Ultralong Life Symmetric Potassium Ion Batteries Using a Bipolar Cr/Ti Based Layered Material
作者机构：Key Laboratory of Physics and Technology for Advanced BatteriesMinistry of EducationState Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun130012P.R.China
出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)
年 卷 期：2021年第37卷第3期
页 面：739-744页
核心收录：
学科分类：0808[工学-电气工程] 08[工学] 0703[理学-化学]
基 金：This work was supported by the National Natural Science Foundation of China(No.51972142) the Fund from the Department of Science and Technology of Jilin Province,China(Nos.20180101211JC,20190701020GH) the Fundamental Research Fund for the Center Universities of China
主 题：Layered oxide Potassium-ion battery Symmetric electrode Ultralong life
摘 要：Based on low cost and earth abundance potassium resources,potassium-ion batteries have been regarded as the potential candidate for large-scale energy storage applications for renewable energy and smart *** some earlier works have proposed reversible insertion/extraction of K^(+)ions in K cells,their cycle instability is insufficient for the further application of potassium-ion ***,we report a symmetric potassium-ion battery with ultralong life employing a bipolar Cr/Ti based layered oxide,which contains two electrochemically active transition metals with the redox couples of Cr^(4+)/Cr^(3+)and Ti^(4+)/Ti^(3+)working on the cathode and anode side,***,the(de)intercalation process in the structure and the in-situ electrochemical exchange process are investigated by ex-situ *** a result,the symmetric cell based on the obtained K-based bipolar layered material exhibits a reversible capacity of 102 mA·h/g between 0.5 V and 3.5 V at 20 mA/g,an ultralong cycle life of 2000 cycles with a capacity retention of 80%and high rate *** outstanding cycling stability and rate performance endow this work with promising advantages for the future development of the novel energy storage system.
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