119th General Meeting of the KCS

Type Poster Presentation
Area 재료화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code MAT.P-345
Subject Sodium Storage Property of WSe2 with Different Particle Size and Irradiation Dose
Authors 천유경, 백승민*
경북대학교 화학과, Korea
Abstract Sodium ion battery was expected to be a next-generation battery that can replace lithium-ion battery because sodium is abundant in deposit and has a physicochemical similarity with lithium. However, since the radius of the sodium ion (0.106 nm) is larger than the radius of the lithium ion (0.076 nm), it is necessary to experience rapid volume change and capacity reduction during the charging/discharging process. Therefore, to develop a sodium ion battery with improved electrochemical performance, a new strategy must be attempted. Systematic research on developing local disorder at WSe2 was carried out to obtain enhanced sodium storage property. By adopting mechanical method, exfoliated WSe2 and its self-restacked form were successfully synthesized. The synthesized WSe2 nanosheets with different particle sizes were further treated by ion beam. The shapes of restacked layers were characterized from scanning electron microscopy while developed local disorders were confirmed from changes in EXAFS and Raman. Changes in electrochemical properties such as cyclabilities and specific capacities were probed from the charge/discharge experiments.
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