Journal
ELECTROCHIMICA ACTA
Volume 208, Issue -, Pages 142-147Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.067
Keywords
sodium-ion battery; P2 phase; cathode; mixed structure; coulombic efficiency
Categories
Funding
- National Science Foundation of China [51577175]
- Hefei Center of Materials Science and Technology [2014FXZY006]
- Education Ministry of Anhui Province [KJ2014ZD36]
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Layered-structured ternary oxide Na-0.67[Ni0.4Co0.2Mn0.4]O-2 is synthesized as cathode material for sodium-ion batteries. Using a liquid nitrogen quenching process during the synthesis procedure, a Na-0.67[Ni0.4Co0.2Mn0.4]O-2 powder with a mixed P2-O3 structure is obtained, and then characterized. The Na//Na-0.67[Ni0.4Co0.2Mn0.4]O-2 cell delivers a reversible capacity of 167 mA h g(-1) and exhibits excellent cycling and rate performances without abnormal initial coulombic efficiency. (C) 2016 Elsevier Ltd. All rights reserved.
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