After the successful electrochemical intercalation of C60 with sodium, we report here the preparation of novel negative electrodes for Na-ion batteries composed by commercial C60:C70 mixture, this being significantly less expensive than pure fullerenes. An optimized solid-state Na-poly(ethylene oxide) electrolyte was used for the battery assembly. While pure C60 electrodes show a strong irreversible behavior after the first discharge, the peculiar disordered crystalline arrangement of C60 and C70 in the mixture, increased by a high-energy ball milling treatment, allows to improve the specific capacity at the first discharge up to 320 mAh/g, as well as the overall reversibility.
Fullerene mixtures as negative electrodes in innovative Na-ion batteries
Milanese C.Investigation
;
2019-01-01
Abstract
After the successful electrochemical intercalation of C60 with sodium, we report here the preparation of novel negative electrodes for Na-ion batteries composed by commercial C60:C70 mixture, this being significantly less expensive than pure fullerenes. An optimized solid-state Na-poly(ethylene oxide) electrolyte was used for the battery assembly. While pure C60 electrodes show a strong irreversible behavior after the first discharge, the peculiar disordered crystalline arrangement of C60 and C70 in the mixture, increased by a high-energy ball milling treatment, allows to improve the specific capacity at the first discharge up to 320 mAh/g, as well as the overall reversibility.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
