Molecules, Journal Year: 2024, Volume and Issue: 29(20), P. 4813 - 4813

Published: Oct. 11, 2024

The commercialization of sodium batteries faces many challenges, one which is the lack suitable high-quality separators. Herein, we presented a novel natural silkworm cocoon-derived separator (SCS) obtained from cocoon inner membrane after simple degumming process. A Na||Na symmetric cell assembled with this can be stably cycled for over 400 h under test conditions 0.5 mA cm−2–0.5 mAh cm−2. Moreover, Na||SCS||Na3V2(PO4)3 full exhibits an initial capacity 79.3 g−1 at 10 C and retention 93.6% 1000 cycles, far exceeded 57.5 42.1% using commercial glass fiber (GFS). structural origin excellent electrochemical performance lies in fact that cationic functional groups (such as amino groups) on proteins de-solvate Na-ions by anchoring ClO4− solvent sheath, thereby enhancing transference number, transport kinetics deposition/dissolution properties Na-ions. In addition, SCS has significantly better mechanical thinness indexes than GFS, and, coupled advantages being natural, cheap, non-polluting degradable, it expected to used commercialized battery material.

Language: Английский