A layered lithium nickel manganese oxide as environmentally friendly cathode material for secondary batteries

M. Arinawati, F. Nugroho, C. Yudha
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引用次数: 1

Abstract

Cobalt-free cathode material development is considered necessity to assure the sustainability of Li-ion batteries. Cobalt is always considered expensive and unsafe for both human and environment. LiNi0.5Mn0.5O2 (LNMO) is a layer structured cathode material that has similar feature to LiCoO2 (LCO). A simple and fast processing of LNMO is proposed. A precipitation of nickel manganese oxalate was obtained in a batch reactor under atmospheric condition. The as-obtained homogenous oxalate precursor was converted to LNMO via high temperature lithiation. Based on the XRD result, a crystalline product with layer structure is successfully obtained. The presence of impurities such as residual Li can be detected from the FTIR spectra. SEM Images confirmed quasi-spherical particles with grain size of less than 10 micrometer. The charge-discharge analysis of LNMO containing cell deliver a capacity of 42 mAh/g. In spite of its promising report, continuous improvement is necessary to obtain cell with better electrochemical performance.
层状锂镍锰氧化物作为二次电池的环保正极材料
无钴正极材料的发展被认为是保证锂离子电池可持续性的必要条件。钴一直被认为是昂贵的,对人类和环境都不安全。LiNi0.5Mn0.5O2 (LNMO)是一种与LiCoO2 (LCO)具有相似特性的层状结构正极材料。提出了一种简单快速的LNMO处理方法。在常压条件下间歇式反应器中获得了草酸镍锰的沉淀。所得的均相草酸盐前驱体经高温锂化反应转化为LNMO。根据XRD结果,成功地获得了具有层状结构的结晶产物。在FTIR光谱中可以检测到杂质的存在,如残余锂。SEM图像证实颗粒为准球形,粒径小于10微米。经充放电分析,含LNMO电池的容量为42 mAh/g。尽管有很好的报道,但要获得电化学性能更好的电池,还需要不断的改进。
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