摘要
锂离子电池用富镍正极材料LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)具有高能量密度、高安全性等优点。受容量衰减、循环寿命和热稳定性等方面的限制,该材料进一步的改性成为当前研究的热点。针对LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)材料的改性研究主要集中在离子掺杂、表面包覆和结构设计等方面。离子掺杂能改善结构稳定性和电化学性能,特别是过渡金属离子的掺杂有助于延长循环寿命和提高结构稳定性;表面包覆改性可增强电化学稳定性和抗氧化性能,延长循环寿命和提高抗极化能力;结构设计可优化晶体结构、提高传导性能和缓解应力,提高循环稳定性、容量保持率和功率密度。
The nickel-rich cathode material LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)for Li-ion battery has the advantages of high energy density and high safety.Due to the limitations of capacity decay,cycle life and thermal stability,its further modification research has become a hot spot in current research.Research on the modification of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)material has mainly focused on these aspects:ion doping,surface coating and structural design.Ion doping improves structural stability and electrochemical performance,particularly the doping of transition metal ions,which helps to prolong cycle life and increase structural stability.Surface coating modification can enhance the electrochemical stability and oxidation resistance,prolong cycle life and increase anti-polarization ability.Structural design can optimize crystal structure,increase conductivity and relieve stress,thus increase cycle stability,capacity retention and power density.
作者
王恩通
高淑娟
WANG Entong;GAO Shujuan(Department of Chemical and Materials Engineering,Lyuliang University,Lyuliang,Shanxi 033001,China;Institute of Molecular Science,Shanxi University,Taiyuan,Shanxi 030006,China)
出处
《电池》
CAS
北大核心
2024年第4期584-588,共5页
Battery Bimonthly
基金
吕梁市科技计划项目(2022GXYF06)
吕梁学院新能源材料开发利用技术研发与服务(LLXYHX202311-08)
吕梁学院锂电池开发应用调研与技术研发服务(LLXYHX202312-13)。
