期刊
CHEMISTRYSELECT
卷 1, 期 12, 页码 3316-3322出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.201600912
关键词
Energy density; Insertion type; Lithium-ion capacitor; Lithium vanadium fluorophosphate
资金
- National Research Foundation, Prime Minister's Office, Singapore under its CREATE programme (Campus for Research Excellence and Technological Enterprise)
We report, for the first time, the possibility of using tavorite type LiVPO4F as insertion electrode for Li-ion capacitor configuration with carbonaceous counterpart i.e. activated carbon (AC) in organic medium. Carbothermal reduction process is successfully employed to prepare LiVPO4F and the as-prepared material is subsequently characterized using various analytical techniques. Single electrode studies are conducted to estimate the optimum mass loading between two electrodes. A reversible capacity of 120 mAh g(-1) is obtained when cycled between 3-4.5 V vs. Li at current density of 50 mA g(-1). This has been further studied as cathode in a Li-ion capacitor configuration with AC. The LiVPO4F/AC configuration delivered the maximum energy density of 30 Wh kg(-1). A good cycleability is also evidenced, for instance, similar to 90% of the initial value is retained after 1000 cycles.
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