Pore structure modulation and defect engineering of soft carbon@coal-derived hard carbon for enhanced sodium storage application in SIBs

SC coated coal-derived HC composite can be prepared through multiple-step calcination processes. The SC-coated HC composites achieve a reversible capacity of 320 mA h g −1 at 0.01 A g −1 , an ICE of 89%, and commendable cycling stability in SIBs.