catalyst achieved a cumene conversion of 73.83%with a PP selectivity of 69.61%,representing the most efficient performance among all investigated catalysts.The structural characteristics of the synthesized catalysts were systematically analyzed by SEM,TEM,XRD,FTIR,and XPS.Furthermore,gas chromatography confirmed PP as the predominant reaction product.Mechanistic investigations revealed that the decomposition of CHP constitutes a crucial step in the cumene oxidation process.The facile synthesis and low cost of g-C3N4-M catalysts offer significant advantages for industrial-scale aromatic hydrocarbon oxidation.展开更多
生物浸出是实现攀西地区低品位硫钴资源综合回收的有效途径,但存在钴浸出率低、浸出周期长等缺点,亟需寻求高效的强化手段。MnO2具有良好的导电性与强氧化性,在浸出过程强化方面具有明显优势。本文系统研究了MnO2对A.ferrooxidan...生物浸出是实现攀西地区低品位硫钴资源综合回收的有效途径,但存在钴浸出率低、浸出周期长等缺点,亟需寻求高效的强化手段。MnO2具有良好的导电性与强氧化性,在浸出过程强化方面具有明显优势。本文系统研究了MnO2对A.ferrooxidans浸出硫钴精矿过程的影响及其作用机理。结果表明:在未调节pH值条件下,MnO2的添加抑制微生物生长;通过动态调控pH值至2.0可有效缓解抑制作用,细菌浓度最高达1.41×109mL−1,添加1 g和2 g MnO2时钴浸出率分别达到69.25%和64.04%,高于无MnO2添加组的52.95%。适量MnO2的添加与pH调控可实现原电池−微生物强化钴的浸出。生物浸出过程中的固态产物主要是黄钾铁矾;MnO2强化浸出过程可分为化学氧化主导、化学−微生物共同作用和生物浸出主导三个阶段。展开更多
Lung cancer is one of the most common and deadly malignancies worldwide.Although immune checkpoint inhibitors,including PD‐1/PD‐L1 blockers,have benefited a subset of patients,response rates remain limited,and recur...Lung cancer is one of the most common and deadly malignancies worldwide.Although immune checkpoint inhibitors,including PD‐1/PD‐L1 blockers,have benefited a subset of patients,response rates remain limited,and recurrence is frequent because of the immunosuppressive tumor microenvironment(TME),characterized by hypoxia and dysregulated reactive oxygen species(ROS).Here,we develop ultrathin MnO2‐PEG‐PD‐L1 nanosheets that integrate TME regulation and PD‐L1‐targeted delivery for 1064 nm NIR‐II photothermal‐enhanced immunotherapy of lung cancer.MnO2‐PEG‐PD‐L1 exhibits efficient photothermal conversion and controlled degradation in acidic,H2O2‐rich conditions,scavenging H2O2,alleviating hypoxia,and downregulating the HIF‐1α/adenosine axis to relieve A2AR‐associated immunosuppression.In vitro,PD‐L1 modification enhances uptake by LLC cells,and MnO2‐PEG‐PD‐L1 plus photothermal treatment induces hallmark immunogenic cell death,including HMGB1 release,CRT exposure,ATP secretion,and maturation of bone marrow‐derived dendritic cells in coculture.In a murine LLC tumor model,MnO2‐PEG‐PD‐L1 with NIR‐II irradiation markedly suppresses tumor growth,reduces Ki67‐positive cells,achieves a high tumor inhibition rate,and prolongs survival without significant body‐weight loss.Immune analyses show that this treatment remodels the TME by decreasing neutrophils,Th17 cells,and pro‐inflammatory cytokines.In a postoperative recurrence model,MnO2‐PEG‐PD‐L1 combined with photothermal therapy effectively delays recurrent tumor growth and improves postoperative survival,indicating durable T cell‐mediated antitumor responses and long‐term control of recurrence.This nanosheet platform offers a promising strategy for integrated TME modulation and NIR‐II photothermal immunotherapy against refractory lung cancer.展开更多
MnO2 emerges as a promising cathode material for aqueous zinc-ion batteries(AZIBs)due to its high theoretical capacity and ideal working voltage.However,inherent limitations in low electrical conductivity and struc...MnO2 emerges as a promising cathode material for aqueous zinc-ion batteries(AZIBs)due to its high theoretical capacity and ideal working voltage.However,inherent limitations in low electrical conductivity and structural instability restrict its widespread application.Herein,we fabricated layered δ-MnO2 and introduced Cu and Ce metal ions for structural regulation,thus constructing a δ/a-MnO2 heterostructure within the δ-MnO2 matrix,forming a heterointerface that simultaneously enhances the electrical conductivity and structural stability of the material.In this system,Cu2+acts as a catalyst,promoting the reduction of high-valent Mn to Mn2+and enabling local two-electron transfer,which significantly increases the discharge specific capacity of MnO2.For Ce3+,it functions as a structural regulator,inducing the partial transformation of δ-MnO2 to a-MnO2 and forming the δ/a-MnO2 heterostructure.Further supported by density functional theory(DFT)calculations and in-situ characterization results,the heterointerface between a-MnO2 andδ-MnO2 generates an internal electric field due to the difference in Fermi levels.This not only effectively enhances the electron transfer capability but also significantly improves structural stability.Benefiting from these advantages,the Cu,Ce co-incorporated MnO2(CCMO)cathode delivers a high discharge capacity of 455.4 mAh g-1at 0.2 A g-1and maintains 191.2 mAh g-1specific capacity after 1500 cycles with 95%capacity retention at 2 A g-1,which is significantly better than non-doped MnO2.This strategy of structural regulation and heterostructure construction using guest ions offers a new approach for developing high-performance Mn-based cathode materials for AZIBs.展开更多
基金supported by the National Natural Science Foundation of China(No.22109181,U24A2060,22279023,and 22309031)the National Key R&D Program of China(2024YFE0101100)+6 种基金the Hunan Provincial Science and Technology Plan Projects of China(No.2017TP1001)the Hunan Provincial Natural Science Foundation of China(No.2025JJ40011)the Fundamental Research Funds for the Central Universities(20720250005)the Science and Technology Commission of Shanghai Municipality(25DZ3002901,2024ZDSYS02,25PY2600100)the Shanghai Pilot Program for Basic Research-Fudan University 21TQ1400100(25TQ012)the AI for Science Foundation of Fudan University(FudanX24A1035)the National Research Foundation,Singapore,under its Singapore-China Joint Flagship Project(Clean Energy).
摘要Electrolytic Zn-MnO2batteries arepromising candidates for safe and sustainable energystorage owing to their high voltage,environmentalbenignity,and cost-effectiveness.However,practicalapplications are hindered by the poor conductivity andthe irreversible dissolution of conventionalε-MnO2deposits.Herein,we report a scalable semisolid slurryelectrode architecture that enables stable MnO2deposition/dissolution using a three-dimensional percolatingnetwork of carbon nanotubes(CNTs)as both conductivematrix and deposition host.The slurry systempromotes the formation of highly conductiveγ-MnO2owing to enhanced charge transfer kinetics,enablingoverall dissolution rather than the localized separationtypically seen in traditional electrodes.The Zn-MnO2slurry cell exhibits a reversible areal capacity approaching 60 mAh cm-2.Moreover,theflowable nature of the slurry allows electrochemically inactive MnO2formed during dissolution to be reconnected and reactivated by CNTs inthe rheological network,ensuring deep utilization and cycling stability.This work establishes a slurry electrode strategy to improve electrolyticMnO2reactions and offers a viable pathway toward renewable aqueous batteries for grid-scale applications.
摘要Promoting activity while inhibiting hazardous byproduct formation remains a great challenge in oxygenated volatile organic compounds(OVOCs)purification.Here,we found that the low-temperature oxidation of ethyl acetate(EA)and the generation rate of CO2 were enhanced by controlling the initial Ag precursor(ions vs.nanoparticles)to engineer catalysts with distinct active site configurations.The reaction rate and TOFAg of Ag nanoparticles/310MnO2(Ag-NP/310MnO2)are 4.3 and 4.1 times higher,respectively,than those of Ag ions/310MnO2(Ag-IS/310MnO2)at 150℃.And Ag-NP/310MnO2 further shows a 1.9-fold higher CO2 selectivity compared to that of Ag-IS/310MnO2.The adsorption ability of EA is much stronger than that of O2 at Ag site,while the opposite trend is observed at oxygen vacancy.The synergy between Ag site(EA adsorption)and oxygen vacancy(O2 dissociation)in Ag-NP/310MnO2 accelerates O2 activation and subsequent EA oxidation.Moreover,abundant active oxygen species(*O)promote the rate-limiting step of acetic acid decomposition,contributing to superior low-temperature CO2 selectivity.However,due to the fierce competition from EA,limited O2 is adsorbed at Ag site-occupied oxygen vacancy,which is difficult to dissociate especially at low temperature,leading to inferior activity of Ag-IS/310MnO2.This work provides a vital scientific basis for enhancing the low-temperature deep oxidation of OVOCs,showcasing remarkable environmental significance.
摘要Limited by secondary pollution of PMS and active species generation capacity,the development of photocatalytic PMS activation systems should focus on the improvement of PMS utilization efficiency.In this manuscript,S-scheme MnO2/BiOCl heterojunction were constructed for various antibiotics and endocrine disruptors removal by photocatalytic peroxymonosulfate(PMS)activation.Under visible light and the low PMS concentration(0.08 mmol·L–1),the doxycycline hydrochloride(DXC)and bisphenol A oxidation performance of MnO2/BiOCl-2 composites have enhanced 16.3%and 67.2%compared with that of BiOCl materials.The photocatalytic PMS utilization efficiency of MOBC-2 composites reaches to 95.5%,wherein that of BiOCl materials is 36.1%.The PMS adsorption energy of MnO2/BiOCl composites by the density functional thoery calculation possess exceptional PMS activation ability ascribed to the coupling with MnO2.Furthermore,the calculation of electron spin-charge density and Gibbs free energy change demonstrates MnO2/BiOCl composites can react with PMS for1O2formation.The liquid chromatography-tandem mass spectrometry measurement and Fukui function has been employed for inferring the intermediates of DXC in PMS oxidation process.This manuscript provides research insights and scientific references for construction of S-scheme heterojunction to employ in visible-light-driven low-concentration PMS activation process.
基金supported by the National Natural Science Foundation of China(22409065)the Guangdong Basic and Applied Basic Research Foundation(2022A1515011906)+2 种基金the China Postdoctoral Science Foundation(2023M731153)the Research Fund Program of Guangdong Provincial Key Laboratory of Fuel Cell Technologythe Postdoctoral Fellowship Program of CPSF(GZC20230868).
摘要The application of conventional manganese dioxide(MnO2)materials in sodium-ion supercapacitors(Na-SCs)is considerably limited by their low conductivity and structural instability.Biomimetic morphology engineering can optimize the electrochemical performance of MnO2.Here,based on the metal-organic frameworks(MOFs)-derived method and electrochemical reconstruction,a coral-like MnO2structure integrated with a functional nitrogen-doped carbon(NC)coating is designed for Na-SC application.The bioinspired coral-like structure captures numerous electrolyte ions and increases the Na+concentration on the electrode surface,which is beneficial for optimizing the Na+transport pathway and accelerating the electrode reaction kinetics.Moreover,the coral-like crosslinked structure effectively enhances the mechanical properties,enabling the maintenance of the structure of MnO2-based electrodes during long-term operation.Furthermore,in/ex-situ characterizations are performed to elucidate the mechanism of lattice transformation during electrochemical phase reconstruction.Additionally,the theoretical calculation and simulation results reveal the ion/electron dynamics in the fabricated electrode.The prepared electrode demonstrates excellent capacitance storage ability(340.7 F g−1at 0.5 A g−1)and cycling stability(85.1%capacitance retention after 10,000 cycles).The assembled hybrid device exhibits exceptional life-span(82.0%capacitance retention after 10,000 cycles)and exceptional energy density(36.5 Wh kg−1).This study provides a reliable biomimetic morphology design strategy for MnO2cathodes,paving the way for the fabrication of high-performance Na-SCs.
基金Projects(22478001,22108238,22108002,U22A20408)supported by the National Natural Science Foundation of ChinaProject(2408085Y005)supported by the Excellent Young Scholars Program of Natural Science Foundation of Anhui Province,China+3 种基金Project(2024AH030008)supported by the Excellent Youth Scholars Program of Higher Education Institutions of Anhui Province,ChinaProject(JDSX2023014)supported by the Open Fund of Shanghai Jiao Tong University Shaoxing Research Institute,ChinaProject(ZJUCEU2024017)supported by the State Key Laboratory of Clean Energy Utilization,ChinaProject(2023AH010015)supported by the Outstanding Scientific Research and Innovation Team Program of Higher Education Institutions of Anhui Province,China。
摘要The synergistic interaction between carbon materials and metals has been widely utilized in industrial selective hydrocarbon oxidation.In this study,a pronounced synergistic effect between g-C3N4-M and MnO2 nanoparticles was observed,which significantly promoted the oxidation of cumene,facilitated the decomposition of cumene hydroperoxide(CHP),and enhanced the selectivity toward 2-phenyl-2-propanol(PP).Specifically,the 30-MnO2/g-C3N4-M catalyst achieved a cumene conversion of 73.83%with a PP selectivity of 69.61%,representing the most efficient performance among all investigated catalysts.The structural characteristics of the synthesized catalysts were systematically analyzed by SEM,TEM,XRD,FTIR,and XPS.Furthermore,gas chromatography confirmed PP as the predominant reaction product.Mechanistic investigations revealed that the decomposition of CHP constitutes a crucial step in the cumene oxidation process.The facile synthesis and low cost of g-C3N4-M catalysts offer significant advantages for industrial-scale aromatic hydrocarbon oxidation.
摘要生物浸出是实现攀西地区低品位硫钴资源综合回收的有效途径,但存在钴浸出率低、浸出周期长等缺点,亟需寻求高效的强化手段。MnO2具有良好的导电性与强氧化性,在浸出过程强化方面具有明显优势。本文系统研究了MnO2对A.ferrooxidans浸出硫钴精矿过程的影响及其作用机理。结果表明:在未调节pH值条件下,MnO2的添加抑制微生物生长;通过动态调控pH值至2.0可有效缓解抑制作用,细菌浓度最高达1.41×109mL−1,添加1 g和2 g MnO2时钴浸出率分别达到69.25%和64.04%,高于无MnO2添加组的52.95%。适量MnO2的添加与pH调控可实现原电池−微生物强化钴的浸出。生物浸出过程中的固态产物主要是黄钾铁矾;MnO2强化浸出过程可分为化学氧化主导、化学−微生物共同作用和生物浸出主导三个阶段。
基金financially supported by the National Natural Science Foundation of China(Grant Nos.82102882,82403004,and 52001233).
摘要Lung cancer is one of the most common and deadly malignancies worldwide.Although immune checkpoint inhibitors,including PD‐1/PD‐L1 blockers,have benefited a subset of patients,response rates remain limited,and recurrence is frequent because of the immunosuppressive tumor microenvironment(TME),characterized by hypoxia and dysregulated reactive oxygen species(ROS).Here,we develop ultrathin MnO2‐PEG‐PD‐L1 nanosheets that integrate TME regulation and PD‐L1‐targeted delivery for 1064 nm NIR‐II photothermal‐enhanced immunotherapy of lung cancer.MnO2‐PEG‐PD‐L1 exhibits efficient photothermal conversion and controlled degradation in acidic,H2O2‐rich conditions,scavenging H2O2,alleviating hypoxia,and downregulating the HIF‐1α/adenosine axis to relieve A2AR‐associated immunosuppression.In vitro,PD‐L1 modification enhances uptake by LLC cells,and MnO2‐PEG‐PD‐L1 plus photothermal treatment induces hallmark immunogenic cell death,including HMGB1 release,CRT exposure,ATP secretion,and maturation of bone marrow‐derived dendritic cells in coculture.In a murine LLC tumor model,MnO2‐PEG‐PD‐L1 with NIR‐II irradiation markedly suppresses tumor growth,reduces Ki67‐positive cells,achieves a high tumor inhibition rate,and prolongs survival without significant body‐weight loss.Immune analyses show that this treatment remodels the TME by decreasing neutrophils,Th17 cells,and pro‐inflammatory cytokines.In a postoperative recurrence model,MnO2‐PEG‐PD‐L1 combined with photothermal therapy effectively delays recurrent tumor growth and improves postoperative survival,indicating durable T cell‐mediated antitumor responses and long‐term control of recurrence.This nanosheet platform offers a promising strategy for integrated TME modulation and NIR‐II photothermal immunotherapy against refractory lung cancer.
基金supported by the National Natural Science Foundation of China(no.52574348)the Natural Science Foundation of Hebei Province(nos.E2024501010 and B2024501004)+3 种基金the Shijiazhuang Basic Research Project(no.241790667A)the Fundamental Research Funds for the Central Universities(no.N2423013)the National College Students Innovation and Entrepreneurship Training Program(no.202419145017)the Performance Subsidy Fund for Key Laboratory of Dielectric,Electrolyte Functional Material Hebei Province(no.22567627H)。
摘要MnO2 emerges as a promising cathode material for aqueous zinc-ion batteries(AZIBs)due to its high theoretical capacity and ideal working voltage.However,inherent limitations in low electrical conductivity and structural instability restrict its widespread application.Herein,we fabricated layered δ-MnO2 and introduced Cu and Ce metal ions for structural regulation,thus constructing a δ/a-MnO2 heterostructure within the δ-MnO2 matrix,forming a heterointerface that simultaneously enhances the electrical conductivity and structural stability of the material.In this system,Cu2+acts as a catalyst,promoting the reduction of high-valent Mn to Mn2+and enabling local two-electron transfer,which significantly increases the discharge specific capacity of MnO2.For Ce3+,it functions as a structural regulator,inducing the partial transformation of δ-MnO2 to a-MnO2 and forming the δ/a-MnO2 heterostructure.Further supported by density functional theory(DFT)calculations and in-situ characterization results,the heterointerface between a-MnO2 andδ-MnO2 generates an internal electric field due to the difference in Fermi levels.This not only effectively enhances the electron transfer capability but also significantly improves structural stability.Benefiting from these advantages,the Cu,Ce co-incorporated MnO2(CCMO)cathode delivers a high discharge capacity of 455.4 mAh g-1at 0.2 A g-1and maintains 191.2 mAh g-1specific capacity after 1500 cycles with 95%capacity retention at 2 A g-1,which is significantly better than non-doped MnO2.This strategy of structural regulation and heterostructure construction using guest ions offers a new approach for developing high-performance Mn-based cathode materials for AZIBs.