Journal
JOURNAL OF POWER SOURCES
Volume 280, Issue -, Pages 703-709Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.062
Keywords
Li0.6Na2.4V2(PO4)(2)F-3; Lithium-insertion cathode; Battery; Ion-exchange; Hybrid-ion
Funding
- National Natural Science Foundation, China [21402063]
- Aid program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- College Students' Program of Science and Technology Entrepreneurship of Hunan Province, Changsha SaiKe New Energy and Technology Co. Ltd [2014GK4045]
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Li0.6Na2.4V2(PO4)(2)F-3 holding a NASICON structure is synthesized via ion exchange from Na3V2(PO4)(2)F-3. The Na+ ions at Na(2) sites and inserted Li+ ions in this NASICON structure are suggested to give a large initial specific capacity and a hybrid-ion migration during electrochemical cycling. As a lithium-inserted cathode material, Li0.6Na2.4V2(PO4)(2)F-3 exhibits a specific capacity of 123 mAhg(-1) at a current density of 0.1C with two plateaus around 3.77 and 4.19 V vs. Li+/Li. The capacity of the Li0.6Na2.4V2(PO4)(2)F-3/Li battery can retain 104 mAhg(-1) with a high coulombic efficiency of 98.6% at 0.1C after 151 cycles. (C) 2015 Elsevier B.V. All rights reserved.
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