材料科学
电化学
阴极
锂(药物)
化学工程
溶剂热合成
电池(电)
形态学(生物学)
微观结构
锂离子电池
纳米技术
相(物质)
离子
复合材料
电极
化学
有机化学
物理
工程类
内分泌学
物理化学
功率(物理)
生物
医学
量子力学
遗传学
作者
Hongbing Ding,Xinlu Wang,Jinjin Wang,Hongbo Zhang,Guixia Liu,Wensheng Yu,Xiangting Dong,Jinxian Wang
标识
DOI:10.1016/j.jpowsour.2022.232307
摘要
High performance Ni-rich layered materials are widely regarded as valuable energy materials due to their good electrochemical performance and low preparation cost. The design of reasonable morphology and size is one of the effective ways to improve the structural stability of lithium-ion battery cathode materials. Here, a simple glycerin solvothermal strategy is introduced to achieve this goal. Furthermore, the influence of microstructure on the electrochemical properties and structural stability of Ni-rich layered cathode materials is studied. In particular, the cathode material LiNi 0.6 Co 0.2 Mn 0.2 O 2 -50% glycerin (NCM-5) in the form of microspheres shows the best electrochemical performance and cyclic stability in all samples. After 100 cycles, the capacity retention rate is 79.25%. It is confirmed that the specific morphology and reasonable size can effectively alleviate the structural degradation and phase transition of particles after long-term cyclic testing. • Developed a glycerin-assisted solvothermal strategy to controlled-synthesis NCM622. • The morphology of NCM622 could be adjusted by the addition of glycerin. • Glycerin could effectively regulate the direction of crystal growth. • The NCM622 microspheres showed the best cycle stability and rate capability.
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