期刊
ELECTROCHIMICA ACTA
卷 171, 期 -, 页码 35-41出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.05.015
关键词
Fluorine-Substitution; Acid Treatment; Li2MnO3 center dot Li[Mn0.60Ni0.25Co0.15]O-2 Cathode; Material; Structural stabilization; Secondary lithium batteries
资金
- Korea Electrotechnology Research Institute (KERI) Primary research program through the National Research Council of Science & Technology - Ministry of Science, ICT and Future Planning (MSIP) [15-12-N0101-58]
- Korea Evaluation Institute of Industrial Technology (KEIT) [15-12-N0101-58] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The 0.3Li(2)MnO(3)center dot 0.7Li[Mn0.60Ni0.25Co0.15]O1.975F0.025 cathode materials were synthesized by using a co-precipitation process in a Couette-Taylor reactor. Fluorine was substituted to facilitate the movement of lithium ions by forming more compact SEI layer and reduce the dissolution of transition metals, and lower internal impedance with charging/discharging cycling. In order to chemically remove the Li2O, the 0.3Li(2)MnO(3)center dot 0.7Li[Mn0.60Ni0.25Co0.15]O1.975F0.025 composites was preconditioned by a HNO3 solution. The acid-treated 0.3Li(2)MnO(3)center dot 0.7Li[Mn0.60Ni0.25Co0.15]O1.975F0.025 was showed the low initial irreversible capacity and the higher discharge capacity. The acid-treated and fluorine-substituted materials delivered the low initial discharge capacities, but it gradually increased during cycles. (C) 2015 Elsevier Ltd. All rights reserved.
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