High-specific-energy aqueous supercapacitor with extended operating potential using trichloroacetic acid electrolyte

doi:10.1016/j.jpowsour.2022.231211

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	High-specific-energy aqueous supercapacitor with extended operating potential using trichloroacetic acid electrolyte
	Zhang, Deyi 1,2; She, Wenna 1,2; Wang, Jingruo 1,2; Gao, Shiyao 1,2; Yang, Biao 1,2; Men, Xianxing 1,2; Wang, Kunjie 1,2; Han, Zhiyong 2; Chen, Xuefu 2
刊名	Journal of Power Sources
	2022-04-15
卷号	527
关键词	Capacitance Carbon Durability Electrolytes Porous materials Trichloroacetic acid Acid electrolytes Carbon-based Efficient strategy Energy density Hierarchical porous carbons High specific capacitances High specific surface area Specific capacitance Specific energy Symmetrics
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2022.231211
英文摘要	Extending the operating potential of electrolytes is an efficient strategy to improving the energy density of aqueous supercapacitors. In this work, trichloroacetic acid (TCA) is firstly developed to be an efficient acid electrolyte with extended operating potential to improve the energy density of the aqueous carbon-based supercapacitors. Meanwhile, a hierarchical porous carbon (HPC) with a high specific surface area of up to 3356 m2 g−1 derived from inedible fruits of flowering plums is prepared to match the newly developed TCA electrolyte. The prepared HPC exhibits a high specific capacitance of up to 460 F g−1 in the TCA electrolyte at 1 A g−1. The symmetric supercapacitor device based on the prepared HPC and TCA electrolyte can stably work at 1.3 V with excellent cycle durability, more than 95.4% of initial specific capacitance is reserved after 20000 cycles. Meanwhile, high specific energy of 18.8 Wh kg−1 is delivered at 203 W kg−1, which value is 2.38 times higher than the device using H2SO4 electrolyte. Energy density of the acidic aqueous supercapacitors can be dramatically improved by employing the newly developed TCA electrolyte while the large power density and excellent cycle durability of carbon-based supercapacitors can be well retained. © 2022 Elsevier B.V.
语种	英语
出版者	Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158045]
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	Zhang, Deyi,She, Wenna,Wang, Jingruo,et al. High-specific-energy aqueous supercapacitor with extended operating potential using trichloroacetic acid electrolyte[J]. Journal of Power Sources,2022,527.
APA	Zhang, Deyi.,She, Wenna.,Wang, Jingruo.,Gao, Shiyao.,Yang, Biao.,...&Chen, Xuefu.(2022).High-specific-energy aqueous supercapacitor with extended operating potential using trichloroacetic acid electrolyte.Journal of Power Sources,527.
MLA	Zhang, Deyi,et al."High-specific-energy aqueous supercapacitor with extended operating potential using trichloroacetic acid electrolyte".Journal of Power Sources 527(2022).