Volume 8 Issue 2
Apr.  2023
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Xi Zhang, Xiaohong Liu, Wei Zhang, Yingze Song. Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries. Green Energy&Environment, 2023, 8(2): 354-359. doi: 10.1016/j.gee.2022.03.006
Citation: Xi Zhang, Xiaohong Liu, Wei Zhang, Yingze Song. Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries. Green Energy&Environment, 2023, 8(2): 354-359. doi: 10.1016/j.gee.2022.03.006

Tunable vacancy defect chemistry on free-standing carbon cathode for lithium-sulfur batteries

doi: 10.1016/j.gee.2022.03.006
  • The defect chemistry is successfully modulated on free-standing and binder-free carbon cathodes for highly efficient Li–S redox reactions. Such rationally regulated defect engineering realizes the synchronization of ion/electron-conductive and defect-rich networks on the three-dimension carbon cathode, leading to its tunable activity for both relieving the shuttle phenomenon and accelerating the sulfur redox reaction kinetics. As expected, the defective carbon cathode harvests a high rate capacity of 1217.8 mAh g-1 at 0.2 C and a superior capacity retention of 61.7% at 2 C after 500 cycles. Even under the sulfur mass loading of 11.1 mg cm-2, the defective cathode still holds a remarkable areal capacity of 8.5 mAh cm-2.

     

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