Enhanced ionic conduction in composite polymer electrolytes filled with plant biomass “lignin”

Abstract

Solidification of electrolyte using polymer can contribute to improving safety of battery by preventing leakage of liquid electrolytes and also having easy processing, so many reports have been made recently...

Electrically conducting films prepared from graphite and lignin in pure water

“…The SEM images of LAG films indicate that LAGs with smaller particle sizes have higher densities of LAG particles in the film ( Figures 5B,C ). Adding excess amounts (over several %) of SESC lignin to the polymer electrolyte adversely affects the ion conductivity of the electrolyte ( Liu et al, 2022 ), i.e., structures of the SESC lignin and other lignin derivatives induce insulating characteristics in materials. Therefore, decreasing the area of the SESC-lignin-attached insulating interface on LAG that is inversely proportional to LAG size enhances the conductivity of the LAG film.…”

Designing biomass-integrated solid polymer electrolytes for safe and energy-dense lithium metal batteries

“…Lignin is a biological polymer with a three-dimensional network structure formed by three kinds of phenylpropane units (p-coumaryl alcohol; coniferyl alcohol; sinapyl alcohol) connected by the ether bond and carbon-carbon bond. 88,89 Lignin is the second largest biomass resource in the plant kingdom after cellulose, with an annual global output of 50 million tons.…”

“…Notably, the SESC lignin can absorb free radicals triggered by polymer degradation, and a chemical structure at the end of lignin can be changed by physically mixing SESC lignin with the PEO/ poly(ethylene carbonate) (PEC) electrolyte. 88 The groups generated by the pyrolysis of SESC lignin act as free radical scavengers to inhibit the alkyd bite reaction of PEC chains (Fig. 4(e)) and affect the ionic conductivity of the SPE (Fig.…”

“…This strategy can give full play Reproduced with permission. 88 Copyright 2022, The Royal Society of Chemistry.…”

Renewable lignin and its macromolecule derivatives: an emerging platform toward sustainable electrochemical energy storage

“…(g) Plots of the temperature dependence of ionic conductivity for PEO-lig CE (left) and PC-lig CE (right). Reproduced with permission 96. Copyright 2022, The Royal Society of Chemistry.…”