Battery Technology Development

CFD Research Corporation is developing new battery technologies particularly in the areas of thermal batteries and next generation lithium ion batteries.

Thermal batteries are unique single-use devices which are inactive at room temperature as the molten salt used as the electrolyte is in a solid state with low ionic conductivity. This low conductivity phase of the electrolyte promotes the ability for this type of battery to be stored for long times (>10 years) with practically no capacity fade and subsequent activation can be done within seconds or less via internal pyrotechnics to generate thermal energy to melt the electrolyte.

Batteries

CFDRC's novel nano-structured anode materials enhance electronic conductivity and Li+ storage capacity. The concept is based on the application of nano-structured silicon composite material for the battery anode. Silicon has the highest known capacity for lithium storage of 4.2 Ah/g which is >10x higher than graphite and other traditional anode materials. Furthermore, Silicon has a low discharge potential. However, its usage has been limited due to its 400% volume change with Li+ intercalation, in which such expansion causes strong mechanical strain in the material resulting in mechanical damage of the electrode material. CFDRC overcomes this problem by constructing nanometer scale anode materials with a carbon nanotube core and silicon shell. This provides enhanced electronic conductivity and better mechanical stability.

Through a combination of simulation and experimental methods we have been advancing this new technology for the thermal battery application and plan to apply the same principles to other lithium-ion battery systems.

Contact us today to discuss the use and development of these technologies.