Affiliation:
1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices Wuhan University of Technology No. 122 Luoshi Road Wuhan 430070 P. R. China
2. School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology No. 122 Luoshi Road Wuhan 430070 P. R. China
3. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology No. 122 Luoshi Road Wuhan 430070 P. R. China
4. International School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 P. R. China
Abstract
AbstractOrganic redox‐active molecules with merits of structure diversity and tunable properties are emerging as promising cathodes for the practical usage of potassium‐ion batteries (PIBs). However, the inferior cycle stability and sluggish charge‐carrier mobility are two main drawbacks hindering the practical application of organic cathode materials. Herein, highly conductive inorganic CuS is combined with small molecule‐based redox species (perylene‐3,4,9,10‐tetracarboxylic dianhydride, PTCDA) to form a novel organic–inorganic hybrid cathode (PTCDA/CuS) for PIBs, which could undergo electrochemical‐induced in situ self‐transformation of a sulfur‐linked and Cu2+‐coordinated PTCDA polymer (labeled as Cu@PTCDA‐SP). Benefiting from improved redox sites from activated carbonyl groups, high stability afforded by the sulfur‐bridging, isotropic amorphous nature, and 3D cross‐linked nanosheet morphologies, the resulting Cu@PTCDA‐SP cathode exhibits a high‐rate capacity involving trielectron enolization (vs 2‐electron transformation in PTCDA monomers) and long‐term cycle life (over 2800 cycles at 5 A g−1). This organic–inorganic hybridized cathode is very promising for PIBs. Additionally, the self‐transformation strategy provides new insight into the discovery of more electrochemically induced interaction between organic–inorganic hybrids toward high‐performance secondary batteries.
Funder
National Natural Science Foundation of China
Wuhan University of Technology
Fundamental Research Funds for the Central Universities
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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