In this work, fine powders of spinel-type LiMn2O4 as cathode materials for lithium ion batteries (LIBs) were produced by a facile solution combustion synthesis using glycine as fuel and metal nitrates as oxidizers. Single phase of LiMn2O4 products were successfully prepared by SCS with a subsequent calcination treatment at 600-1000 degrees C. The structure and morphology of the powders were studied in detail by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical properties were characterized by galvanostatic charge-discharge cycling and cyclic voltammetry. The crystallinity, morphology, and size of the products were greatly influenced by the calcination temperature. The sample calcined at 900 C had good crystallinity and particle sizes between 500 and 1000 nm. It showed the best performance with an initial discharge capacity of 115.6 mAh g(-1) and a capacity retention of 93% after 50 cycles at a 1 C rate. In comparison, the LiMn2O4 sample prepared by the solid-state reaction showed a lower capacity of around 80 mAh g(-1).
展开▼
机译：在这项工作中，尖晶石型LiMn2O4细粉作为锂离子电池（LIBs）的正极材料，是通过使用甘氨酸作为燃料和金属硝酸盐作为氧化剂的简便溶液燃烧合成法生产的。通过SCS成功地制备了单相LiMn2O4产品，随后在600-1000摄氏度下进行了煅烧处理。通过X射线衍射，扫描电子显微镜和透射电子显微镜详细研究了粉末的结构和形态。电化学特性通过恒电流充放电循环和循环伏安法表征。煅烧温度极大地影响产物的结晶度，形态和尺寸。在900℃煅烧的样品具有良好的结晶度，粒径在500至1000 nm之间。它显示出最佳性能，初始放电容量为115.6 mAh g（-1），在1 C速率下经过50次循环后的容量保持率为93％。相比之下，通过固态反应制备的LiMn2O4样品显示出较低的容量，约为80 mAh g（-1）。
展开▼
