期刊论文

Chen, ZY

中文

无机化学学报

1001-4861

2005

21

9

1417-1421

10.3321/j.issn:1001-4861.2005.09.030

本校为第一且通讯机构

尖晶石型Li-Ni-Mn-O复合氧化物是一种高能量密度和高功率密度的锂离子电池正极材料,在近5 V平台显示了较高的可逆放电容量,具有广阔的应用前景[1～3].尖晶石锰酸锂作为锂离子电池正极材料具有价格便宜,环境友好,安全性好等优点,但是,由于三价锰的存在引起了晶体结构畸变降低了材料的循环性能,同时,由于锰在电解液中的溶解进一步破坏了晶体的结构,尤其是在高温下溶解急剧增加,也影响了锰酸锂的循环稳定性[4～6].

LiNi0.5Mn1.5O4 was synthesized by solid-state reaction with different Ni containing precursors. The effect of precursor on electrochemical performance was studied. It was demonstrated that LiNi0.5Mn1.5O4 synthesized with Ni(NO 3)2·6H2O as precursor had good charge-discharge performances. At the potential range of 3.0-5.0 V, the reversible capacity of the above LiNi0.5Mn1.5O4 could reach to 145 mAh·g-1 and remained 143 mAh·g -1 after 10 cycles, while at 3.0-4.9 V, there was still 133 mAh·g-1 reversible capacity, and was 125 mAh·g -1 after 4...