Remarkably improving the specific energy of supercapacitor based on a biomass-derived interconnected hierarchical porous carbon by using a newly-developed mixed alkaline aqueous electrolyte with widened operation voltage

doi:10.1016/j.jpowsour.2021.229666

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Remarkably improving the specific energy of supercapacitor based on a biomass-derived interconnected hierarchical porous carbon by using a newly-developed mixed alkaline aqueous electrolyte with widened operation voltage
	Yang, Binbin 1,2; Zhang, Deyi 1,2; She, Wenna 1,2; Wang, Jingruo 1,2; Gao, Shiyao 1,2; Wang, Yi 1,2; Wang, Kunjie 1,2
刊名	Journal of Power Sources
	2021-04-30
卷号	492
关键词	Capacitance Carbon Electrolytes Pore size Porous materials Supercapacitor Alkaline aqueous electrolytes Charge storage capacity Hierarchical porous carbons High power density High specific capacitances Large current density Large specific surface areas Specific capacitance
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2021.229666
英文摘要	Improving the energy density of supercapacitors without sacrificing their large charge storage capacity, high power density, and excellent cycle stability is extremely attractive for researchers. Herein, we develop a mixed alkaline aqueous (MAA) electrolyte with widened operation voltage. Meanwhile, a biomass-derived interconnected hierarchical porous carbon (IHPC) with controlled pore size distribution, ultra-large specific surface area (up to 3463 m2 g−1), and high conductivity (up to 8.7 S cm−1) is prepared to match this electrolyte. The obtained IHPC can stably charge-discharge within 1.3 V and exhibit a high specific capacitance of up to 462 F g−1 in the MAA electrolyte. The symmetrical supercapacitors based on the prepared IHPC and the MAA electrolyte deliver a high specific energy of up to 19.7 Wh kg−1 at a specific power of 203 W kg−1, while a specific energy of 14.5 Wh kg−1 is recorded at a large specific power of 12.2 kW kg−1. Meanwhile, the assembled devices based on the MAA electrolyte exhibit good rate capability and excellent cycle stability, up to 89% of initial specific capacitance is retained even at a large current density of 20 A g−1, and more than 91.4% of initial specific capacitance is retained after 30,000 cycles. © 2021 Elsevier B.V.
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	Elsevier B.V.
WOS记录号	WOS:000635068900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147748]
专题	石油化工学院
作者单位	1.Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China 2.College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Yang, Binbin,Zhang, Deyi,She, Wenna,et al. Remarkably improving the specific energy of supercapacitor based on a biomass-derived interconnected hierarchical porous carbon by using a newly-developed mixed alkaline aqueous electrolyte with widened operation voltage[J]. Journal of Power Sources,2021,492.
APA	Yang, Binbin.,Zhang, Deyi.,She, Wenna.,Wang, Jingruo.,Gao, Shiyao.,...&Wang, Kunjie.(2021).Remarkably improving the specific energy of supercapacitor based on a biomass-derived interconnected hierarchical porous carbon by using a newly-developed mixed alkaline aqueous electrolyte with widened operation voltage.Journal of Power Sources,492.
MLA	Yang, Binbin,et al."Remarkably improving the specific energy of supercapacitor based on a biomass-derived interconnected hierarchical porous carbon by using a newly-developed mixed alkaline aqueous electrolyte with widened operation voltage".Journal of Power Sources 492(2021).