期刊
CHEMISTRY OF MATERIALS
卷 24, 期 17, 页码 3307-3317出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm3011937
关键词
Li-ion; positive electrode; layered oxide; Al-substitution; in situ diffraction
资金
- Office of Vehicle Technologies of the U.S. Department of Energy [DE-AC02-05CH11231]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
Single-phase LiNi0.45Mn0.45Co0.1-yAlyO2 layered oxide materials with 0 <= y <= 0.10 were prepared using the glycine-nitrate combustion method. Al-substitution has a minimal effect on the defect concentration and rate capability of the materials, but raises the operating voltage and reduces the capacity fade of the materials during prolonged cycling compared to the unsubstituted system. In situ X-ray diffraction suggests the presence of Al has a significant structural impact during battery operation. It acts to limit the changes in lattice parameters observed during electrochemical charging and cycling of the materials. High-resolution X-ray diffraction reveals structural distortions in the transition metal layers of as-synthesized powders with high Al-contents, as well as a structural evolution seen in all materials after cycling.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据