湖南工业大学学报2024，Vol.38Issue(1)：78-83,6.DOI:10.3969/j.issn.1673-9833.2024.01.011
水系铵离子电池β-MnO2正极材料的制备及性能研究
Research on Preparation and Performance of β-MnO2 Cathode Material for Aqueous Ammoniumion Battery
摘要
Abstract
Tunnel-type β-MnO2 cathode materials are synthesized by adopting simple hydrothermal method with its application to aqueous ammoniumion batteries,shows excellent electrochemical performance within a voltage window range of 0～1.6 V by using 1 mol/L(NH4)2SO4 aqueous electrolyte.The experimental results show that β-MnO2 cathode materials exhibit a discharge specific capacity of 109.8 mAh/g at a current density of 0.1 A/g.After 140 cycles,its discharge specific capacity still reaches as high as 101.9 mAh/g,with a capacity retention rate of 92.8%and a Coulombic efficiency close to 100%,demonstrating an excellent cycling stability.Meanwhile,β-MnO2 nanorod cathode material is characterized with an excellent rate performance,with a discharge specific capacity of 78.7 mAh/g at a high current density of 1.0 A/g.In addition,an inquiry has been made into the energy storage mechanism based on ex situ FTIR and XPS testing,with the results showing that the ammoniumions exhibiting a good reversibility.关键词
水系铵离子电池/β-MnO2/正极材料/水热法Key words
aqueous ammonium ion battery/β-MnO2/cathode material/hydrothermal method分类
通用工业技术引用本文复制引用
刘扬,陈晗,向凯雄,周伟..水系铵离子电池β-MnO2正极材料的制备及性能研究[J].湖南工业大学学报,2024,38(1):78-83,6.基金项目
中国博士后科学研究基金资助项目(2021M693777) （2021M693777）
湖南省自然科学基金资助项目(2020JJ6079) （2020JJ6079）
