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Highly active nanostructured CoS2/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries.
Ma, Dui; Hu, Bo; Wu, Wenda; Liu, Xi; Zai, Jiantao; Shu, Chen; Tadesse Tsega, Tsegaye; Chen, Liwei; Qian, Xuefeng; Liu, T Leo.
Affiliation
  • Ma D; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China.
  • Hu B; The Department of Chemistry and Biochemistry, Utah State University, Logan, UT, 84322, USA.
  • Wu W; The Department of Chemistry and Biochemistry, Utah State University, Logan, UT, 84322, USA.
  • Liu X; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China.
  • Zai J; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China. zaijiantao@sjtu.edu.cn.
  • Shu C; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China.
  • Tadesse Tsega T; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China.
  • Chen L; Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, 215123, Suzhou, P. R. China.
  • Qian X; Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 200240, Shanghai, P. R. China. xfqian@sjtu.edu.cn.
  • Liu TL; The Department of Chemistry and Biochemistry, Utah State University, Logan, UT, 84322, USA. leo.liu@usu.edu.
Nat Commun ; 10(1): 3367, 2019 Jul 29.
Article in En | MEDLINE | ID: mdl-31358738
ABSTRACT
Aqueous polysulfide/iodide redox flow batteries are attractive for scalable energy storage due to their high energy density and low cost. However, their energy efficiency and power density are usually limited by poor electrochemical kinetics of the redox reactions of polysulfide/iodide ions on graphite electrodes, which has become the main obstacle for their practical applications. Here, CoS2/CoS heterojunction nanoparticles with uneven charge distribution, which are synthesized in situ on graphite felt by a one-step solvothermal process, can significantly boost electrocatalytic activities of I-/I3- and S2-/Sx2- redox reactions by improving absorptivity of charged ions and promoting charge transfer. The polysulfide/iodide flow battery with the graphene felt-CoS2/CoS heterojunction can deliver a high energy efficiency of 84.5% at a current density of 10 mA cm-2, a power density of 86.2 mW cm-2 and a stable energy efficiency retention of 96% after approximately 1000 h of continuous operation.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nat Commun Journal subject: BIOLOGIA / CIENCIA Year: 2019 Document type: Article
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nat Commun Journal subject: BIOLOGIA / CIENCIA Year: 2019 Document type: Article