首页|Synergism of preintercalated manganese ions and lattice water in vanadium oxide cathodes for high-capacity and long-life Zn-ion batteries

Synergism of preintercalated manganese ions and lattice water in vanadium oxide cathodes for high-capacity and long-life Zn-ion batteries

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Aqueous Zn-ion batteries(AZIBs)are recognized as a promising energy storage system with intrinsic safety and low cost,but its applications still rely on the design of high-capacity and stable-cycling cath-ode materials.In this work,we present an intercalation mechanism-based cathode materials for AZIB,i.e.the vanadium oxide with pre-intercalated manganese ions and lattice water(noted as MVOH).The syn-ergistic effect between Mn2+and lattice H2O not only expands the interlayer spacing,but also signifi-cantly enhances the structural stability.Systematic in-situ and ex-situ characterizations clarify the Zn2+/H+co-(de)intercalation mechanism of MVOH in aqueous electrolyte.The demonstrated remarkable structure stability,excellent kinetic behaviors and ion-storage mechanism together enable the MVOH to demonstrate satisfactory specific capacity of 450 mA h g-1 at 0.2 A g-1,excellent rate performance of 288.8 mA h g1 at 10 A g-1 and long cycle life over 20,000 cycles at 5 A g-1.This work provides a practical cathode material,and contributes to the understanding of the ion-intercalation mechanism and struc-tural evolution of the vanadium-based cathode for AZIBs.

Zn-ion batteriesVanadium oxidePre-intercalationLattice waterManganese ion

Mengjing Wu、Rongrong Li、Kai Yang、Lijiang Yin、Weikang Hu、Xiong Pu

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Key Laboratory of the Ministry of Education for Advanced Catalysis Material,Institute of Physical Chemistry,College of Chemistry and Materials Science,Zhejiang Normal University,Jinhua 321004,Zhejiang,China

CAS Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China

School of Nanoscience and Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

Chilwee Power Co.Ltd.,Changxing 313100,Zhejiang,China

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Chinese Academy of SciencesNational Natural Science Foundation of ChinaNational Key R & D Project from the Ministry of Science and TechnologyFundamental Research Funds for the Central Universities

124GJHZ2023031 MI521732742021YFA1201603

2024

10.1016/j.jechem.2024.04.052

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.96(9)