期刊
JOURNAL OF POWER SOURCES
卷 324, 期 -, 页码 106-112出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.05.064
关键词
O3-type; Layered structure; Cathode material; Sodium ion battery; Oxalate
资金
- Global Frontier R&D Program on Center for Hybrid Interface Materials (HIM) - Ministry of Science, ICT and Future Planning [2013M3A6B1078875]
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20154010200840]
- Korea government Ministry of Trade, Industry and Energy
We investigate that the effect of Ni and Fe contents on structural and electrochemical properties of O3-type layered Na[Ni0.75-xFexMn0.25]O-2 (x = 0.4, 0.45, 0.5, and 0.55) in which Mn is fixed at 25%. As increasing the Ni contents, the capacities are gradually higher while the capacity retention and thermal properties are inferior. When Fe contents are increased, by contrast, the electrode exhibits stable capacity retention and satisfactory thermal stability although the resulting capacity slightly decreases. Structural investigation of post cycled electrodes indicate that lattice variation is greatly suppressed from x = 0.5 in Na[Ni0.75-xFexMn0.25]O-2. This indicates that an appropriate amount of Fe into the Na[Ni0.75-xFexMn0.25]O-2 stabilizes the crystal structure and this leads to the good cycling performances. Also, the better structural stability obtained by Fe addition is responsible for the less heat generation at elevated temperature for the desodiated Na1-delta[Ni0.75-xFexMn0.25]O-2 (x = 0.4, 0.45, 0.5, and 0.55) caused by less evaporation of oxygen from the crystal structure.(C) 2016 Elsevier B.V. All rights reserved.
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