中国物理B ›› 2024, Vol. 33 ›› Issue (8): 88202-088202.doi: 10.1088/1674-1056/ad50c2

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Surface encapsulation of layered oxide cathode material with NiTiO3 for enhanced cycling stability of Na-ion batteries

Zilin Hu(胡紫霖)1,2,†, Bin Tang(唐彬)6,†, Ting Lin(林挺)5, Chu Zhang(张楚)1,2, Yaoshen Niu(牛耀申)1, Yuan Liu(刘渊)1,2, Like Gao(高立克)7, Fei Xie(谢飞)1, Xiaohui Rong(容晓晖)1,4, Yaxiang Lu(陆雅翔)1,3,‡, and Yongsheng Hu(胡勇胜)1,2,3,4,§   

  1. 1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Huairou Division, Institute of Physics, Chinese Academy of Sciences, Beijing 101400, China;
    4 Yangtze River Delta Physics Research Center Co. Ltd, Liyang 213300, China;
    5 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100049, China;
    6 Yangtze River Delta Physics Research Center Co. Ltd, Liyang 213300, China;
    7 Guangxi Power Grid Co. Ltd., Nanning 530023, China
  • 收稿日期:2024-04-16 修回日期:2024-05-07 出版日期:2024-08-15 发布日期:2024-07-29
  • 通讯作者: Yaxiang Lu, Yongsheng Hu E-mail:yxlu@iphy.ac.cn;yshu@iphy.ac.cn
  • 基金资助:
    Project supported by the National Key R&D Program of China (Grant No. 2022YFB2402500), the National Natural Science Foundation of China (Grant Nos. 52122214, 92372116, and 52394174), Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2020006), Jiangsu Province Carbon Peak and Neutrality Innovation Program (Industry tackling on prospect and key technology BE2022002-5), and Guangxi Power Grid Project (Grant No. GXKJXM20210260).

Surface encapsulation of layered oxide cathode material with NiTiO3 for enhanced cycling stability of Na-ion batteries

Zilin Hu(胡紫霖)1,2,†, Bin Tang(唐彬)6,†, Ting Lin(林挺)5, Chu Zhang(张楚)1,2, Yaoshen Niu(牛耀申)1, Yuan Liu(刘渊)1,2, Like Gao(高立克)7, Fei Xie(谢飞)1, Xiaohui Rong(容晓晖)1,4, Yaxiang Lu(陆雅翔)1,3,‡, and Yongsheng Hu(胡勇胜)1,2,3,4,§   

  1. 1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Huairou Division, Institute of Physics, Chinese Academy of Sciences, Beijing 101400, China;
    4 Yangtze River Delta Physics Research Center Co. Ltd, Liyang 213300, China;
    5 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100049, China;
    6 Yangtze River Delta Physics Research Center Co. Ltd, Liyang 213300, China;
    7 Guangxi Power Grid Co. Ltd., Nanning 530023, China
  • Received:2024-04-16 Revised:2024-05-07 Online:2024-08-15 Published:2024-07-29
  • Contact: Yaxiang Lu, Yongsheng Hu E-mail:yxlu@iphy.ac.cn;yshu@iphy.ac.cn
  • Supported by:
    Project supported by the National Key R&D Program of China (Grant No. 2022YFB2402500), the National Natural Science Foundation of China (Grant Nos. 52122214, 92372116, and 52394174), Youth Innovation Promotion Association of the Chinese Academy of Sciences (Grant No. 2020006), Jiangsu Province Carbon Peak and Neutrality Innovation Program (Industry tackling on prospect and key technology BE2022002-5), and Guangxi Power Grid Project (Grant No. GXKJXM20210260).

摘要: In Na-ion batteries, O3-type layered oxide cathode materials encounter challenges such as particle cracking, oxygen loss, electrolyte side reactions, and multi-phase transitions during the charge/discharge process. This study focuses on surface coating with NiTiO$_{3}$ achieved via secondary heat treatment using a coating precursor and the surface material. Through in-situ x-ray diffraction (XRD) and differential electrochemical mass spectrometry (DEMS), along with crystal structure characterizations of post-cycling materials, it was determined that the NiTiO$_{3}$ coating layer facilitates the formation of a stable lattice structure, effectively inhibiting lattice oxygen loss and reducing side reaction with the electrolyte. This enhancement in cycling stability was evidenced by a capacity retention of approximately 74% over 300 cycles at 1 C, marking a significant 30% improvement over the initial sample. Furthermore, notable advancements in rate performance were observed. Experimental results indicate that a stable and robust surface structure substantially enhances the overall stability of the bulk phase, presenting a novel approach for designing layered oxide cathodes with higher energy density.

关键词: Na-ion battery, layered oxides, high voltage, surface coating

Abstract: In Na-ion batteries, O3-type layered oxide cathode materials encounter challenges such as particle cracking, oxygen loss, electrolyte side reactions, and multi-phase transitions during the charge/discharge process. This study focuses on surface coating with NiTiO$_{3}$ achieved via secondary heat treatment using a coating precursor and the surface material. Through in-situ x-ray diffraction (XRD) and differential electrochemical mass spectrometry (DEMS), along with crystal structure characterizations of post-cycling materials, it was determined that the NiTiO$_{3}$ coating layer facilitates the formation of a stable lattice structure, effectively inhibiting lattice oxygen loss and reducing side reaction with the electrolyte. This enhancement in cycling stability was evidenced by a capacity retention of approximately 74% over 300 cycles at 1 C, marking a significant 30% improvement over the initial sample. Furthermore, notable advancements in rate performance were observed. Experimental results indicate that a stable and robust surface structure substantially enhances the overall stability of the bulk phase, presenting a novel approach for designing layered oxide cathodes with higher energy density.

Key words: Na-ion battery, layered oxides, high voltage, surface coating

中图分类号:  (Lithium-ion batteries)

  • 82.47.Aa
82.45.Fk (Electrodes)