Development of High Performance Li-S Based Battery
Navy SBIR FY2015.2

Sol No.: Navy SBIR FY2015.2
Topic No.: N152-093
Topic Title: Development of High Performance Li-S Based Battery
Proposal No.: N152-093-0114
Firm: Physical Sciences Inc.
20 New England Business Center
Andover, Massachusetts 1810
Contact: Christopher Lang
Phone: (978) 689-0003
Web Site:
Abstract: Physical Sciences, Inc. proposes to demonstrate a rechargeable Li-S cell with energy density >600Wh/kg. Phase I testing will demonstrate the efficient, reversible operation of the cell design results in long cycle life. PSI will demonstrate the ability to form a high performance sulfur cathode that maximizes the useable capacity and full cell energy density. PSI will also demonstrate the ability to incorporate novel additives, cell design techniques, and operating protocols to achieve the desired cycling performance. Pouch cell construction will demonstrate the scalability of the proposed technologies and lay the ground work for multi-Ah cell builds in Phase II. A non-flammable electrolyte will be developed and demonstrated in the Li-S cell, offering a safer alternative to the conventional flammable solvent blends. During the option effort, the extended cycling performance of the cells will be determined and the abuse tolerance of the design determined. For the optimal system, a plan will be developed for producing the larger cells necessary for the Phase II prototype demonstration. The Phase II prototype cell construction and testing efforts will highlight the ability to form safe, high energy cells with the developed technology.
Benefits: The technology to be developed could be utilized to enable long-term safe storage and provide on demand power. Some of the commercial applications that can use rechargeable batteries include power sources for emergency transmission signaling devices in airplanes, watercraft and automobiles, reserve power packs for jump starting automobiles, emergency lighting systems in aircraft, ships and buildings and borehole measuring equipment in the oil and gas industry. The system may also be used in stand-by emergency power generators and as a replacement for current power sources employing primary batteries.