Why are Graphene batteries better than existing Lithium-ion batteries?
Graphene is a two-dimensional material with many advantages due to unique electro-mechanical properties. Relevant for batteries and energy storage are high electrical conductivity, excellent mechanical strength, and thermal conductivity. For example, electrical conductivity of graphene is 100X that of copper and it passes electrons 140X faster than silicon. The excellent fire-retardant properties of graphene make the batteries safe and stable even at very high operating temperature. Pacific Northwest National Laboratory (PNNL) demonstrated that small amounts of graphene can improve power and cycling stability of Li-ion batteries while maintaining high energy storage capacity.
Standard Lithium-ion batteries involve transfer of lithium ions between cathode and anode using a liquid electrolyte. This process takes time, especially during recharging. While Li-ion batteries have grown in power density, not much progress has been made to reduce charging time. In recent years, several technologies have emerged to address this issue. However, the challenge remains in developing an ideal chemistry which offers high energy density, faster charging, longer life, and high safety at a price point acceptable in the market. For example, silicon anode batteries suffer from the formation of a layer of solid-electrolyte interphase (SEI) that depletes the lithium ions significantly reducing batteries energy storage capacity and life.
Graphene batteries perform the best on all these parameters…
Two big advantages of graphene batteries over Li-ion batteries are:
– For the same size and weight, they can store large amount of energy.
They recharge much faster.
However, graphene nanotechnology remains complicated and it’s expensive to produce high quality graphene. At Capattery, team of material scientists has been able to crack the code and produce graphene economically.
Contact us to know more about Capattery’s patented graphene battery technology.