Journal
GREEN CHEMISTRY
Volume 18, Issue 13, Pages 3796-3803Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6gc00444j
Keywords
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Funding
- National Natural Science Foundation of China [51274239]
- program of China Scholarships Council
- Fundamental Research Funds for the Central Universities of Central South University [2015zzts036]
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Solid polymer electrolyte (SPE)-based lithium sulfur battery offers high energy and safety for new energy vehicles and storage. However, the low room temperature ionic conductivity of the existing SPE limits the battery performance. Herein, a novel SPE film using food grade starch as a host was fabricated. This electrolyte provides exceptional lithium ion transportability with an ionic conductivity of 3.39 x 10(-4) S cm(-1) and lithium ion transference number of 0.80 at 25 degrees C. The application potential of this starch hosted electrolyte was demonstrated by all-solid-state lithium sulfur battery systems presenting the initial discharge capacity of 1442 mA h g(-1), an average discharge capacity of 864 +/- 16 mA h g(-1) at 0.1 C for 100 cycles, 562 +/- 118 mA h g(-1) at 0.5 C for 1000 cycles at room temperature, and 388 +/- 138 mA h g(-1) for 2000 cycles at 2 C and 45 degrees C. This opens a bright route towards realizing energy power and safety with low cost and high sustainability.
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