Enhanced storage capability by biomass-derived porous carbon for lithium-ion and sodium-ion battery anodes

Efficient electrodes with impressive storage capability and fast ion transfer rate are urgently needed to meet the demand for higher energy/power densities and longer life cycles and large rate powering devices

Jian Hao; Yanxia Wang; Caixia Chi; Jing Wang; Qingjie Guo; Yu Yang; Yao Li; Xiaoxu Liu; Jiupeng Zhao

2018

Scholarcy highlights

  • Efficient electrodes with impressive storage capability and fast ion transfer rate are urgently needed to meet the demand for higher energy/power densities and longer life cycles and large rate powering devices
  • Apple carbon exhibits a high capacity of 1050 mA h g−1, and celery carbon shows the reversible capacities of 990 mA h g−1 at 0.1 A g−1 after the 200th cycle as lithium-ion batteries anodes
  • For sodium-ion batteries, a high capacity of 438 mA h g−1 is obtained after 200 cycles for apple carbon and 451 mA h g−1 for celery carbon
  • Further analysis on the structure characterization and charging curves reveal that celery carbon has a high N content, dilated intergraphene spacing, and an intrinsically hierarchical porous structure, which are capable of reversibly accumulating sodium ions through surface adsorption and sodium intercalation
  • The electrochemical impedance spectroscopy reveals that celery carbon has a low charge-transfer resistance, the enhanced cyclability and rate performance might be attributed to convenient ion diffusion in the electrode

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