Core@shell Bi2S3@Bi2O3 composites with custard apple seed-derived carbon as a high-performance anode material for sodium-ion batteries

Improved electrochemical performance of Bi 2 S 3 as an anode in SIBs has been observed by forming a core@shell Bi 2 S 3 @Bi 2 O 3 composite with custard apple seed-derived carbon.