Dual-functional structural modulation for stabilizing sodium layered oxide cathodes

Qiang Ma; Qingqun Sun; Jingqiang Wang; Qicong Ling; Ruizi Li; Mengying Li; Zhuangchun Jian; Dixing Ni; Haodong Wang; Yafang Wang; Yanfang Zhu; Yao Xiao

doi:10.1039/D5CC07426F

Dual-functional structural modulation for stabilizing sodium layered oxide cathodes

Qiang Ma,†^a Qingqun Sun,†^b Jingqiang Wang,

*^c Qicong Ling,^b Ruizi Li,^b Mengying Li,^b Zhuangchun Jian,^b Dixing Ni,*^d Haodong Wang,^c Yafang Wang,^a Yanfang Zhu*^b and Yao Xiao

*^b

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* Corresponding authors

^a College of Materials Engineering, Henan International Joint Laboratory of Rare Earth Composite Materials, Henan Key Laboratory of Electronic Ceramic Materials and Application, Henan University of Engineering, Zhengzhou, Henan, P. R. China

^b College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
E-mail: yanfangzhu@wzu.edu.c, xiaoyao@wzu.edu.cn

^c College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, China
E-mail: wjq@imu.edu.cn

^d High Performance Computing Department, National Supercomputing Center in Shenzhen, Shenzhen, Guangdong, China
E-mail: nidx@nsccsz.cn

Abstract

A dual-functional structural modulation strategy was developed for sodium layered oxide cathodes via synergistic doping with W and B to form the inert Na₂WO₄ phase and strong B–O bonds, which can resist irreversible phase transitions and stabilize the crystal structure. This concurrent action enhances Na-ion diffusion kinetics and crystal structural stability, resulting in improved rate capability and cycling performance.

Chemical Communications

Dual-functional structural modulation for stabilizing sodium layered oxide cathodes

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Dual-functional structural modulation for stabilizing sodium layered oxide cathodes

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