摘要
钴酸锂(LiCoO_(2))作为正极材料,理论比容量高(约274 mAh/g)、工作电压高(约3.7~4.2 V),且可逆性良好。在高电压下,LiCoO_(2)可能会发生不可逆的相变和层状结构崩塌,热分解释放的氧气还可能引发电池起火或爆炸,会对电池的循环寿命和安全性造成较大影响。综述近年来采用体相掺杂和表面包覆两种方法对LiCoO_(2)进行改性的研究进展,并简要介绍其他改性方法的研究成果,对高电压LiCoO_(2)材料的发展趋势进行展望。
Lithium cobalt oxide(LiCoO_(2)),as a cathode material,has a high theoretical specific capacity of approximately 274 mAh/g,a high operating voltage of 3.7-4.2 V,and good reversibility.Under high voltage conditions,LiCoO_(2)is prone to irreversible phase transitions and structural collapse,with the risk of oxygen release from thermal decomposition potentially leading to battery fires or explosions,adversely affecting the cycle life and safety of the batteries.The recent advancements in the modification of LiCoO_(2),focusing on bulk doping and surface coating as the two methods are summarized,the outcomes of other modification techniques are briefly introduced.A perspective on the future research trends for high-voltage LiCoO_(2)materials is offered.
作者
张继阳
郭荣荣
聂贞
苏丹
ZHANG Jiyang;GUO Rongrong;NIE Zhen;SU Dan(School of Electrical Engineering and Automation,Henan Institute of Technology,Xinxiang 453003,Henan,China;Henan Xintaihang Power Supply Co.,Ltd.,Xinxiang 453000,Henan,China;School of Management,Tianjin University of Technology,Tianjin 300384,China)
出处
《电池》
2025年第4期837-843,共7页
Battery Bimonthly
基金
河南省科技攻关项目(232102240100)。
作者简介
通信作者:张继阳(1990-),男,河南人,河南工学院电气工程与自动化学院讲师,硕士,研究方向:新能源发电、电源储能。
