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

作者：Cao, Chen; Li, Yu; Feng, Yiyu; Long, Peng; An, Haoran; Qin, Chengqun; Han, Junkai; Li, Shuangwen; Feng, Wei^*

来源：Journal of Materials Chemistry A, 2017, 5(43): 22519-22526.

DOI：10.1039/c7ta05787c

• SOLID POLYMER
• MEMBRANE
• SYSTEM

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 (sigma(Li+) = 2.67 mS cm(-1)) and transference number (t(Li+) = 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.

• 出版日期2017-11-21
• 单位天津大学