摘要
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 threedimension 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 of61.7%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).
基金
supported by the National Natural Science Foundation of China(52172239)
Project of State Key Laboratory of Environment-Friendly Energy Materials
Southwest University of Science and Technology(Grant Nos.21fksy24 and 18ZD320304)
Chongqing Talents:Exceptional Young Talents Project(Grant No.CQYC201905041)
Natural Science Foundation of Chongqing China(Grant No.cstc2021jcyj-jqX0031)。