Lignin-based Materials for Energy Conversion and Storage Devices Binders for LIBs
Date of this Version
In Sustainability Engineering (CRC Press 2023), ISBN 9781003167693
Proton exchange membrane fuel cells, rechargeable Li-/Na-ion batteries (LIBs), redox flow batteries, and supercapacitors are the most prominent energy conversion and storage devices that use electrochemistry to generate electricity in an eco-friendly manner. Rechargeable LIBs are currently dominating the market for powering electric vehicles, portable electronics, and smart grids. While poly(vinylidene fluoride)-based binders could not, with the phenolic groups, lignin acted like a free-radical scavenger and terminated the free-radical chain reaction which helped to suppress the oxidative decomposition of the electrolyte. With a lignin-based binder, this battery showed high capacity retention of 94.1% after 1,000 cycles. Lignocellulosic biomass or lignin can be beneficial as low-cost but efficient carbonaceous, and redox-active, materials for supercapacitors. This is apparent in the comparison of specific capacitance of lignin- and non-lignin-based electrodes.