Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 8, Issue 26, Pages 13351-13363Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta00335b
Keywords
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Funding
- National Natural Science Foundation of China [21875155, 21703185, 51675275, 21473119]
- Suzhou Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Suzhou, China
- Leading Project Foundation of Science Department of Fujian Province [2018H0034]
- Shenzhen Science and Technology Planning Project [JCYJ20170818153427106]
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The poor ionic conductivity and high working temperatures (normally >60 degrees C) of poly (ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) greatly limit their application in all-solid-state batteries. To mitigate these issues, for the first time, we report here an organic polymer filler, hydrolyzed polymaleic anhydride (HPMA), that can greatly suppress PEO crystallinity, enhance the ionic conductivity of PEO-based SPEs (1.13 x 10(-4)S cm(-1)at 35 degrees C) and support battery operation at 35 degrees C. PEO-HPMA SPEs feature high flexibility, incombustibility, wide electrochemical operating window and stability against lithium. The as-derived Li/PEO-HPMA/LiFePO(4)all-solid-state batteries show outstanding rate capability, high reversible capacity and long-term stability up to 1250 cycles. More impressively, the soft-packaged Li/PEO-HPMA/LiFePO(4)cells show high safety under various extreme conditions such as cutting and perforation. The PEO-HPMA SPE-based quasi-solid-state lithium-sulfur batteries are also presented. This work demonstrates a facile approach that unlocks the low-temperature application of PEO SPE-based all-solid-state batteries.
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