LiVPO4F: A New Cathode for High‐Energy Lithium Ion Capacitors. Issue 12 (11th August 2016)

• Record Type: Journal Article
• Authors: Satish, Rohit; Aravindan, Vanchiappan; Ling, Wong Chui; Madhavi, Srinivasan
• Is Part Of: ChemistrySelect. Volume 1:Issue 12(2016)
• Page Start: 3316
• Page End: 3322
• Publication Date: 2016-08-11
• Subjects: Energy density -- Insertion type -- Lithium-ion capacitor -- Lithium vanadium fluorophosphate; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201600912
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: We report, for the first time, the possibility of using tavorite type LiVPO4 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 LiVPO4 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 LiVPO4 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. Abstract : LiVPO4 F is synthesized using a carbon assisted reduction route. The formed material is tested as an electrode for Li‐ion capacitor applications.