Hollow Multishelled Structural Li-rich Cathode with Al Doping Enabling Capacity and Voltage Stabled Li-ion Batteries

doi:10.1007/s40242-023-3128-8

Chemical Research in Chinese Universities ›› 2023, Vol. 39 ›› Issue (4): 630-635.doi: 10.1007/s40242-023-3128-8

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Hollow Multishelled Structural Li-rich Cathode with Al Doping Enabling Capacity and Voltage Stabled Li-ion Batteries

ZHAO Xiaolang^1,2, YANG Mei¹, WANG Jiangyan^1,3, WANG Dan^1,2,3

1. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P.R. China;
2. Qingdao University of Science and Technology, College of Chemistry and Molecular Engineering, Qingdao 266061, P.R. China;
3. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, P.R. China

Received:2023-05-17 Online:2023-08-01 Published:2023-07-18
Contact: WANG Dan, WANG Jiangyan, YANG Mei E-mail:danwang@ipe.ac.cn;jywang@ipe.ac.cn;myang@ipe.ac.cn
Supported by:
This work was supported by the National Key R&D Program of China (Nos.2021YFC2902503, 2022YFA1504101), the National Natural Science Foundation of China(Nos.21820102002, 21931012, 52261160573, 51972305), the Cooperation Fund of the Institute of Clean Energy Innovation, Chinese Academy of Sciences(No.DNL202020), the Zhongke-Yuneng Joint R&D Center Program, China(No.ZKYN2022008), and the IPE Project for Frontier Basic Research, China(No.QYJC-2022-008).

Abstract

Abstract: Li-rich layered oxide cathode materials have drawn great attention due to their high specific capacity and relatively low cost. However, their implementation is hindered by capacity and discharge voltage decay as well as poor rate performance. Herein, by combining the concepts of geometrical and atomic structure design, hollow multishelled structural Li-rich cathode material doped with aluminum element(Li-rich HoMS-Al) is developed to solve the above challenges. Li-rich HoMS-Al is synthesized through a facile sequential templating approach with the shell number, element molar ratio and Al doping amount accurately controlled. HoMS can effectively buffer the stress/strain during cycling, as well as shorten the ion and electron diffusion path, while Al doping can inhibit the phase transition of the material and reduce the surface oxygen precipitation. As a result, it achieved a high specific capacity, stable voltage and capacity during cycling, exhibiting an initial discharge specific capacity up to 300.6 mA·h·g^-1 at 0.1 C(1 C=300 mA/g) and maintaining 246.3 mA·h·g^-1 after 100 cycles.

Key words: Li-rich layered oxide, Hollow multishelled structure, Aluminum doping, Specific capacity, Cycling stability

ZHAO Xiaolang, YANG Mei, WANG Jiangyan, WANG Dan. Hollow Multishelled Structural Li-rich Cathode with Al Doping Enabling Capacity and Voltage Stabled Li-ion Batteries[J]. Chemical Research in Chinese Universities, 2023, 39(4): 630-635.

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Hollow Multishelled Structural Li-rich Cathode with Al Doping Enabling Capacity and Voltage Stabled Li-ion Batteries

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