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

作　　者：Mengjing Wu Rongrong Li Kai Yang Lijiang Yin Weikang Hu Xiong Pu 

机构地区：[1]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 [2]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 [3]School of Nanoscience and Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [4]Chilwee Power Co.Ltd.,Changxing 313100,Zhejiang,China

出　　处：《Journal of Energy Chemistry》2024年第9期709-717,共9页能源化学（英文版）

基　　金：supported by the grants from the Chinese Academy of Sciences(124GJHZ2023031MI);the National Natural Science Foundation of China(52173274);the National Key R&D Project from the Ministry of Science and Technology(2021YFA1201603);the Fundamental Research Funds for the Central Universities.

摘　　要：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 cathode 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 synergistic effect between Mn^(2+)and lattice H_(2)O not only expands the interlayer spacing,but also significantly enhances the structural stability.Systematic in-situ and ex-situ characterizations clarify the Zn^(2+)/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 g^(−1)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 structural evolution of the vanadium-based cathode for AZIBs.

关 键 词：Zn-ion batteries Vanadium oxide Pre-intercalation Lattice water Manganese ion 

分 类 号：TM912[电气工程—电力电子与电力传动]