无机化学学报
無機化學學報
무궤화학학보
JOURNAL OF INORGANIC CHEMISTRY
2006年
2期
311-315
,共5页
方海升%王志兴%李新海%尹周澜%郭华军%彭文杰
方海升%王誌興%李新海%尹週瀾%郭華軍%彭文傑
방해승%왕지흥%리신해%윤주란%곽화군%팽문걸
锂离子电池%LiNi0.5Mn15O4%固相法
鋰離子電池%LiNi0.5Mn15O4%固相法
리리자전지%LiNi0.5Mn15O4%고상법
lithium ionic battery%LiNi0.5Mn1.5O4%solid-state method
Well-developed crystalline LiNi0.5Mn1.5O4 was prepared by solid-state reaction using Li2CO3, NiO and electrolytic MnO2 at high heating and cooling rate. X-ray diffraction (XRD) patterns and scanning electron microscopic (SEM) images showed that LiNi0.5Mn1.5O4 synthesized at 900 ℃ and 950 ℃ had cubic spinel structure with clearly defined shape. LiNi0.5Mn1.5O4 spinel phase decomposed at 1 000 ℃ accompanying with structural and morphological degradation. TG measurement revealed that the weight loss during heating process could be mostly gained in cooling process, and the upward tendency of weight loss during heating process decreased, while that of irreversible weight loss rapidly increased with the increase of temperature. LiNi0.5Mn1.5O4 powders prepared at 900addition, by adjusting the calcination time at 900 ℃, the capacity and cycling performance of LiNi0.5Mn1.5O4 were further enhanced.
