Fabrication of highly porous carbon as sulfur hosts using waste green tea bag powder for lithium-sulfur batteries

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• 作者：Seung-Deok Seo^a ; Changhoon Choi^a ; Byung-Kook Kim^b ; Dong-Wan Kim^a ; ^{dwkim1@korea.ac.kr}
• 关键词：A. Activated carbon ; B. Alkali activation ; C. Large surface area ; D. Sulfur host ; E. Waste green tea bag
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：2836-2841
• 全文大小：1461 K
• 卷排序：43

文摘

An activated carbon (AC) was synthesized via pyrolysis of waste green tea bag powder at 600 °C and subsequent activation of the carbonized powder by KOH at 800 °C. The AC powder exhibited an irregular particle size but a large specific surface area and pore volume of 2015 m2 g−1 and 0.727 cm3 g−1, respectively, which were significantly enhanced values compared with those of the original waste green tea bag powder. Furthermore, we tested the AC for use as a sulfur host for a lithium–sulfur battery cathode using cyclic voltammetry and galvanostatic charge/discharge cycling.