Journal
JOURNAL OF POWER SOURCES
Volume 216, Issue -, Pages 222-226Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.05.063
Keywords
Aqueous electrolyte; Electrochemistry; Intercalation; Metal electrode; Rechargeable battery
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Foundation for Innovation (CFI)
- Canada Research Chairs (CRC) Program
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A new aqueous rechargeable battery combining an intercalation cathode with a metal (first order electrode) anode has been developed. The concept is demonstrated using LiMn2O4 and zinc metal electrodes in an aqueous electrolyte containing two electrochemically active ions (Li+ and Zn2+). The battery operates at about 2 V and preliminarily tests show excellent cycling performance, with about 90% initial capacity retention over 1000 charge-discharge cycles. Use of cation-doped LiMn2O4 cathode further improves the cyclability of the system, which reaches 95% capacity retention after 4000 cycles. The energy density for a prototype battery, estimated at 50-80 Wh kg(-1), is comparable or superior to commercial 2 V rechargeable batteries. The combined performance attributes of this new rechargeable aqueous battery indicate that it constitutes a viable alternative to commercial lead-acid system and for large scale energy storage application. (C) 2012 Elsevier B.V. All rights reserved.
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