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硅烷偶联剂表面处理LiCrxMn2-xO4性能研究
Study on the performance of LiCrxMn2-xO4 by surfacetreatment with silane coupling agent
【摘要】 对尖晶石LiCrxMn2-xO4材料表面进行硅烷偶联剂处理,以形成热稳定性好的硅化物表面层,来提高材料的电化学性能。用EPX、SEM和XRD等方法对处理前后的尖晶石LiCrxMn2-xO4正极材料进行了表征,结果表明:经硅烷偶联剂处理后的LiCrxMn2-xO4正极材料,在其表面形成了富硅层,在高温下(55℃)100次循环后的容量保持率为89 4%;而未处理的LiCrxMn2-xO4材料的容量保持率为71 5%。
【Abstract】 Surface treatment with silane coupling agent on the spinel LiCrxMn2-xO4 was studied.The structure of LiCrxMn2-xO4 before and after treatment was characterized by EPX, SEM and XRD. The results showed that after coating, a silica enrichment on the surface of LiCrxMn2-xO4 was found and the positive materials had increased stability and reduced degradation rate.At high temperature (55 ℃),after 100 cycles, the LiCrxMn2-xO4/Li batteries discharge capacity before and after treatment was 89.4% and 71.5% of the initial capacity respectively.
【Key words】 Li-ion batteries; positive materials; spinel LiMn2O4; silane coupling agent;
- 【文献出处】 电池 ,Battery Bimonthly , 编辑部邮箱 ,2004年06期
- 【分类号】TM912.9
- 【被引频次】5
- 【下载频次】163