Published May 18, 2015
| Version v1
Journal article
Probing the failure mechanism of nanoscale LiFePO4 for Li-ion batteries
- 1. Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)
- 2. National Active Distribution Network Technology Research Center, School of Electrical Engineering, Beijing Jiaotong University, 3 Shangyuancun Street, Haidian District, Beijing 100044 (China)
- 3. Energy and Environmental Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352 (United States)
Description
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 and electron energy loss spectroscopy 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 can guide the design and improvement of LiFePO4 cathode for high-energy and high-power rechargeable battery for electric transportation
Additional details
Identifiers
- DOI
- 10.1063/1.4921628;
Publishing Information
- Journal Title
- Applied Physics Letters
- Journal Volume
- 106
- Journal Issue
- 20
- Journal Page Range
- p. 203902-203902.3
- ISSN
- 0003-6951
- CODEN
- APPLAB
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 46108238
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AMORPHOUS STATE; CATHODES; ELECTROCHEMISTRY; ENERGY-LOSS SPECTROSCOPY; IRON COMPOUNDS; LITHIUM COMPOUNDS; LITHIUM ION BATTERIES; NANOSTRUCTURES; OXYGEN; PHOSPHATES; TRANSMISSION ELECTRON MICROSCOPY
- Descriptors DEC
- ALKALI METAL COMPOUNDS; CHEMISTRY; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; ELECTRODES; ELECTRON MICROSCOPY; ELECTRON SPECTROSCOPY; ELEMENTS; ENERGY STORAGE SYSTEMS; ENERGY SYSTEMS; MICROSCOPY; NONMETALS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; SPECTROSCOPY; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2015 AIP Publishing LLC