Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 46, Pages 25777-25783Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07636
Keywords
high temperature energy devices; quasi solid electrolytes; lithium ion battery; ionic liquied; clay composites; lithium titanate
Funding
- Advanced Energy Consortium (AEC) [BEG10-02]
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Rechargeable batteries capable of operating at high temperatures have significant use in various targeted applications. Expanding the thermal stability of current lithium ion batteries requires replacing the electrolyte and separators with stable alternatives. Since solid-state electrolytes do not have a good electrode interface, we report here the development of a new class of quasi-solid-state electrolytes, which have the structural stability of a solid and the wettability of a liquid. Microflakes of clay particles drenched in a solution of lithiated room temperature ionic liquid forming a quasi-solid system has been demonstrated to have structural stability until 355 degrees C. With an ionic conductivity of similar to 3.35 mS cm(-1), the composite electrolyte has been shown to deliver stable electrochemical performance at 120 degrees C, and a rechargeable lithium battery with Li4Ti5O12 electrode has been tested to deliver reliable capacity for over several cycles of charge-discharge.
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