Soft Template-Assisted Fabrication of Mesoporous Graphenes for High-Performance Energy Storage Systems
SCIE
SCOPUS
- Title
- Soft Template-Assisted Fabrication of Mesoporous Graphenes for High-Performance Energy Storage Systems
- Authors
- Kim, Keon-Woo; Kim, Jun; Choi, Chungryong; Yoon, Hyeong Keon; Go, Myeong Cheol; Lee, Jaeyong; Kim, Jin Kon; Seok, Hyunho; Kim, Taesung; Wu, Kaibin; Kim, Se Hyun; Kim, Yong Min; Kwon, Jin Han; Moon, Hong Chul
- Date Issued
- 2022-01
- Publisher
- American Chemical Society
- Abstract
- © 2022 American Chemical Society.Graphene is a promising active material for electric double layer supercapacitors (EDLCs) due to its high electric conductivity and lightweight nature. However, for practical uses as a power source of electronic devices, a porous structure is advantageous to maximize specific energy density. Here, we propose a facile fabrication approach of mesoporous graphene (m-G), in which self-assembled mesoporous structures of poly(styrene)-block-poly(2-vinylpyridine) copolymer (PS-b-P2VP) are exploited as both mesostructured catalytic template and a carbon source. Notably, the mesostructured catalytic template is sufficient to act as a rigid support without structural collapse, while PS-b-P2VP converts to graphene, generating m-G with a pore diameter of ca. 3.5 nm and high specific surface area of 186 m2/g. When the EDLCs were prepared using the obtained m-G and ionic liquids, excellent electrochemical behaviors were achieved even at high operation voltages (0 ∼3.5 V), including a large specific capacitance (130.2 F/g at 0.2 A/g), high-energy density of 55.4 W h/kg at power density of 350 W/kg, and excellent cycle stability (>10,000 cycles). This study demonstrates that m-G is a promising material for high-performance energy storage devices.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/117854
- DOI
- 10.1021/acsami.2c12948
- ISSN
- 1944-8244
- Article Type
- Article
- Citation
- ACS Applied Materials and Interfaces, vol. 14, no. 41, page. 46994 - 47002, 2022-01
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