Preparation of Sulfur/ Carbon Composite Sphere and its Application in Lithium-Sulfur Batteries

• Main Authors: CHUAN-SHENG CHO, 卓泉勝
• Other Authors: Chia-Chen Li
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/v7h4un

碩士 === 國立臺北科技大學 === 材料科學與工程研究所 === 107 === Lithium-sulfurs battery faces a problem of high loss of active materials because its reaction intermediates-polysulfides tend to dissolve in the electrolyte, leading to a weight loss of active powder from the cathode and a decaying of its capacity. In this study, we coat the surface of S crystals with carbon black (CB), and then the insulating S can help to transfer electrons during the charge-discharge process. Besides, the coated carbon black can help to reduce the dissolution of S and to perform a better cycle stability. Scanning electron microscope (SEM) is used for characterizing the microstructures of electrode material, and thermogravimetric analysis (TGA) is used for determining the content of active material. The prepared electrode is assembled to be 2032 coin cell under argon atmosphere in the glove box. The result from the electrochemical analysis evidences that the battery fabricated by the cathode with S/CB composite has better cell performance than that fabricated by conventional S cathode.