The growing demand that electrical devices have placed on battery power sources has increased a thousand-fold in the last 25 years, but battery energy density and capacity has only tripled. Global growth of the electric vehicle (EV) and energy storage markets depends heavily on Lithium-ion batteries becoming more affordable. The use of a silicon anode coupled with other advanced materials, to improve battery density and capacity, is the most promising way to achieve a two third cost reduction. Over the past 10 years an estimated $500m has been invested into developing silicon anode material, but it has yet to be industrially exploited.
CLB Europe’s proprietary silicon-graphene composite anode material SiGrAM is designed for advanced Li-ion batteries. When used as the anode it is able to improve battery life cycle and charge/discharge characteristics by 300% while lowering overall cell costs by up to 70% and reducing size and weight.
SiGrAM’s proprietary Chemical Vapour Deposition (CVD) manufacturing process uses carbon nano-platelets to uniformly embed silicon into graphene in stable structures, that in turn absorb the silicon expansion during battery charging. Such special nano-platelets create both strength and good elastic deformability that maintains its structural integrity for long cycle life.
Results have shown the material to be the most stable silicon anode material known today, able to triple the anode specific capacity. The material will be able to work in a variety of battery applications from consumer electronic devices to electric vehicles to utility energy storage systems.