CAS OpenIR
High performance thick cathodes enabled by gradient porosity
Song, Kaifang1,2; Zhang, Chi1; Hu, Naifang1,2; Wu, Xiangkun1; Zhang, Lan1,2,3
2021-05-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume377Pages:7
AbstractThick 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.
KeywordLithium ion battery Thick electrode Gradient porosity Lithium concentration Electrostatic spinning
DOI10.1016/j.electacta.2021.138105
Language英语
Funding ProjectNational 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 Research AreaElectrochemistry
WOS SubjectElectrochemistry
Funding OrganizationNational 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
WOS IDWOS:000636206300010
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48312
Collection中国科学院过程工程研究所
Corresponding AuthorWu, Xiangkun; Zhang, Lan
Affiliation1.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
Recommended Citation
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.
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