Rational regulation ultra-microporous structure size for enhanced potassium ion storage performance

doi:10.1016/j.electacta.2021.138141

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Rational regulation ultra-microporous structure size for enhanced potassium ion storage performance
	Liu, Jian 1; Kong, Ling-Bin 1,2
刊名	ELECTROCHIMICA ACTA
	2021
卷号	378
关键词	Ultra-microporous carbon Pore size NH4F Potassium-ion hybrid capacitors
ISSN号	0013-4686
DOI	10.1016/j.electacta.2021.138141
英文摘要	The traditional views consider that the interlayer spacing is the major factor controlling battery performance due to the intercalation mechanism, but we find that the pore size of porous carbon in potassium ion storage is the most important factor determining battery electrochemical performance, because the adsorption mechanism occupies the leading position in the process of contributing energy. Herein, we prepare the short-range order ultra-microporous carbon (SROM) through physical grinding following a pyrolysis method. The optimized SROM-15 as anodes in the potassium-ion batteries delivers a remarkable reversible capacity of 264.2 mA h g(-1) at 100 mA g(-1) after 100 cycles, superior rate capacity (149.1 mA h g(-1) at 5 A g(-1)), and excellent cycling life. The electrochemical properties of SROM-15 are better than most reported carbon materials. This experiment has demonstrated that when the pore size is adjusted to 0.84 nm, the specific capacity and K+ diffusion coefficient of SROM are the largest. In addition, the potassium-ion hybrid capacitors fabricated using SROM-15 anodes and corn stalk-derived activated carbons cathodes display outstanding specific energy of 50.6 W h kg(-1) at specific power of 4500 W kg(-1). (C) 2021 Elsevier Ltd. All rights reserved.
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000638027900009
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148218]
专题	石油化工学院材料科学与工程学院
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jian,Kong, Ling-Bin. Rational regulation ultra-microporous structure size for enhanced potassium ion storage performance[J]. ELECTROCHIMICA ACTA,2021,378.
APA	Liu, Jian,&Kong, Ling-Bin.(2021).Rational regulation ultra-microporous structure size for enhanced potassium ion storage performance.ELECTROCHIMICA ACTA,378.
MLA	Liu, Jian,et al."Rational regulation ultra-microporous structure size for enhanced potassium ion storage performance".ELECTROCHIMICA ACTA 378(2021).