Work

Novel Manufacturing of Cellulose‐Based Membranes for Energy Storage Devices: Toward a PFAS Free Future

Year: 2025

Type: article

Abstract: Energy storage devices, like redox‐flow batteries and redox‐supercapacitors, generate electrochemical potential by charging redox‐active molecules. A key component in this class of devices is an ion‐selective membrane that prevents redox‐molecule crossover between half‐cells, while allowing small ions to pass with minimal resistance. Conventional membranes often use ‘forever chemicals’ like Per‐fluoroalkyl substances (PFAS), impacting their environmental footprint. This work introduces novel manufacturing methods for membranes made from coatings of cellulose nanofibril on kraft paper for use in these devices. The coating process is optimized to block redox‐active molecules (e.g., alizarin red s and lignosulfonate) and enhance wet ionic conductivity. By refining the cellulose coating with chemical crosslinkers, leakage of redox molecules is reduced by an order of magnitude compared to uncoated kraft paper, without affecting conductivity. The goal is to pave the way for more environmentally friendly membranes in energy storage electrochemical cells. This innovation not only addresses environmental concerns but also the scalability of manufacturing, while maintaining the efficiency and functionality required for the envisioned applications.

Source: Advanced Sustainable Systems

DOI: 10.1002/adsu.202500796

Authors: Ioannis Petsagkourakis, Robert Brooke, Naveed ul Hassan Alvi, Dan Zhao, Johan Erlandsson, Jesper Edberg

Institutions: RISE Research Institutes of Sweden, Linköping University

Language: English

Topic: Advanced battery technologies research

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Responsible consumption and production, Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $4,430