X射线光电子能谱
化学
镍
阴极
扫描电子显微镜
钴
锰
电化学
氢氧化物
感应耦合等离子体
分析化学(期刊)
浸出(土壤学)
化学工程
无机化学
电极
材料科学
等离子体
复合材料
色谱法
物理化学
土壤科学
土壤水分
有机化学
量子力学
工程类
环境科学
物理
作者
Yue Yang,Guoyong Huang,Ming Xie,Shengming Xu,Yinghe He
标识
DOI:10.1016/j.hydromet.2015.11.015
摘要
To reduce the cost of the complex separation process of nickel, cobalt or manganese from the leaching liquid, a high value-adding process for the direct synthesis of LiNi0.8Co0.1Mn0.1O2, LiNi0.5Co0.2Mn0.3O2 and LiNi0.33Co0.33Mn0.33O2 as active cathode materials by the hydroxide co-precipitation method is developed in this paper. The structure, morphology and composition of the regenerated LiNixCoyMn1-x-yO2 cathode materials are determined with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma atomic emission spectrometry (ICP–AES) and energy dispersive X-ray spectroscopy system (EDXS), respectively. The results show that the regenerated cathode materials have a well-defined layered structure and retain the characteristics of their corresponding hydroxide precursors with a spherical morphology and a particle size in the range from 9 to 12 μm in diameter. Electrochemical tests show that the regenerated cathode materials have good electrochemical performances. The initial discharge capacities (0.1C, 2.7–4.3 V) of the regenerated LiNixCoyMn1-x-yO2 are 197.7 mAh g− 1, 174.3 mAh g− 1 and 168.3 mAh g− 1 for x = 0.8, 0.5 and 0.33, respectively. The discharge capacities of all materials decrease with increasing discharging current densities and the capacity retention ratios of LiNi0.8Co0.1Mn0.1O2, LiNi0.5Co0.2Mn0.3O2 and LiNi0.33Co0.33Mn0.33O2 are 86.3%, 95% and 96% respectively after 50 cycles. Overall, the results show that the performances of regenerated LiNixCoyMn1-x-yO2 are similar to those of the materials prepared from mixed solution of virgin nickel, cobalt and manganese chemicals.
科研通智能强力驱动
Strongly Powered by AbleSci AI