Polymerized ionic liquid diblock copolymer as solid-state electrolyte and separator in lithium-ion battery Academic Article uri icon


  • 2016 Elsevier Ltd A polymerized ionic liquid diblock copolymer (PILBCP-TFSI), poly(MMA-b-MUBIm-TFSI), consisting of an ionic liquid monomer, (1-[(2-methacryloyloxy)undecyl]-3-butylimidazolium bis(trifluoromethane)sulfonamide) (MUBIm-TFSI), and a non-ionic monomer, methyl methacrylate (MMA), was synthesized via reverse addition fragmentation chain transfer polymerization followed by anion exchange metathesis. Free standing, mechanically stable transparent solid polymer films were produced with PILBCP-TFSI containing 1M lithium bis(trifluoromethane)sulfonamide in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (Li-TFSI/EMIm-TFSI). The resulting PILBCP-TFSI+Li-TFSI/EMIm-TFSI films possessed ion conductivities from 1 to 10mScm1 from 25C to 105C. Solid-state lithium-ion coin cell batteries were assembled and tested at room temperature with PILBCP-TFSI+Li-TFSI/EMIm-TFSI films as the solid-state electrolyte and separator and resulted in a maximum discharge capacity of 112mAh g1 at 0.1C with a Coulombic efficiency greater than 94% over 100 cycles. For the first time, these results demonstrate the feasibility of PIL block copolymers as solid-state electrolytes and separators in lithium-ion batteries.

published proceedings


altmetric score

  • 3

author list (cited authors)

  • Nykaza, J. R., Savage, A. M., Pan, Q., Wang, S., Beyer, F. L., Tang, M. H., Li, C. Y., & Elabd, Y. A.

citation count

  • 39

complete list of authors

  • Nykaza, Jacob R||Savage, Alice M||Pan, Qiwei||Wang, Shijun||Beyer, Frederick L||Tang, Maureen H||Li, Christopher Y||Elabd, Yossef A

publication date

  • January 2016