LONDON Fuel-cell materials developer, Bac2, has made substantial conductivity improvements for its patented ElectroPhen conductive polymer.
Independent test have shown that the latest version of the thermoset material, which uses a new curing agent, demonstrates a dramatic improvement in in-plane electrical conductivity to nearly 500 Siemens per centimeter.
The material now comfortably exceeds the US Department of Energy conductivity target of 200 Siemens per centimeter for such materials used to make bipolar plates for fuel cell applications. The target primarily relates to fuel cells for use in automotive applications.
Bac2's (Southampton, England) ElecroPhen raw state conductivity is in the order of 109 (a billion times) more conductive than commonly used resin binders, which means that no post-processing, such as extreme temperature or surface machining, are required.
The ratio of ElecroPhen to graphite resin makes for a tougher plate – essential for automotive usage – and further modification with plasticisers, reinforcers, and conductive fillers enable the composition to be fine-tuned for specific applications and customer requirements.