Microstructure reconstruction and impedance spectroscopy study of LiCoO2, LiMn2O4 and LiFePO4 Li-ion battery cathodes
文献类型：期刊论文
| 作者 | Habte, Bereket Tsegai1,2; Jiang, Fangming1
|
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 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. |
| 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 |
| 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研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000435749300010 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Guangdong Science and Technology Department ; Guangdong Key Laboratory of New and Renewable Energy Research and Development |
| 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. |
入库方式： OAI收割
来源：广州能源研究所
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