Solid Electrolyte Materials
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.
NEI offers its patent-pending, solid electrolyte material – lithium tin phosphorous sulfide (Li10SnP2S12) – along with various custom produced oxide and non-oxide solid electrolyte material compositions (e.g., sulfide-based), as well as a polymer-based solid electrolyte.
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-20 is a solvent-based dispersion fluid designed to be compatible with NANOMYTE® SSE-10 LSPS powder (and other sulfide-based solid electrolyte powders). The material is specially formulated to not react with LSPS and contains proprietary additives with an organic lithium salt, which acts as an ionically conductive binder.
NANOMYTE® H-Polymer is a solid polymer electrolyte specifically designed for lithium-ion battery applications. It is derived from PEO, which has been intensively explored as a solid polymer electrolyte, and has an ionic conductivity of around 5 x 10-5 S/cm at room temperature.
Other Solid Electrolytes
NEI is actively involved in producing different solid electrolyte materials of both oxide and sulfide-based compositions, as well as polymer-based solid electrolytes. 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.