Phase tuning of P2/O3-type layered oxide cathode for sodium ion batteries via a simple Li/F co-doping route
作者:
Liu, ZB (Liu, Zhengbo) ; Zhou, CJ (Zhou, Chaojin) ; Liu, J (Liu, Jun) [1] ; Yang, LC (Yang, Lichun) [1] ; Liu, JW (Liu, Jiangwen) ; Zhu, M (Zhu, Min)
CHEMICAL ENGINEERING JOURNAL
卷431
子辑3
文献号134273
DOI10.1016/j.cej.2021.134273
出版时间MAR 1 2022
已索引2022-03-30
文献类型Article
摘要
Element doping is a common and effective method for improving the electrochemical performance of cathode materials, and typically it can be divided into cation ion and anion ion doping. Among the cathode materials of sodium-ion batteries, the important layered oxide cathodes mainly include those of O3 and P2 types, according to the sites of Na ions and the number of oxide layer packings. Hereon, the successful transformation of O3-type cathode NaNi0.45Mn0.4Ti0.1Co0.05O2 (O3-NMTCO) into P2-type cathode of NaNi(0.45)Mn(0.4)Ti(0.1)Co(0.05)O(2)2-0.08LiF (P2-LNMTCOF) is achieved via a facile Li/F co-doping route. The modified P2-type cathode (P2-LNMTCOF) have main three advantages over the traditional P2-type cathode Na0.7Ni0.45Mn0.4Ti0.1Co0.05O2 (P2-NMTCO): higher Na content, solid solution reaction in high-voltage range, and stronger TM-F bond. As a result, the current P2LNMTCOF cathode shows the best cycling performance, with the initial capacity of about 160 mA h g(-1) and the capacity retention of 61% after 200 cycles. In addition, because of the more stable TM-O (F) octahedron, the voltage drop during cycling has been effectively suppressed. This study provides a new idea and reference for synthesizing high performance P2-type layered oxide cathode materials for sodium-ion batteries.
关键词
作者关键词Sodium ion batteryCathodeLayered oxidesP2-typeTOF-SIMS
Keywords PlusHIGH-CAPACITYPERFORMANCE CATHODEREDOX PROCESSESP2-TYPEO3-TYPE
作者信息
通讯作者地址
Liu, Jun;
Yang, Lichun
(通讯作者)
South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
地址
1 South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Peoples R China
2 South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Peoples R China
电子邮件地址msjliu@scut.edu.cnmslcyang@scut.edu.cn
类别/分类
研究方向Engineering