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Aqueous Lithium‐ion Battery LiTi 2 (PO 4 ) 3 /LiMn 2 O 4 with High Power and Energy Densities as well as Superior Cycling Stability**
Author(s) -
Luo J.Y.,
Xia Y.Y.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200700638
Subject(s) - materials science , aqueous solution , electrolyte , electrochemistry , lithium (medication) , cathode , anode , battery (electricity) , chemical engineering , lithium ion battery , electrode , specific energy , inorganic chemistry , organic chemistry , chemistry , endocrinology , medicine , power (physics) , physics , quantum mechanics , engineering
Porous, highly crystalline Nasicon‐type phase LiTi 2 (PO 4 ) 3 has been prepared by a novel poly(vinyl alcohol)‐assisted sol–gel route and coated by a uniform and continuous nanometers‐thick carbon thin film using chemical vapor deposition technology. The as‐prepared LiTi 2 (PO 4 ) 3 exhibits excellent electrochemical performance both in organic and aqueous electrolytes, and especially shows good cycling stability in aqueous electrolytes. An aqueous lithium‐ion battery consisting of a combination of LiMn 2 O 4 cathode, LiTi 2 (PO 4 ) 3 anode, and a 1 M Li 2 SO 4 electrolyte has been constructed. The cell delivers a capacity of 40 mA h g –1 and a specific energy of 60 W h kg –1 with an output voltage of 1.5 V based on the total weight of the active electrode materials. It also exhibits an excellent cycling stability with a capacity retention of 82 % over 200 charge/discharge cycles, which is much better than any aqueous lithium‐ion battery reported.