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Korean Journal of Metals and Materials > Volume 55(7); 2017 > Article
Korean Journal of Metals and Materials 2017;55(7): 503-508. doi: https://doi.org/10.3365/KJMM.2017.55.7.503
탄소-황 복합 전극 제조 방법에 따른 리튬-황 전고체 전지 성능 변화
최한울, 진주성, 임형태
창원대학교 신소재공학부
Effect of Preparation Methods on the Electrochemical Performance of All-solid-state Li-S Batteries
Han Ul Choi, Ju Sung Jin, Hyung-Tae Lim
School of Materials Science and Engineering, Changwon National University, Changwon 51140, Republic of Korea
Correspondence  Hyung-Tae Lim ,Tel: +82-55-213-3716, Email: htaelim@changwon.ac.kr
Received: 19 December 2016;  Accepted: 24 February 2017.  Published online: 4 July 2017.
All-solid-state Li-S batteries were fabricated with lithium silicide anodes (Li4.4Si), sulfide-based glass electrolyte (Li2S-P2S5), and a sulfur composite cathode. The sulfur based composite cathode was prepared using two methods; (Case 1) mortar-mixing and (Case 2) planetary ball milling at a rotation speed of 370 rev/min for 15 min. SEM analysis results indicated that the ‘Case 2’ method improved the distribution of sulfur, carbon and solid electrolyte particles, with a reduction in particle size. This effect was reflected in impedance spectra, and eventually in charge-discharge capacity: the electrode/electrolyte interface resistance was reduced so that the average charge-discharge capacities increased with the ‘Case 2’ cathode. Thus, the present work indicates the method of preparing the sulfur composite cathode profoundly affects the performance of solid state Li-S batteries.
Keywords: all-solid-state batteries, lithium-sulfur batteries, sulfur composite cathode
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