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DOI	10.1039/c8ee03184c
	4.4 v supercapacitors based on super-stable mesoporous carbon sheet made of edge-free graphene walls
	Nomura K.; Nishihara H.; Kobayashi N.; Asada T.; Kyotani T.
发表日期	2019
ISSN	1754-5692
起始页码	1542
结束页码	1549
卷号	12 期号:5
英文摘要	The application of supercapacitors for objectives such as automobiles requires high voltage and high temperature operation, therefore development of new electrode materials that have sufficient stability under such harsh conditions is crucial. In this work, we report the development of seamless mesoporous carbon sheet consisting of continuous graphene walls, which exhibits extraordinarily high stability under high voltage and high temperature conditions. The sheet contains very few carbon edge sites (only 4% of the number present in conventional activated carbons) despite its high specific surface area (1500 m2 g-1), and it is possible to use it to assemble symmetric supercapacitors with excellent stability under 3.5 V@60 °C and 4.4 V@25 °C conditions, even using a conventional electrolyte (1 M Et3MeNBF4/propylene carbonate). Moreover, high-voltage operation at 4.4 V results in a 2.7 times higher energy density compared to that achieved using conventional activated carbons. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Activated carbon; Electrolytes; Graphene; High temperature operations; Edge sites; Electrode material; High specific surface area; High temperature condition; High voltage; High-voltage operation; Higher energy density; Mesoporous carbon; Supercapacitor; carbon; electrical conductivity; electrode; electronic equipment; high temperature; nanocomposite; surface area
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162701
作者单位	Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Apba-ku Sendai, 980-8577, Japan; TOC Capacitor Co. Ltd, 1525 Okaya, Nagano, 394-0001, Japan
推荐引用方式 GB/T 7714	Nomura K.,Nishihara H.,Kobayashi N.,et al. 4.4 v supercapacitors based on super-stable mesoporous carbon sheet made of edge-free graphene walls[J],2019,12(5).
APA	Nomura K.,Nishihara H.,Kobayashi N.,Asada T.,&Kyotani T..(2019).4.4 v supercapacitors based on super-stable mesoporous carbon sheet made of edge-free graphene walls.Energy and Environmental Science,12(5).
MLA	Nomura K.,et al."4.4 v supercapacitors based on super-stable mesoporous carbon sheet made of edge-free graphene walls".Energy and Environmental Science 12.5(2019).