Dopamine-Derived Graphite-Like Hard Carbon Materials for High-Performance Li+ Ions Storage


  •  Xianfa Rao    
  •  Baobao Li    
  •  Kuang Lei    
  •  Yitao Lou    
  •  Lixia Zhang    
  •  Longhai Weng    
  •  Longxing Chen    
  •  Xuanbo Shi    
  •  Shengwen Zhong    
  •  Bao Liu    
  •  Li Wang    

Abstract

Graphite anode material is easily powdered under large currents, resulting in a short circuit inside the battery, causing serious safety hazards. Therefore, it is necessary to study a negative electrode material, increase the diffusion channel of lithium ions, increase the layer spacing, reduce the transmission distance, effectively weaken the lithium-ion deposition, and improve the cycle life. A novel organic hard carbon material was prepared by calcining dopamine hydrochloride (DA) at three temperatures. Under the inert atmosphere of 950 °C, the material is fully carbonized, the lattice spacing is 0.367 nm, and it has good lithium-ion transmission activity. After assembling into a battery, after 2000 charge-discharge tests at a high rate of 10C, the charging specific capacity is still 103.3mAh g-1, and the CE remains 101.4%. Dopamine hard carbon anode materials exhibit excellent specific capacity and cycle properties, providing new ideas to support the rapid charging and discharging of hard carbon anode materials.



This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1927-0585
  • ISSN(Online): 1927-0593
  • Started: 2012
  • Frequency: semiannual

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