Electrochemical characteristics of LiMn2O4 (Li/Ni) cathode materials

Fei Yi Hung, Truan Sheng Lui, Li Hui Chen, Hung Chi Liao

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

The present study used the Pechini process with a continuous furnace to synthesize LiMn2O4 powders. After heat treatment, the particle size and lattice constant of the LiMn2O4 powder increased. For heat treatment cathode powders (LMO800), due to both the average valence of Mn cations approaching the theoretical value and the higher crystalinity, the discharge capacities are raised significantly. The charge and discharge cycling capacity of LMO800 powder was best at 25°C. Under the charge-discharge cycling test at 55°C, some Mn ions dissolved easily into the electrolyte resulting in a significant decrease in the charge and discharge capacity with increasing the cycling number. The surface modification powder (LMO-Ni) contains a surface oxidative film of lithium-nickel-manganese that not only restrains Mn ions dissolved into the electrolyte, but also improves the charge and discharge capacity at 55°C.

原文English
頁(從 - 到)2759-2764
頁數6
期刊Materials Transactions
47
發行號11
DOIs
出版狀態Published - 2006 十一月

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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