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-352
Subject Synthesis of GeH and GeCH3 and its application to Li and Na ion battery
Authors 강민경, 김성진1,*
이화여자대학교 화학나노과학과, Korea
1이화여자대학교 화학과, Korea
Abstract Germanium has been considered as a promising anode material because of its comparable lithium and sodium storage capability and fast Li diffusivity. Nevertheless, despite the huge capacity, it exhibits poor cycling stability due to the drastic volume change during the lithium or sodium uptake and release processes, leading to structural damage and capacity fading. To improve the cycle performance, two-dimensional (2D) materials with weak interaction between the layers have been proposed as promising anodes in Li-ion batteries because the structural damage by large volume variation could be decreased due to stretching vertically between layers instead of volume change to all directions. Here we show that germanane (GeH) and methyl-terminated germanane (GeCH3 ) made from calcium germanide (CaGe2 ) can be used as promising anodes for Li and Na ion batteries. The germanane (GeH) and methyl-terminated germanane (GeCH3 ) were synthesized using by solid state reaction. The crystal structures of the sample were analyzed by X-ray diffraction (XRD) and RAMAN spectrum. The batteries of germanane (GeH) and methyl-terminated germanane (GeCH3 ) were tested as high capacity anodes in lithium ion (Li-ion) batteries using Wonatech WBCS3000S battery test system.
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