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LiVPO 4 F: A New Cathode for High‐Energy Lithium Ion Capacitors
Author(s) -
Satish Rohit,
Aravindan Vanchiappan,
Ling Wong Chui,
Madhavi Srinivasan
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600912
Subject(s) - capacitor , cathode , electrode , lithium (medication) , ion , materials science , energy density , current density , carbothermic reaction , carbon fibers , analytical chemistry (journal) , chemistry , electrical engineering , composite material , voltage , engineering physics , physics , chromatography , organic chemistry , composite number , engineering , quantum mechanics , medicine , carbide , endocrinology
We report, for the first time, the possibility of using tavorite type LiVPO 4 F 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 LiVPO 4 F 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 LiVPO 4 F/AC configuration delivered the maximum energy density of 30 Wh kg –1 . A good cycleability is also evidenced, for instance, ∼90 % of the initial value is retained after 1000 cycles.