Japan-based materials supplier JSR Corporation and a venture firm linked to US-based advanced ceramics business Coorstek invest in the ionic liquids company, which plans to be the first producer of the battery material in "industrial volumes".

Japan-based materials supplier JSR Corporation and 9th Street Investments, a venture firm linked to US-based advanced ceramics business Coorstek, helped US-based ionic liquids company Boulder Ionics Corporation raise $4.3m on Friday.

JSR and 9th Street were joined in the series A by venture firm Pangaea Ventures, which led the round, as well as venture firm CalCEF Clean Energy Angel Fund, and energy technology investor Protonic Capital.

Boulder Ionics previously raised $240,000 of a planned $260,000 round in February last…