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Vol.49, No.2, 174 ~ 180, 2011
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| Title |
| Surface Morphology Changes of Lithium/Sulfur Battery using Multi-walled carbon nanotube added Sulfur Electrode during Cyclings |
| 진창수 Chang Soo Jin , 김기원 Ki Won Kim , 박진우 Jin Woo Park , 안주현 Jou Hyeon Ahn , 신경희 Kyung Hee Shin , 안효준 Hyo Jun Ahn , 유지현 Ji Hyun Yu , 류호석 Ho Suk Ryu , 김영철 Young Chal Kim |
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| Abstract |
| We investigated the surface morphology changes of a lithium/sulfur battery using multi-walled canbon nanotube added sulfur electrode during charge-discharge cycling. The Li/S cell showed the first discharge capacity of 1286 mAh/g-S, which utilized is 71% of the theoretical value. It decreased to 328 mAh/g-S at the 100th cycle, which corresponds to about 19% utilization of the total sulfur in the cathode. The spherical lumps of the reaction product were observed on the surface of the sulfur electrode. This material was verified as lithium sulfide by X-ray diffraction measurement. The pores in the separator were filled with reaction product. Thus the diffusion of the Li+ ion decreased, which resulted in the decreased capacity of the Li/S cell. |
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| Key Words |
| energy storage materials, mechanical alloying/milling, electrochemistry, SEM, Lithium/sulfur battery |
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