Mg-doped layered oxide cathode for Na-ion batteries

被引：14
作者：
Ding, Yuejun [1 ,2 ]
Ding, Feixiang [1 ]
Rong, Xiaohui [1 ]
Lu, Yaxiang [1 ]
Hu, Yong-Sheng [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Key Lab Renewable Energy,Beijing Key Lab New Ener, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China
来源：
CHINESE PHYSICS B | 2022年 / 31卷 / 06期
基金：
中国国家自然科学基金;
关键词：
copper redox; layered oxide; cathode; Na-ion batteries; energy storage; HIGH-VOLTAGE CATHODE; CO-SUBSTITUTION; SODIUM; CU; REDOX;
D O I：
10.1088/1674-1056/ac523b
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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 Na0.90Cu0.22Fe0.30Mn0.48O2 with good comprehensive performance and low-cost element components is very promising for the practical use. However, only part of the Cu3+/Cu2+ redox couple participated in the redox reaction, thus impairing the specific capacity of the cathode materials. Herein, Mg2+-doped O3-Na0.90Mg0.08Cu0.22Fe0.30Mn0.40O2 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 Na0.90Cu0.22Fe0.30Mn0.48O2). This work demonstrates an important strategy to obtain advanced layered oxide cathodes for NIBs.
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页数：7
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