Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan , Jinan 250022, China.
ACS Appl Mater Interfaces. 2013 Oct 23;5(20):10227-32. doi: 10.1021/am4029526. Epub 2013 Oct 14.
High-voltage cathode material LiNi0.5Mn1.5O4 has been prepared with a novel organic coprecipitation route. The as-prepared sample was compared with samples produced through traditional solid state method and hydroxide coprecipitation method. The morphology was observed by scanning electron microscopy, and the spinel structures were characterized by X-ray diffraction and Fourier transform infrared spectroscopy. Besides the ordered/disordered distribution of Ni/Mn on octahedral sites, the confusion between Li and transition metal is pointed out to be another important factor responsible for the corresponding performance, which is worthy further investigation. Galvanostatic cycles, cyclic voltammetry, and electrochemical impedance spectroscopy are employed to characterize the electrochemical properties. The organic coprecipitation route produced sample shows superior rate capability and stable structure during cycling.
采用新型有机共沉淀法制备了高压阴极材料 LiNi0.5Mn1.5O4。将所制备的样品与通过传统固相法和氢氧化物共沉淀法制备的样品进行了比较。通过扫描电子显微镜观察了形貌，通过 X 射线衍射和傅里叶变换红外光谱对尖晶石结构进行了表征。除了八面体位置上 Ni/Mn 的有序/无序分布外，Li 和过渡金属的混淆被指出是导致相应性能的另一个重要因素，值得进一步研究。恒电流循环、循环伏安法和电化学阻抗谱用于表征电化学性能。有机共沉淀法制备的样品在循环过程中表现出优异的倍率性能和稳定的结构。
