articleNature CommunicationsJan 11, 2022GOLD OA

Single-dispersed polyoxometalate clusters embedded on multilayer graphene as a bifunctional electrocatalyst for efficient Li-S batteries

JLJie LeiXFXiaoxiang FanTLTing LiuPXPan XuQHQing Hou

Xiamen University · Collaborative Innovation Center of Chemistry for Energy Materials

PubMed
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Abstract

Abstract The redox reactions occurring in the Li-S battery positive electrode conceal various and critical electrocatalytic processes, which strongly influence the performances of this electrochemical energy storage system. Here, we report the development of a single-dispersed molecular cluster catalyst composite comprising of a polyoxometalate framework ([Co 4 (PW 9 O 34 ) 2 ] 10− ) and multilayer reduced graphene oxide. Due to the interfacial charge transfer and exposure of unsaturated cobalt sites, the composite demonstrates efficient polysulfides adsorption and reduced activation energy for polysulfides conversion, thus serving as a bifunctional electrocatalyst. When tested in full Li-S coin cell…

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Topics & keywords

Topics
Keywords
  • Electrocatalyst
  • Polyoxometalate
  • Bifunctional
  • Graphene
  • Materials science
  • Nanotechnology
  • Chemistry
  • Electrode
UN Sustainable Development Goals
  • Affordable and clean energy
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