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Dual-functional structural modulation for stabilizing sodium layered oxide cathodes
Qiang Ma1, Qingqun Sun2, Jingqiang Wang3
1College 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, 451191, P. R. China.
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.
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