Giant-miscanthus-derived activated carbon and its application to lithium sulfur batteries
- Authors
- Lim, Geon Hae; Chae, Ji Su; Cha, Young-Lok; Kang, Yun Chan; Roh, Kwang Chul
- Issue Date
- 10월-2020
- Publisher
- SPRINGER JAPAN KK
- Keywords
- Biomass; Activated carbon; Lithium sulfur batteries; Giant miscanthus
- Citation
- CARBON LETTERS, v.30, no.5, pp.477 - 484
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- CARBON LETTERS
- Volume
- 30
- Number
- 5
- Start Page
- 477
- End Page
- 484
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/130429
- DOI
- 10.1007/s42823-019-00117-w
- ISSN
- 1976-4251
- Abstract
- Giant miscanthus (GM) is an Asian grass that can produce biomass in high yields per land area. It can be used as a cathode material in lithium sulfur (Li/S) batteries. Giant-miscanthus-derived activated carbon (GMAC) is prepared via carbonization of GM followed by KOH activation. It is prepared with a large amount of KOH, and thus contained more defects but had a highly porous structure and graphitic cluster lattice. GMAC has a large specific surface area of 3327 m(2)/g and a large total pore volume of 1.86 cm(3)/g. The pore volume served as a storage space for the retention of polysulfides, thereby inhibiting the shuttle effect. When a GMAC-sulfur composite cathode is tested in a Li/S battery, an initial discharge capacity of 1148 mAh/g can be attained at 0.1 C. In a cyclic charge-discharge experiment at 1 C, discharge capacities of 529 mAh/g and 248 mAh/g are observed in the first and 200th cycles, respectively.
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