cm9b05090_si_003.mpg (354 kB)
Download filePolymeric Backbone Eutectogels as a New Generation of Hybrid Solid-State Electrolytes
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posted on 2020-04-20, 15:04 authored by Bjorn Joos, Jordi Volders, Ricardo Ribeiro da Cruz, Evelien Baeten, Mohammadhosein Safari, Marlies K. Van Bael, An T. HardyThis
work introduces the polymeric eutectogel (P-ETG) solid composite
electrolytes (SCEs) developed from the encapsulation of a liquid deep
eutectic solvent (DES) electrolyte within a solid amide-based polymer
backbone. Compared to their silica-based eutectogel counterparts,
the P-ETGs can be efficiently processed by means of UV curing from
liquid precursors and possess superior mechanical flexibility. The
P-ETGs are characterized by a good electrochemical stability (up to
4.5 V vs Li) and high ionic conductivity up to 0.78 mS cm–1. The potentiality of P-ETG for application in Li/Li-ion batteries
is substantiated by stable cycling results of Li/P-ETG/LiFePO4 cells over 100 cycles at C/5 to 1C rates. The fire-hazards
analysis reveals the improved safety of P-ETGs in contrast to the
conventional liquid electrolytes (1 M LiPF6 in EC/DEC).