Alameda, California
Project Term:
12/01/2016 - 05/31/2018

Technology Description:

Sila Nanotechnologies will develop solid-state ceramic lithium batteries with high energy density. Traditional methods using ceramic electrolytes significantly reduces a battery’s volumetric energy density because the materials are relatively bulky. Commercially produced separator membranes are also expensive and thick because of challenges in fabrication and handling of thinner, defect-free solid-state electrolyte membranes. In addition, such membranes are often air sensitive, have low ionic conductivity, and are susceptible to the growth of branchlike metal fibers called dendrites. Unimpeded, dendrites can grow to span the space between the negative and positive electrodes, causing short-circuiting. To overcome these limitations the team proposes a shift in solid-state battery technology: melt-infiltrating of a solid-state electrolyte at moderate temperatures into a porous separator-cathode stack. This reduces cell volume by nearly three times, while resulting in a corresponding increase in energy density and cost-reduction. The result is a product with low cost and high production yield, built on a process similar to conventional organic electrolyte-filling techniques. The equipment for this process will be very similar to what is currently used in Li-ion battery manufacturing, except that it will be slightly modified for operation at elevated temperatures of up to 250-400°C. The use of equipment similar to what is currently used by industry will reduce the risks of technology scale-up.

Potential Impact:

If successful, developments made under the IONICS program will increase the energy storage content for vehicle batteries by about 30% compared to today's Li-ion batteries and significantly reduce battery storage system costs.


IONICS program innovations could contribute to energy storage solutions for transportation and the grid, lessening U.S. dependence on imported oil and improving grid resilience.


A 10% increase in electric vehicle use would reduce US oil consumption by 3% and reduce total US CO2 emissions by 1%.


IONICS program innovations could further establish U.S. businesses as technical leaders in energy storage, encouraging greater use of readily available renewable resources and increasing the competitiveness of electric vehicles.


ARPA-E Program Director:
Dr. Paul Albertus
Project Contact:
Mr. Gene Berdichevsky
Press and General Inquiries Email:
Project Contact Email:


Georgia Institute of Technology
U.S. Army Research Laboratory

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