Interfacial Polymetallic Oxides and Hierarchical Porous Core-Shell Fibres for High Energy-Density Electrochemical Supercapacitors

Guan Wu; Ziyang Ma; Xingjiang Wu; Xiaolin Zhu; Zengming Man; Wangyang Lu; Jianhong Xu

doi:10.1002/anie.202203765

Interfacial Polymetallic Oxides and Hierarchical Porous Core-Shell Fibres for High Energy-Density Electrochemical Supercapacitors

Angew Chem Int Ed Engl. 2022 Jul 4;61(27):e202203765. doi: 10.1002/anie.202203765. Epub 2022 May 5.

Authors

Guan Wu^{1

2}, Ziyang Ma³, Xingjiang Wu⁴, Xiaolin Zhu³, Zengming Man^{1

2}, Wangyang Lu^{1

2}, Jianhong Xu⁴

Affiliations

¹ National Engineering Lab for Textile Fiber Materials & Processing Technology, School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China.
² Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing, 312000, P. R. China.
³ State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 210009, P. R. China.
⁴ The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.

PMID: 35426464
DOI: 10.1002/anie.202203765

Abstract

Realizing high energy-density and actual applications of fibre-based electrochemical supercapacitors (FESCs) are pivotal but challenging, as the ability to construct advanced fibres for accelerating charges kinetic diffusion and Faradaic storage remain key bottlenecks. Here, we demonstrate high-performance FESCs based on hetero-structured polymetallic oxides/porous graphene core-sheath fibres, where the large pseudo-active polymetallic oxide (PMO) sheath is uniformly loaded on a hierarchical porous graphene fibre (PGF) core. Due to the abundant micro-/mesoporous pathways, large accessible surface, excellent redox activity and good interface electron conduction, the PMO-PGF possesses high areal capacitance (2959.78 mF cm^-2 ) and manageable Faradaic reversibility in a 6 M KOH electrolyte. Furthermore, the PMO-PGF-based solid-state FESCs present high energy-density (187.22 μ Wh cm^-2 ), long-life cycles (95.8 % capacitive retention after 20 000 cycles), diverse-powered capabilities and actual energy-supply applications.

Keywords: Actual Applications; Core-Shell Fibre Architecture; Electrochemical Capacitors; Polymetallic Oxides; Porous Graphene.

Abstract

Grants and funding