High performance thick cathodes enabled by gradient porosity

doi:10.1016/j.electacta.2021.138105

	High performance thick cathodes enabled by gradient porosity
	Song, Kaifang 1,2; Zhang, Chi 1; Hu, Naifang 1,2; Wu, Xiangkun 1; Zhang, Lan 1,2,3
刊名	ELECTROCHIMICA ACTA
	2021-05-01
卷号	377 页码:7
关键词	Lithium ion battery Thick electrode Gradient porosity Lithium concentration Electrostatic spinning
ISSN号	0013-4686
DOI	10.1016/j.electacta.2021.138105
英文摘要	Thick electrode with high areal loading is considered to be the most valid and practical strategy to improve the energy density of lithium ion batteries, however, its application is limited by serious electrochemical performance deterioration due to the sluggish Li+ transportation. Here, LiNi(0.8)Co(0.1)5Al(0.05)O(2) (NCA) electrodes with areal loading of about 28 mg/cm(2) and gradient porosity are constructed by two preparation methods, doctor-blade coating (DC) and electrostatic spinning (ES). It is revealed that the double-layered electrode (DE), whose bottom layer (close to the current collector) is made by DC and upper layer (closes to the separator) by ES, shows a high specific capacity of more than 150mAh/g un-der 0.5C rate, meantime it demonstrates preferable cycling stability and rate property compared to the other electrodes fabricated by diverse approaches. Experimental and simulation results indicate that the lithium concentration distribution and reaction kinetics of DE is preferable due to the reasonable porosity distribution in favor of electrolyte infiltration and polarization diminution. This finding proposes that the optimization of electrode architecture can improve the property of thick electrodes effectively, which is worth well for more attention in state-of-the-art battery manufacturing processes. (C) 2021 Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2019YFA0705600] ; National Natural Science Foundation of China[22078341] ; National Natural Science Foundation of China[21706262] ; Hebei Natural Science Foundation[B2020103028] ; Key Research and Development Program of Hebei[18214411] ; Ford University Research Program
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000636206300010
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Hebei Natural Science Foundation ; Key Research and Development Program of Hebei ; Ford University Research Program
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/48311]
专题	中国科学院过程工程研究所
通讯作者	Wu, Xiangkun; Zhang, Lan
作者单位	1.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Langfang Inst Proc Engn, Langfang 065001, Peoples R China
推荐引用方式 GB/T 7714	Song, Kaifang,Zhang, Chi,Hu, Naifang,et al. High performance thick cathodes enabled by gradient porosity[J]. ELECTROCHIMICA ACTA,2021,377:7.
APA	Song, Kaifang,Zhang, Chi,Hu, Naifang,Wu, Xiangkun,&Zhang, Lan.(2021).High performance thick cathodes enabled by gradient porosity.ELECTROCHIMICA ACTA,377,7.
MLA	Song, Kaifang,et al."High performance thick cathodes enabled by gradient porosity".ELECTROCHIMICA ACTA 377(2021):7.