摘要
采用Pechini法制备了尖晶石LiCrxMn2-xO4正极材料,并用X射线衍射仪、扫描电镜、充放电测试等手段研究了其晶体结构、表观形貌和电化学性能.结果表明,该法制备的尖晶石LiCrxMn2-xO4(0≤x≤0.1)正极材料为单一尖晶石结构,形貌较好,粒径分布均匀;晶胞参数随着Cr含量的增加而减小,但是Cr掺杂量对于产物的相结构和晶体形貌影响不大;Cr含量的增加使得LiCrxMn2-xO4的比容量减小,但却提高了尖晶石结构的稳定性和循环性能.
Spinel LiCrxMn2-xO4 cathode materials for Li-ion batteries were synthesized by Pechini process, and their crystalline structure, apparent morphology and electrochemical performance were characterized with XRD, SEM and charge-discharge test. Results show that the samples of LiCrxMn2-xO4 possess pure spinel phase, better morphology and uniform distribution of gain sizes, with the increase of Cr content, the lattice parameters are reduced, but Cr content has a little effect on the phase structure and morphology of LiCrxMn2-xO4. When Cr content increases, the specific capacity of the products will decrease, the stability of spinel structure and cycle performance will be improved.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期1127-1131,共5页
Journal of Inorganic Materials
基金
云南省省级重点实验室基金(14051038)
