Interfacially Ordered NiCoMoS Nanosheets Arrays on Hierarchical Ti3C2Tx MXene for High-Energy-Density Fiber-Shaped Supercapacitors with Accelerated Pseudocapacitive Kinetics

Xiaotong Mei; Chao Yang; Fangyuan Chen; Yuting Wang; Yang Zhang; Zengming Man; Wangyang Lu; Jianhong Xu; Guan Wu

doi:10.1002/anie.202409281

Interfacially Ordered NiCoMoS Nanosheets Arrays on Hierarchical Ti₃C₂T_x MXene for High-Energy-Density Fiber-Shaped Supercapacitors with Accelerated Pseudocapacitive Kinetics

Angew Chem Int Ed Engl. 2024 Sep 2;63(36):e202409281. doi: 10.1002/anie.202409281. Epub 2024 Jul 19.

Authors

Xiaotong Mei^{1

2}, Chao Yang¹, Fangyuan Chen¹, Yuting Wang^{1

2}, Yang Zhang^{1

2}, Zengming Man^{1

2}, Wangyang Lu^{1

2}, Jianhong Xu³, Guan Wu^{1

2}

Affiliations

¹ National Engineering Lab for Textile Fiber Materials and 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 The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P. R. China.

PMID: 38837579
DOI: 10.1002/anie.202409281

Abstract

Balancing electrochemical activity and structural reversibility of fibrous electrodes with accelerated Faradaic charge transfer kinetics and pseudocapacitive storage are highly crucial for fiber-shaped supercapacitors (FSCs). Herein, we report novel core-shell hierarchical fibers for high-performance FSCs, in which the ordered NiCoMoS nanosheets arrays are chemically anchored on Ti₃C₂T_x fibers. Beneficial from architecting stable polymetallic sulfide arrays and conductive networks, the NiCoMoS-Ti₃C₂T_x fiber maintains fast charge transfer, low diffusion and OH^- adsorption barrier, and stabilized multi-electronic reaction kinetics of polymetallic sulfide. Consequently, the NiCoMoS-Ti₃C₂T_x fiber exhibits a large volumetric capacitance (2472.3 F cm^-3) and reversible cycling performance (20,000 cycles). In addition, the solid-state symmetric FSCs deliver a high energy density of 50.6 mWh cm^-3 and bending stability, which can significantly power electronic devices and offer sensitive detection for dopamine.

Keywords: Core-shell hierarchical fiber; Flexible supercapacitors; Transition polymetallic sulfide nanosheets; Wearable applications.

Abstract

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