期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 45, 页码 30912-30919出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp04251a
关键词
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资金
- Engineering and Physical Sciences Research Council (EPSRC)
- Royal Academy of Engineering
- National Physical Laboratory (NPL)
- STFC
- French National Research Agency (ANR) via EQUIPEX grant [ANR-11-EQPX-0031]
- Engineering and Physical Sciences Research Council [EP/M009394/1, EP/N032888/1, EP/K005030/1, 1528603] Funding Source: researchfish
- Science and Technology Facilities Council [ST/K00171X/1, ST/N002385/1] Funding Source: researchfish
- EPSRC [EP/K005030/1, EP/N032888/1, EP/M009394/1] Funding Source: UKRI
- STFC [ST/N002385/1, ST/K00171X/1] Funding Source: UKRI
Catastrophic failure of lithium-ion batteries occurs across multiple length scales and over very short time periods. A combination of high-speed operando tomography, thermal imaging and electrochemical measurements is used to probe the degradation mechanisms leading up to overcharge-induced thermal runaway of a LiCoO2 pouch cell, through its interrelated dynamic structural, thermal and electrical responses. Failure mechanisms across multiple length scales are explored using a post-mortem multiscale tomography approach, revealing significant morphological and phase changes in the LiCoO2 electrode microstructure and location dependent degradation. This combined operando and multi-scale X-ray computed tomography (CT) technique is demonstrated as a comprehensive approach to understanding battery degradation and failure.
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