%0 Journal Article
%A Bergfelt, Andreas
%A Hernández, Guiomar
%A Mogensen, Ronnie
%A Lacey, Matthew J.
%A Mindemark, Jonas
%A Brandell, Daniel
%A Bowden, Tim Melander
%D 2020
%T Mechanically Robust Yet Highly Conductive Diblock
Copolymer Solid Polymer Electrolyte for Ambient Temperature Battery
Applications
%U https://acs.figshare.com/articles/journal_contribution/Mechanically_Robust_Yet_Highly_Conductive_Diblock_Copolymer_Solid_Polymer_Electrolyte_for_Ambient_Temperature_Battery_Applications/11608338
%R 10.1021/acsapm.9b01142.s001
%2 https://ndownloader.figshare.com/files/21009708
%K polymer electrolyte
%K Conductive Diblock Copolymer
%K conductivity
%K Ambient Temperature Battery Applications
%K transference number
%K 300 cycles
%K BCT
%K Polymer Electrolyte
%K load-bearing constructions
%K 0.2 GPa
%K next-generation all-solid-state batteries
%K SPE
%K storage modulus
%K electrolyte material
%K benzyl methacrylate
%K Mechanically Robust
%X In
this paper we present a solid polymer electrolyte (SPE) that
uniquely combines ionic conductivity and mechanical robustness. This
is achieved with a diblock copolymer poly(benzyl methacrylate)-poly(ε-caprolactone-r-trimethylene
carbonate). The SPE with 16.7 wt % lithium bis(trifluoromethanesulfonyl)imide
(LiTFSI) showed the highest ionic conductivity (9.1 × 10–6 S cm–1 at 30 °C) and apparent
transference number (T+) of 0.64 ± 0.04. Due to the employment of the benzyl methacrylate
hard block, this SPE is mechanically robust with a storage modulus
(E′) of 0.2 GPa below 40 °C, similar
to polystyrene, thus also making it a suitable material for load-bearing
constructions. The cell Li|SPE|LiFePO4 is able to cycle
reliably at 30 °C for over 300 cycles. The promising mechanical
properties, desired for compatibility with Li-metal, together with
the fact that BCT is a highly reliable electrolyte material makes
this SPE an excellent candidate for next-generation all-solid-state
batteries.
%I ACS Publications