Highly active nanostructured CoS₂/CoS heterojunction electrocatalysts for aqueous polysulfide/iodide redox flow batteries.

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 S^2-/S_x^2- redox reactions by improving absorptivity of charged ions and promoting charge transfer. The polysulfid

SUBMITTER: Ma D 

PROVIDER: S-EPMC6662769 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature