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Biomass Chemical Engineering ›› 2023, Vol. 57 ›› Issue (6): 1-7.doi: 10.3969/j.issn.1673-5854.2023.06.001

• Research Report • Previous Articles     Next Articles

Preparation and Sodium Storage Properties of Bamboo Hard Carbon

Gaoyue ZHANG1,2,3, Ao WANG1, Hao YING1, Wei XU1, Hao SUN1, Kang SUN1,*(), Jianchun JIANG1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Nanjing 210042, China
    2. School of Energy and Environment, Southeast University, Nanjing 210096, China
    3. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2023-05-06 Online:2023-11-30 Published:2023-11-24
  • Contact: Kang SUN E-mail:sunkang0226@163.com

Abstract:

Bamboo-based hard carbon materials for sodium ion battery anodes were prepared by a two-step method of pre-carbonization combined with high-temperature reforming using bamboo as raw material. The influence of reforming temperature on the structure of hard carbon, and the structure-activity relationship between structure and sodium storage performance were explored. The research results showed that the high refining temperature could shrink the pores to form a closed pore structure and reduce the specific surface area, as well as led to a decrease in the layer spacing. When the refining temperature was 1 400 ℃, the specific surface area of the sample BHC-1400 was 9.2 m2/g, and the layer spacing was 0.375 nm. Its rich closed-pore structure and reasonable interlayer spacing were beneficial to the improvement of sodium storage capacity. BHC-1400 exhibited a reversible sodium storage capacity up to 364.3 mAh/g at a current density of 50 mA/g and an initial Coulomb efficiency of 81.2% as an anode material for sodium-ion batteries. Capacity retention rate keeps at 85% after 5 000 cycles of charging and discharging.

Key words: biomass, hard carbon, sodium ion battery, high temperature refining

CLC Number: