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A sulfonimide-based alternating copolymer as a single-ion polymer electrolyte for high-performance lithium-ion batteries

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Abstract

For the next generation of lithium-ion batteries (LIBs), single Li-ion polymer electrolytes (SPEs) are widely considered an effective substitute to traditional dual-ion electrolytes, due to their ability to restrain the salt concentration gradient and the polarization loss in the cells. A new single-ion conductor with an alternating structure is synthesized by the simple radical copolymerization of lithium 4-styrenesulfonyl(phenyl-sulfonyl)imide and maleic anhydride. Its SPE membrane composite with poly(vinylidene fluoride-co-hexafluoropropylene) exhibits both high lithium ion conductivity (σLi+ = 2.67 mS cm−1) and transference number (tLi+ = 0.98). The full cell with the prepared SPE sandwiched between a LiFePO4 cathode and a Li4Ti5O12 anode shows good cycling stability and rate capability. These results suggest that this novel electrolyte is promising for application in next-generation LIBs.

Graphical abstract: A sulfonimide-based alternating copolymer as a single-ion polymer electrolyte for high-performance lithium-ion batteries

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Publication details

The article was received on 04 Jul 2017, accepted on 15 Sep 2017 and first published on 15 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA05787C
Citation: J. Mater. Chem. A, 2017, Advance Article
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    A sulfonimide-based alternating copolymer as a single-ion polymer electrolyte for high-performance lithium-ion batteries

    C. Cao, Y. Li, Y. Feng, P. Long, H. An, C. Qin, J. Han, S. Li and W. Feng, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA05787C

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