MnO 2 -deposited lignin-based carbon nanofiber mats for application as electrodes in symmetric pseudocapacitors.

Autor: Youe WJ; Division of Wood Chemistry & Microbiology, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea. Electronic address: sngkgk@korea.kr., Kim SJ; Division of Wood Chemistry & Microbiology, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea. Electronic address: momoston@korea.kr., Lee SM; Division of Wood Chemistry & Microbiology, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea. Electronic address: lesoomin@korea.kr., Chun SJ; Division of Wood Processing, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea. Electronic address: csj1730@korea.kr., Kang J; Division of Wood Chemistry & Microbiology, National Institute of Forest Science, 57 Hoegiro, Dongdaemun-gu, Seoul 02455, Republic of Korea. Electronic address: excelsior101@korea.kr., Kim YS; Division of Forest Material Science and Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea. Electronic address: yongsikk@kangwon.ac.kr.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2018 Jun; Vol. 112, pp. 943-950. Date of Electronic Publication: 2018 Feb 10.
DOI: 10.1016/j.ijbiomac.2018.02.048
Abstrakt: Low-cost, high-performance electrodes are highly attractive for practical supercapacitor applications. MnO 2 -deposited carbon nanofiber mats (MnO 2 -CNFMs) are prepared for use as binder-free supercapacitor electrodes. MnO 2 is deposited on the mats in situ by hydrothermally decomposing aqueous KMnO 4 , leading to the formation of nanocrystals of MnO 2 . The MnO 2 -CNFM electrode produced with 38.0μmol KMnO 4 (this electrode) shows a high specific capacitance of ~171.6F·g -1 at a scan rate of 5mV·s -1 . Moreover, a symmetric supercapacitor with the electrode exhibits a specific capacitance of 67.0F·g -1 , an energy density of 6.0Wh·kg -1 and a power density of 160W·kg -1 at a special current of 0.1A·g -1 . Further, the symmetric supercapacitor displays excellent cycling stability, retains approximately 99% of the capacitance after 1000cycles. The simplicity and ease of preparation of the MnO 2 -CNFMs as well as their suitability for use in coin-type supercapacitor cells make them ideal for application in cost-effective and high-performance electrodes for supercapacitors.
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Databáze: MEDLINE