A soft co-crystalline solid electrolyte for lithium-ion batteries.

Alternative solid electrolytes are the next key step in advancing lithium batteries with better thermal and chemical stability. A soft solid electrolyte, (Adpn)LiPF (Adpn, adiponitrile), is synthesized and characterized that exhibits high thermal and electrochemical stability and good ionic conductivity, overcoming several limitations of conventional organic and ceramic materials. The surface of the electrolyte possesses a liquid nano-layer of Adpn that links grains for a facile ionic conduction without high pressure/temperature treatments.

Solvate sponge crystals of (DMF)NaClO: reversible pressure/temperature controlled juicing in a melt/press-castable sodium-ion conductor.

A new type of crystalline solid, termed "solvate sponge crystal", is presented, and the chemical basis of its properties are explained for a melt- and press-castable solid sodium ion conductor. X-ray crystallography and atomistic simulations reveal details of atomic interactions and clustering in (DMF)NaClO and (DMF)NaClO (DMF = '-dimethylformamide). External pressure or heating results in reversible expulsion of liquid DMF from (DMF)NaClO to generate (DMF)NaClO.

A Self-Binding, Melt-Castable, Crystalline Organic Electrolyte for Sodium Ion Conduction.

The preparation and characterization of the cocrystalline solid-organic sodium ion electrolyte NaClO (DMF) (DMF=dimethylformamide) is described. The crystal structure of NaClO (DMF) reveals parallel channels of Na and ClO ions. Pressed pellets of microcrystalline NaClO (DMF) exhibit a conductivity of 3×10  S cm at room temperature with a low activation barrier to conduction of 25 kJ mol .