期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 29, 页码 10777-10784出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm00059d
关键词
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资金
- Finetex-HKUST R D Center [FTG001-MECH.07/08]
- Hong Kong SAR [GHP/029/08SZ]
A porous cathode material consisting of interconnected single crystal LiNi1/3Co1/3Mn1/3O2 (NCM) nanoparticles has been synthesized for lithium ion batteries. Trace nitric acid is used as pH value adjuster to form honeycomb-shaped foam, and a novel stepwise crystallization process is employed to obtain NCM particles. The modified sol-gel process followed by an optimized crystallization process results in significant improvements in chemical and physical characteristics of the NCM particles. They consist of a fully-developed single crystal NCM with uniform composition and a porous NCM architecture with a reduced degree of fusion and a large specific surface area. These structural modifications in turn significantly enhance the electrochemical properties of the NCM cathode material, in terms of improved charge/discharge capacity, cyclic stability and rate capability.
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