Zhang Guanhua, Wang Hao, Yang Zihan, Xie Haoyang, Jia Zhenggang, Xiong Yueping
Queen Mary University of London Engineering School, Northwestern Polytechnical University, Xi'an 710100, China.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Materials (Basel). 2023 Aug 1;16(15):5398. doi: 10.3390/ma16155398.
LiNiCoMnO (LNCMO) cathode materials for lithium-ion batteries (LIBs) were prepared by the hydrothermal synthesis of precursors and high-temperature calcination. The effect of precursor hydrothermal synthesis temperature on the microstructures and electrochemical cycling performances of the Ni-rich LNCMO cathode materials were investigated by SEM, XRD, XPS and electrochemical tests. The results showed that the cathode material prepared using the precursor synthesized at a hydrothermal temperature of 220 °C exhibited the best charge/discharge cycle stability, whose specific capacity retention rate reached 81.94% after 50 cycles. Such enhanced cyclic stability of LNCMO was directly related to the small grain size, high crystallinity and structural stability inherited from the precursor obtained at 220 °C.
通过前驱体的水热合成和高温煅烧制备了用于锂离子电池（LIBs）的LiNiCoMnO（LNCMO）正极材料。采用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、X射线光电子能谱仪（XPS）和电化学测试等手段，研究了前驱体水热合成温度对富镍LNCMO正极材料微观结构和电化学循环性能的影响。结果表明，使用在220℃水热温度下合成的前驱体制备的正极材料表现出最佳的充放电循环稳定性，在50次循环后其比容量保持率达到81.94%。LNCMO这种增强的循环稳定性直接与从220℃获得的前驱体继承而来的小晶粒尺寸、高结晶度和结构稳定性有关。
