欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文)

• 电化学获奖人优秀论文专辑 •    

高电压LiCoO2的表面结构与性能:回顾与展望

方建军a,b,杜宇豪a,李子健a,樊文光a*,任恒宇a,易浩聪a,赵庆贺a*,潘锋a*   

  1. a. 北京大学深圳研究生院新材料学院,中国 深圳 518055;b. 乾途电池科技有限公司,中国 东莞 523808
  • 出版日期:2024-02-21 发布日期:2024-02-21
  • 通讯作者: 潘锋 E-mail:panfeng@pkusz.edu.cn
  • 作者简介:方建军,杜宇豪,李子健,樊文光,任恒宇,易浩聪,赵庆贺,潘锋

Surface Structures and Properties of High-Voltage LiCoO2: Reviews and Prospects

Jianjun Fanga,b Yuhao Dua Zijian Lia Wenguang Fana,* Hengyu Rena Haocong Yia Qinghe Zhaoa,* Feng Pana,*   

  1. a J. Fang, Y. Du, Z. Li, W. Fan, H. Ren, H. Yi, Q. Zhao, F. Pan. School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen Guangdong province, 518055, China. b J. Fang Qiantu battery Technology Co. Ltd. Dongguan, Guangdong Province, 523808, China
  • Published:2024-02-21 Online:2024-02-21
  • Contact: Feng Pan E-mail:panfeng@pkusz.edu.cn
  • About author:Jianjun Fang, Yuhao Du, Zijian Li, Wenguang Fan, Hengyu Ren, Haocong Yi, Qinghe Zhao, Feng Pan

摘要: 近年来,高电压LiCoO2(LCO)正极的研发成为学术界和工业界广泛关注的焦点。研究表明,解决表面问题是提升高电压LCO性能的最有效途径。本综述系统回顾了高电压LCO所面临的问题,包括相变和裂纹的生成、与氧氧化还原相关的问题以及副反应,以及表面结构的退化。接着,我们深入阐述了表面调制,以及表面调制与电解质调制之间的相互作用。最后,我们展望了更先进的LCO正极的发展前景,包括低成本高质量的制造,设计适用于极端条件(如高温、高速充电、低温等)的LCO正极,并实现约220 mAh g-1的稳定容量释放。我们期望这项工作能为未来推动高电压LCO的发展和应用提供参考。

关键词: LiCoO2, 界面结构, 相转变, 表面修饰, 正极电解质界面

Abstract: Nowadays, the development of high-voltage LiCoO2 (LCO) cathodes has attracted the widespread attention from both the academic and industry fields. Among the multiple concerns, researches on the surface issues provide the most effective performance optimization pathway for the synthesis of high-voltage LCO. In this work, the issues of high-voltage LCO have been systematically reviewed, including the phase transitions and crack’s formation, the oxygen redox related issues and side reactions, as well as the surface structure degradation. Then, we further clarify the surface modulations and the interplay between the surface modulation and electrolyte tuning. Finally, we propose our prospects for developing the more advanced LCO cathodes, including the low-cost and high-quality manufacturing, designing suitable LCO cathodes in some extreme conditions (such as, high-temperature, high-rate charging, low temperature, etc.), and achieving stabilized capacity release of about 220 mAh g-1 of LCO, etc. We hope that this work can serve as a reference to promote the development and application of high-voltage LCO in future.

Key words: LiCoO2, Interface structures, Phase transition, Surface modulation, CEI