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作者:

Tang, Qiming (Tang, Qiming.) | Jiang, Qin (Jiang, Qin.) | Wu, Tao (Wu, Tao.) | Wu, Tianhao (Wu, Tianhao.) | Ding, Zhiyu (Ding, Zhiyu.) | Wu, Junwei (Wu, Junwei.) | Yu, Haijun (Yu, Haijun.) (学者:尉海军) | Huang, Kevin (Huang, Kevin.)

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摘要:

Iron-based sulfides have been deemed as an appealing anode material for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) for their high theoretical capacity and low cost. However, their practical application is limited by drastic volume expansion during cycling and low-intrinsic electronic conductivity. In this work, we report a FeS2/Fe7S8-rGO composite synthesized via a facile solvothermal method as an LIB/SIB anode. The FeS2/Fe7S8-rGO anode exhibits an excellent Li-storage capacity of 514 mAh g(-1) at 2.0 A g(-1) after 3000 cycles and a Na-storage capacity of 650 mAh g(-1) at 0.2 A g(-1) after 250 cycles, respectively. The rGO matrix is deemed responsible for providing good electron conduction and alleviating volume expansion during cycling. The electrokinetic analysis confirms a large portion of intercalational pseudocapacitance as a major contribution to the superior rate performance. In situ X-ray diffraction further reveals details of a combined intercalational and conversional Li-ion storage mechanisms in this Fe-sulfide-based anode. Finally, density functional theory calculations suggest that there exists a synergistic effect at the heterointerface between FeS2 and Fe7S8 to promote electrokinetics.

关键词:

iron-based sulfides DFT calculations lithium-ion batteries sodium-ion batteries anode

作者机构:

  • [ 1 ] [Tang, Qiming]Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
  • [ 2 ] [Jiang, Qin]Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
  • [ 3 ] [Ding, Zhiyu]Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
  • [ 4 ] [Wu, Junwei]Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
  • [ 5 ] [Tang, Qiming]Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA
  • [ 6 ] [Wu, Tao]Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA
  • [ 7 ] [Huang, Kevin]Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA
  • [ 8 ] [Wu, Tianhao]Beijing Univ Technol, Coll Mat Sci & Engn, Educ Minist China, Beijing 100124, Peoples R China
  • [ 9 ] [Yu, Haijun]Beijing Univ Technol, Coll Mat Sci & Engn, Educ Minist China, Beijing 100124, Peoples R China
  • [ 10 ] [Wu, Tianhao]Beijing Univ Technol, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China
  • [ 11 ] [Yu, Haijun]Beijing Univ Technol, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

通讯作者信息:

  • 尉海军

    [Wu, Junwei]Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China;;[Huang, Kevin]Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA;;[Yu, Haijun]Beijing Univ Technol, Coll Mat Sci & Engn, Educ Minist China, Beijing 100124, Peoples R China;;[Yu, Haijun]Beijing Univ Technol, Key Lab Adv Funct Mat, Educ Minist China, Beijing 100124, Peoples R China

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来源 :

ACS APPLIED MATERIALS & INTERFACES

ISSN: 1944-8244

年份: 2020

期: 47

卷: 12

页码: 52888-52898

9 . 5 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:169

被引次数:

WoS核心集被引频次: 38

SCOPUS被引频次: 39

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

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