A nanoporous nitrogen-doped graphene for high performance lithium sulfur batteries

A nanoporous N-doped reduced graphene oxide（p-N-rGO） was prepared through carbothermal reaction between graphene oxide and ammonium-containing oxometalates as sulfur host for Li-S batteries.The p-N-rGO sheets have abundant nanopores with diameters of 10-40 nm and the nitrogen content is 2.65 at%.Whe...

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Bibliographic Details
Published inChinese chemical letters Vol. 28; no. 2; pp. 412 - 416
Main Authors Liu, Shuang-Ke, Hong, Xiao-Bin, Li, Yu-Jie, Xu, Jing, Zheng, Chun-Man, Xie, Kai
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.02.2017
Subjects
High performance
Lithium sulfur battery
Nitrogen doping
Porous graphene
Sulfur cathode
High performance
Porous graphene
Sulfur cathode
Nitrogen doping
Lithium sulfur battery
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Summary:A nanoporous N-doped reduced graphene oxide（p-N-rGO） was prepared through carbothermal reaction between graphene oxide and ammonium-containing oxometalates as sulfur host for Li-S batteries.The p-N-rGO sheets have abundant nanopores with diameters of 10-40 nm and the nitrogen content is 2.65 at%.When used as sulfur cathode,the obtained p-N-rGO/S composite has a high reversible capacity of 1110mAhg^-1 at 1C rate and stable cycling performance with 781.8 mAhg-1 retained after 110 cycles,much better than those of the rGO/S composite.The enhanced electrochemical performance is ascribed to the rational combination of nanopores and N-doping,which provide efficient contact and wetting with the electrolyte,accommodate volume expansion and immobilize polysulfides during cycling.
Bibliography:Lithium sulfur battery Sulfur cathode Porous graphene Nitrogen doping High performance
A nanoporous N-doped reduced graphene oxide（p-N-rGO） was prepared through carbothermal reaction between graphene oxide and ammonium-containing oxometalates as sulfur host for Li-S batteries.The p-N-rGO sheets have abundant nanopores with diameters of 10-40 nm and the nitrogen content is 2.65 at%.When used as sulfur cathode,the obtained p-N-rGO/S composite has a high reversible capacity of 1110mAhg^-1 at 1C rate and stable cycling performance with 781.8 mAhg-1 retained after 110 cycles,much better than those of the rGO/S composite.The enhanced electrochemical performance is ascribed to the rational combination of nanopores and N-doping,which provide efficient contact and wetting with the electrolyte,accommodate volume expansion and immobilize polysulfides during cycling.
11-2710/O6
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2016.10.038