Plasma coating for improved separator performance in Zn-ion batteries, PlaZion

Important results from the project

The project has shown that it is possible to increase the hydrophilicity of polymeric separator materials with plasma. However, the project has identified certain challenges with handling thin and mechanically- and heat-sensitive materials. Using plasma coating to increase the strength of cellulose-based separators has also been evaluated but has proven to be challenging. In the final stage of the project, wet chemical coatings on the separators were also evaluated with some promising results.

Expected long term effects

The project´s results have strongly contributed to the understanding of crucial properties of a functioning separator in Enerpoly´s Zn-ion batteries. In the long run, this will ease the demands placed on commercial players in the production of customized separators optimized for Enerpoly´s Zn-ion batteries. The project has led to a collaboration between a commercial separator manufacturer and Enerpoly where RISE has the opportunity to participate and support with its expertise and resources.

Approach and implementation

The work was initially focused on polymeric separators but was later shifted in the project to cellulose-based separators due to a change in the production process at Enerpoly. RISE has been responsible for most of the development work, while Enerpoly has evaluated modified separators electrochemically. The collaboration between project partners worked painlessly. A close dialogue has been held, including several project meetings.