Abnormal self-discharge in lithium-ion batteries
- Seong, Won Mo
- Park, Kyu-Young
- Lee, Myeong Hwan
- Moon, Sehwan
- Oh, Kyungbae
- Park, Hyeokjun
- Lee, Sechan
- Kang, Kisuk
DOIAbstract
Lithium-ion batteries are expected to serve as a key technology for large-scale energy storage systems (ESSs), which will help satisfy recent increasing demands for renewable energy utilization. Besides their promising electrochemical performance, the low self-discharge rate (<5% of the stored capacity over 1 month) of lithium-ion batteries is one of their most significant advantages for ESSs. Herein, contrary to conventional belief, we report that the self-discharge of LIBs can be abnormally accelerated when the battery has been exposed even to a routine short-term thermal exposure. We demonstrate that this thermal 'history' in addition to the temperature itself is memorized in the battery and accelerates the self-discharge rate. The serie...
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