KCS 121st General Meeting

Subject Study of the enhanced electrochemical properties and MAS NMR fine structure analysis of anion doped lithium vanadium borate
Code ANAL2.O-15
Time FRI 10 : 17
Area Oral Presentation of Young Analytical Chemists II
Type Oral Presentation
Authors CHAEWON Moon, YOUNGIL LEE*, Khoirul Umam1
Department of Chemistry, University of Ulsan, Korea
1Department of Chemistry, Universitas Indonesia., Korea
Abstract As a cathode material of Li-ion battery, lithium vanadium phosphate, Li3V2(PO4)3 (LVP), has a stable structure and high-voltage platform. However, LVP has low electronic conductivity and slow lithium-ion diffusion. As an alternative cathode material, Li3V2(BO3)3 (LVB) has weaker B-O bond which makes relatively fast lithium ion diffusion. Also, its theoretical reversible capacity is much larger of 268 mAh/g. Fluorine anion substituted Li3V2(BO3)2.95F0.15 has been synthesized by combustion method. Characterizations of prepared sample are investigated using by X-ray diffraction (XRD) and electrochemical measurements. Also, solid-state NMR is used to investigate its local electronic structure. The results of fluorine substituted LVB are shown improved long cycleability, rate performance, and structural stability. The best anion doping ratio in LVB is still under study with electrochemical properties.
E-mail cwm1216@naver.com