CalBattery reports full cell testing on GEN3 Si-graphene anode material shows 525 Wh/kg; triple capacity while lowering battery cost up to 70%
According to independent test results in full cell Li-ion batteries (LIBs), California Lithium Battery’s (CalBattery) new GEN3 silicon-graphene composite anode materials, used with advanced cathode and electrolyte materials, show an energy density of 525 Wh/kg and specific anode capacity of 1,250 mAh/g.
Earlier this year, CalBattery entered into a Work for Others (WFO) program with Argonne National Laboratory to commercialize an advanced Li-ion battery combining ANL’s Si-graphene anode materials with other advanced battery materials into a Very Large Format (400+ Ah) prismatic cell targeting grid-scale storage and EV applications. CalBattery has an option for exclusive and non-exclusive rights to the ANL Si-graphene process. (Earlier post.)
Argonne’s technology entails the use of an advanced gas phase deposition method that embeds nanoscale silicon particles into the graphene layers. This approach overcomes the traditional problems associated with high-energy density anodes, such as massive volume expansion, high first cycle inefficiency and severe capacity fade.
The independent full cell tests cited by the company suggest increases in energy density by around 3 times and specific anode capacity by around 4 times over existing LIBs. Current commercial LIBs have an energy density of between 100-180 Wh/kg and a specific anode capacity of 325 mAh/g.
The key to the new GEN3 battery material is the use of the Argonne silicon graphene process which stabilizes the use of silicon in a lithium battery anode. Although silicon absorbs lithium ten times better than any other anode materials it rapidly deteriorates during charge/discharge cycles. CalBattery has worked at Argonne and other facilities over the past year to develop this new anode material to work in a full LIB cell with multiple cathode and electrolyte materials.
The results of the development program at ANL leads CalBattery to suggest that this advanced anode material could eventually replace conventional graphite based anode materials used in most LIBs manufactured today. The novel composite anode material is suitable for use in combination with a variety of existing and new LIB cathode and electrolyte materials that will help improve overall battery performance and lower LIB cycle cost.
CalBattery is now in the process of commercializing its GEN3 battery anode material. Over the next two years the Company plans:
to produce and sell its si-graphene anode material to global battery and EV OEMs; and
US production of a limited quantity of specialized batteries for high-end applications.
We believe that our new advanced silicon graphene anode composite material is so good in terms of specific capacity and extended cycle life that it will become a graphite anode “drop-in” replacement material for anodes in most lithium-ion batteries over the next 2-3 years.—CalBattery CEO Phil Roberts
CalBattery, a joint venture between California-based CALiB Power and Ionex Energy Storage Systems, is a portfolio start-up company headquartered at the Los Angeles Cleantech Incubator (LACI), which was started by The City of LA and the LA Department of Water and Power in 2011. CalBattery plans to set up silicon graphene anode material and LIB manufacturing operations in the Los Angeles area based on interest in its advanced Li-ion battery material from US and international customers.