Solid electrolytes conduct lithium ions at room temperature and can potentially replace conventional organic electrolytes, which are flammable and toxic. In addition to drastically improving the safety of the battery, solid state electrolytes allow the use of lithium metal as the anode. This in turn increases the cell voltage and thereby increases the energy density of the battery. Sulfide compounds with high Li-ion conductivity are not commonly available, and as such, the development of solid state electrolyte–based Li-ion batteries has been plagued by the lack of widespread availability of these difficult-to-produce materials. NEI has utilized its extensive background in the synthesis of advanced materials to develop a process for producing sulfide materials in a form that potentially allows them to be used in Li-ion cells.
Currently, NEI offers its patent-pending, solid electrolyte material, lithium tin phosphorous sulfide (Li10SnP2S12), in powder form as well as a dispersion. Additionally, we can custom produce various solid electrolyte material compositions – both oxide and non-oxide (e.g., sulfide-based).
NANOMYTE® SSE-10 (Li10SnP2S12) is a “superionic” solid that conducts lithium-ions at room temperature. The solid electrolyte is designed to eliminate flammability issues associated with currently used liquid electrolytes, while providing high Li-ion conductivity (10-4 to 10-2 S/cm @ RT).
NANOMYTE® SSE-10D is a dispersion of solid electrolyte powder, SSE-10 (Li10SnP2S12), in a solvent that can be cast into flexible tapes, providing more options for cell designers to combine with suitable cathode and anode active materials. SSE-10D also allows limited atmospheric stability to the solid electrolyte particles, which otherwise need to be handled in a controlled environment.
NEI is actively involved in producing different solid electrolyte materials of both oxide and sulfide-based compositions. A long trusted source for custom developed materials used in lithium-ion batteries, NEI is well positioned to reproducibly synthesize small and large quantities of custom solid electrolyte compositions.