Probing the failure mechanism of nanoscale LiFePO₄ for Li-ion batteries
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environmental Directorate; Beijing Jiaotong University (China). School of Electrical Engineering, National Active Distribution Network Technology Research Center
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Energy and Environmental Directorate
LiFePO4 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 (HRTEM), energy dispersive x-ray spectroscopy (EDS), and electron energy loss spectroscopy (EELS) to study the gradual capacity fading mechanism of LiFePO4 materials. We found that upon prolonged electrochemical cycling of the battery, the LiFePO4 cathode shows surface amorphization and loss of oxygen species, which directly contribute to the gradual capacity fading of the battery. The finding is of great importance for the design and improvement of new LiFePO4 cathode for high-energy and high-power rechargeable battery for electric transportation.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1208728
- Alternate ID(s):
- OSTI ID: 1226747
- Report Number(s):
- PNNL-SA-109000; APPLAB; 48688
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 20; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
First-Principles Study of the Impact of Grain Boundary Formation in the Cathode Material LiFePO4
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journal | September 2019 |
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