Figure 3.

A) Swelling curve of the OxL/PEGDGE membrane immersed in a liquid electrolyte based on 0.80 m KPF6 in 1 : 1 v/v EC/DEC. B) LSV of a K/GPE/SS cell, studied at room temperature, between −0.2 and 5 V at a scanning rate of 0.1 mV s−1. C) σ values of the lignin‐based GPE as a function of temperature (from 10 °C to 50 °C), fitted with the Arrhenius’ model.