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Title: Probing the failure mechanism of nanoscale LiFePO{sub 4} for Li-ion batteries

Abstract

LiFePO{sub 4} is a high power rate cathode material for lithium ion battery and shows remarkable capacity retention, featuring a 91% capacity retention after 3300 cycles. In this work, we use high-resolution transmission electron microscopy and electron energy loss spectroscopy to study the gradual capacity fading mechanism of LiFePO{sub 4} materials. We found that upon prolonged electrochemical cycling of the battery, the LiFePO{sub 4} cathode shows surface amorphization and loss of oxygen species, which directly contribute to the gradual capacity fading of the battery. The finding can guide the design and improvement of LiFePO{sub 4} cathode for high-energy and high-power rechargeable battery for electric transportation.

Authors:
; ;  [1];  [2];  [3]; ;  [2]
  1. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)
  2. Energy and Environmental Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352 (United States)
  3. (China)
Publication Date:
OSTI Identifier:
22402481
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 106; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AMORPHOUS STATE; CATHODES; ELECTROCHEMISTRY; ENERGY-LOSS SPECTROSCOPY; IRON COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM ION BATTERIES; NANOSTRUCTURES; OXYGEN; PHOSPHATES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Gu, Meng, Yan, Pengfei, Wang, Chongmin, E-mail: chongmin.wang@pnnl.gov, Shi, Wei, National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, 3 Shangyuancun Street, Haidian District, Beijing 100044, Zheng, Jianming, and Zhang, Ji-guang. Probing the failure mechanism of nanoscale LiFePO{sub 4} for Li-ion batteries. United States: N. p., 2015. Web. doi:10.1063/1.4921628.
Gu, Meng, Yan, Pengfei, Wang, Chongmin, E-mail: chongmin.wang@pnnl.gov, Shi, Wei, National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, 3 Shangyuancun Street, Haidian District, Beijing 100044, Zheng, Jianming, & Zhang, Ji-guang. Probing the failure mechanism of nanoscale LiFePO{sub 4} for Li-ion batteries. United States. doi:10.1063/1.4921628.
Gu, Meng, Yan, Pengfei, Wang, Chongmin, E-mail: chongmin.wang@pnnl.gov, Shi, Wei, National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, 3 Shangyuancun Street, Haidian District, Beijing 100044, Zheng, Jianming, and Zhang, Ji-guang. Mon . "Probing the failure mechanism of nanoscale LiFePO{sub 4} for Li-ion batteries". United States. doi:10.1063/1.4921628.
@article{osti_22402481,
title = {Probing the failure mechanism of nanoscale LiFePO{sub 4} for Li-ion batteries},
author = {Gu, Meng and Yan, Pengfei and Wang, Chongmin, E-mail: chongmin.wang@pnnl.gov and Shi, Wei and National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, 3 Shangyuancun Street, Haidian District, Beijing 100044 and Zheng, Jianming and Zhang, Ji-guang},
abstractNote = {LiFePO{sub 4} is a high power rate cathode material for lithium ion battery and shows remarkable capacity retention, featuring a 91% capacity retention after 3300 cycles. In this work, we use high-resolution transmission electron microscopy and electron energy loss spectroscopy to study the gradual capacity fading mechanism of LiFePO{sub 4} materials. We found that upon prolonged electrochemical cycling of the battery, the LiFePO{sub 4} cathode shows surface amorphization and loss of oxygen species, which directly contribute to the gradual capacity fading of the battery. The finding can guide the design and improvement of LiFePO{sub 4} cathode for high-energy and high-power rechargeable battery for electric transportation.},
doi = {10.1063/1.4921628},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 20,
volume = 106,
place = {United States},
year = {2015},
month = {5}
}