Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes

doi:10.1016/j.micromeso.2018.04.001

	Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes
	Habte, Bereket Tsegai 1,2; Jiang, Fangming 1
刊名	MICROPOROUS AND MESOPOROUS MATERIALS
	2018-09-15
卷号	268 页码:69-76
关键词	Cathode materials Microstructure Impedance spectroscopy Equivalent circuit
ISSN号	1387-1811
DOI	10.1016/j.micromeso.2018.04.001
通讯作者	Jiang, Fangming(fm_jiang2000@yahoo.com)
英文摘要	Cathode materials have been the focal point of research in the quest for high-performance secondary battery technology in consumer electronics and electric vehicles. The present work investigates the effect of the microstructural morphology of major cathode materials (LiCoO2, LiMn2O4, and LiFePO4) on the performance of the Li-ion battery related to the charge and species transport. Simulated annealing method (SAM) was implemented to generate a virtual 3D domain of the electrode microstructure using a spherical particles, average radius of 3 and 6 mu m. An equivalent circuit composed of resistance, capacitance and Warburg impedance was used to model the impedance response of the overall electrochemical reaction occur inside a typical battery system. Electrochemical impedance spectroscopy (EIS) results show that the ionic and electronic mobility in the solid electrode and bulk electrolyte were significantly determined by the morphology of the electrode microstructure. Higher porosity microstructures usually tend to have larger solid-electrolyte interface (SEI) area and lower pore tortuosity which improves the ionic diffusivity in solid and electrolyte phase. Furthermore, the Bruggeman's exponent for effective conductivity and diffusivity was derived from geometrical parameters of the reconstructed microstructure. The real and imaginary parts of the impedance were then presented in Nyquist plot on a frequency range of 20 kHz to 10 mHz.
资助项目	Guangdong Science and Technology Department[2016A030313172] ; Guangdong Science and Technology Department[2017B010120003] ; Guangdong Science and Technology Department[2015A030308019] ; Guangdong Key Laboratory of New and Renewable Energy Research and Development[Y607jg1001]
WOS关键词	RECHARGEABLE LITHIUM BATTERIES ; DOUBLE-LAYER CAPACITANCE ; 3-DIMENSIONAL MICROSTRUCTURE ; ELECTRIC VEHICLES ; DIFFUSION IMPEDANCE ; POSITIVE-ELECTRODE ; RENEWABLE ENERGY ; GRAPHITE ANODE ; RANDOM-MEDIA ; CHALLENGES
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000435749300010
资助机构	Guangdong Science and Technology Department ; Guangdong Key Laboratory of New and Renewable Energy Research and Development
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/23620]
专题	中国科学院广州能源研究所
通讯作者	Jiang, Fangming
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Key Lab New & Renewable Energy Res & De, Lab Adv Energy Syst,CAS Key Lab Renewable Energy, Guangzhou, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Habte, Bereket Tsegai,Jiang, Fangming. Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2018,268:69-76.
APA	Habte, Bereket Tsegai,&Jiang, Fangming.(2018).Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes.MICROPOROUS AND MESOPOROUS MATERIALS,268,69-76.
MLA	Habte, Bereket Tsegai,et al."Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes".MICROPOROUS AND MESOPOROUS MATERIALS 268(2018):69-76.