Realisation of structural battery composite materials
Paper i proceeding, 2015
This paper introduces the concept of structural battery composite materials and their possible
devices and the rationale for developing them. The paper presents an overview of the research
performed in Sweden on a novel structural battery composite material. The research areas addressed
include: carbon fibre electrodes, structural separators, multifunctional matrix materials, device
architectures and material functionalization. Material characterization, fabrication and validation are
also discussed. The paper focuses on a patented battery composite material technology. Here, carbon
fibres are employed as combined negative battery electrodes and reinforcement, coated with a solid
polymer electrolyte working simultaneously as electrolyte and separator with ability to transfer
mechanical loads. The coated fibres are distributed in a conductive positive cathode material on an
aluminium electron collector film. Efficient Li-ion transport between the electrodes is achieved by the
solid polymer electrolyte coating being only a few hundred nanometres thick.
Finally some outstanding scientific and engineering challenges are discussed. Such challenges,
calling for further research are related to manufacture, development of new solid polymer electrolytes
for improved multifunctionality and the lack of material models.