Effect of microstructure morphology on Li-ion battery graphite anode performance: Electrochemical impedance spectroscopy modeling and analysis

doi:10.1016/j.ssi.2017.11.024

	Effect of microstructure morphology on Li-ion battery graphite anode performance: Electrochemical impedance spectroscopy modeling and analysis
	Habte, Bereket Tsegai 1,2; Jiang, Fangming 1
刊名	SOLID STATE IONICS
	2018
卷号	314 页码:81-91
关键词	Microstructure Simulated annealing method Equivalent circuit Electrochemical impedance spectroscopy
ISSN号	0167-2738
DOI	10.1016/j.ssi.2017.11.024
通讯作者	Jiang, Fangming(jiangfm@ms.giec.ac.cn)
英文摘要	Carbon graphite has received much attention over the last decades as the best candidate for negative Li-ion battery electrodes due to its thermal stability and optimal cycling capability. This paper aims to give a comprehensive account of the effect of microstructure morphology such as porosity, tortuosity, solid-electrolyte interface area and active material particle geometry on the overall performance of an electrode. Simulated annealing method (SAM) was used to reconstruct a virtual microstructure of a graphite anode based on different active material particle configuration. The underlying species transport and reaction kinetics of an electrochemical cell were modeled through an electrical circuit composed of different components. Simulated results show that active material particle geometry directly influences the tortuosity and specific surface area of the microstructure, thus affects the solid and electrolyte phase electronic/ionic mobility. Nyquist plot provided an overall impedance of ionic and electronic diffusion over a frequency range of 0.1 mHz to 20 kHz. The semi-circle in the high-frequency region is associated with charge transfer resistance and dielectric behavior of the solid electrolyte interface (SEI) while the 45 degrees slope at the low-frequency region is a result of lithium diffusion into the solid electrode.
资助项目	Natural Science Foundation of Guangdong Province[2015A030308019] ; Natural Science Foundation of Guangdong Province[2016A030313172] ; Natural Science Foundation of Guangdong Province[2017B010120003] ; Chinese academy of Sciences
WOS关键词	RECHARGEABLE LITHIUM BATTERIES ; ELECTRODES ; INTERCALATION ; RECONSTRUCTION ; LAYER ; TRANSPORT ; CATHODE
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000423889100013
资助机构	Natural Science Foundation of Guangdong Province ; Chinese academy of Sciences
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/23519]
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. Effect of microstructure morphology on Li-ion battery graphite anode performance: Electrochemical impedance spectroscopy modeling and analysis[J]. SOLID STATE IONICS,2018,314:81-91.
APA	Habte, Bereket Tsegai,&Jiang, Fangming.(2018).Effect of microstructure morphology on Li-ion battery graphite anode performance: Electrochemical impedance spectroscopy modeling and analysis.SOLID STATE IONICS,314,81-91.
MLA	Habte, Bereket Tsegai,et al."Effect of microstructure morphology on Li-ion battery graphite anode performance: Electrochemical impedance spectroscopy modeling and analysis".SOLID STATE IONICS 314(2018):81-91.