Mg-doped layered oxide cathode for Na-ion batteries

作     者：丁月君 丁飞翔 容晓晖 陆雅翔 胡勇胜 Yuejun Ding;Feixiang Ding;Xiaohui Rong;Yaxiang Lu;Yong-Sheng Hu

作者机构：Key Laboratory for Renewable EnergyBeijing Key Laboratory for New Energy Materials and DevicesBeijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第6期

页      面：125-131页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51725206,52122214,and 52072403) the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA21070500) Youth Innovation Promotion Association of the Chinese Academy of Sciences(Grant No.2020006) Beijing Municipal Natural Science Foundation,China(Grant No.2212022)。 

主　　题：copper redox layered oxide cathode Na-ion batteries energy storage 

摘      要：Na-ion batteries(NIBs)are regarding as the optimum complement for Li-ion batteries along with the rapid development of stationary energy storage systems.In order to meet the commercial demands of cathodes for NIBs,O3-type Cu containing layered oxide Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))with good comprehensive performance and low-cost element components is very promising for the practical use.However,only part of the Cu^(3+)/Cu^(2+)redox couple participated in the redox reaction,thus impairing the specific capacity of the cathode materials.Herein,Mg2+-doped O3-Na0.90Mg0.08Cu0.22Fe0.30Mn0.40O_(2)layered oxide without Mn3+was synthesized successfully,which exhibited improved reversible specific capacity of 118 mAh/g in the voltage range of 2.4-4.0 V at 0.2 C,corresponding to the intercalation/deintercalation of 0.47 Na+(0.1 more than that of Na_(0.9)0Cu_(0.22)Fe_(0.30)Mn_(0.48O_(2))).This work demonstrates an important strategy to obtain advanced layered oxide cathodes for NIBs.