Solid-State Electrolytes

Solid-state electrolytes (SSEs) replace flammable liquid electrolytes with an ion-conducting solid, enabling lithium-metal and sodium-metal cells with intrinsically safer thermal behavior and a wider electrochemical window. This collection groups the SSE chemistries we stock for coin-cell screening, pellet pressing, and small-format ASSB prototyping, organized by the three families a researcher actually chooses between: oxide ceramics, sulfide superionics, and polymer hosts.

Oxide ceramics

Rigid, air-stable, and chemically robust against lithium metal in the right family. We stock garnet-type LLZO derivatives such as LLZTO (Li6.4La3Zr1.4Ta0.6O12) and dual-doped LLZTNO, plus NASICON-type LATP (Li1.3Al0.3Ti1.7P3O12) for lithium and NZSPO (Na3Zr2Si2PO12) for sodium-ion work. Garnets pair best with Li metal anodes; LATP delivers high room-temperature conductivity but is reduced by Li metal, so it is typically used with a buffer layer or in hybrid stacks. NZSPO is the standard NASICON host for Na+ transport in solid-state sodium cells. Available as powders for sintering and as pre-pressed pellets for direct coin-cell assembly.

Sulfide superionics

The highest room-temperature Li+ conductivities in this collection sit here. Argyrodite-type Li6PS5Cl (LPSC) and the mixed-halide variant Li5.4PS4.4ClBr0.6 (LPSCB) are the workhorses for cold-pressed bulk-type ASSBs, while Li7P3S11 from the thio-LISICON system reaches comparable conductivities at low processing temperatures. Sulfides are soft enough to densify by uniaxial pressing without sintering, but they are moisture-sensitive and must be handled in a dry glovebox. Use them when you need liquid-electrolyte-class conductivity in an all-solid stack.

Halide electrolytes

A newer family bridging oxides and sulfides. Li3YCl6 (LYC) and Li2ZrCl6 (LZC) offer wide oxidative stability, making them well suited as catholyte layers against high-voltage oxide cathodes. LZC adds better humidity tolerance and lower raw-material cost than yttrium-based analogues.

Polymer hosts

For flexible cells and lithium-metal interlayers we stock PEO powder, PEGDME, and PDMS. PEO is the reference polymer host; PEGDME serves as a plasticizer for gel polymer electrolytes (GPEs) and as a Li-S additive; PDMS supports single-ion conducting designs where backbone segmental motion drives Li+ transport.

If you are building an oxide-cathode ASSB, start with the sulfide argyrodites or halides as the catholyte; for Li-metal symmetric and full cells, go to the garnet options; for sodium-ion solid-state work, use NZSPO. For liquid and gel formulations, see Liquid Electrolytes and Electrolyte Additives.