The results are the first under Talga’s UK Government-funded “Safevolt” project - a Talga-led program run in conjunction with consortia partners, Johnson Matthey, the University of Cambridge and manufacturing research group, TWI.
Under Safevolt, Talga is developing a high energy graphene silicon anode product, termed Talnode-Si, targeting significantly higher capacity than state of the art commercial graphite anodes.
Highlights of initial test results include:
- ~50% higher reversible capacity (~550mAh/g) than commercial graphite (~350mAh/g)
- Coloumbic efficiency of 99.3% - 99.8%
- 95% reversible capacity (after 45 cycles - tests ongoing)
The test results show Talnode-Si with graphene is effective in stabilizing the silicon as it expands, maintaining battery life while enabling much higher energy density.
Talga Managing Director, Mr Mark Thompson: “We are excited to see further success as we progress development of our next generation of battery products and materials to be produced from our Swedish resources. Talnode-Si will suit the growing demand for Li-ion batteries with higher capacity to extend the range of electric vehicles and work time of portable electronic devices. We are pleased to be at the fore-front of developing a Li-ion anode product that has a fast growing future, and uses both our emerging supplies of graphene and graphite.”
Further cycling tests and optimization of Talnode-Si is underway at Talga’s battery material facility in the Maxwell Center at Cambridge University in the UK. Interim samples are being prepared for delivery to end users in Asia under confidentiality and material transfer agreements.