超级电容器
塔菲尔方程
材料科学
电解质
电容
电极
电化学
复合数
纳米技术
纳米结构
化学工程
插层(化学)
MXenes公司
复合材料
化学
无机化学
物理化学
工程类
作者
Sajjad Hussain,Dhanasekaran Vikraman,Muhammad Taqi Mehran,Muhammad Hussain,Ghazanfar Nazir,Supriya A. Patil,Hyun‐Seok Kim,Jongwan Jung
标识
DOI:10.1016/j.renene.2021.12.065
摘要
Two-dimensional (2D) transition metal chalcogenides (TMDCs) and carbide have validated boundless prospective as multi-functional constituents for high performance energy storing and/or conversion devices. However, pure TMDCs exhibit poor performance for electrochemical applications due to low electrical conductivity, scarce electrochemically active edges and inadequate cycling stability. Therefore, this paper fabricated MXene/WSe2 hybrids with strong interfacial interactions and conductivities using a one-step chemical reaction as electrodes for supercapacitors and hydrogen evolution. Fabricated supercapacitors achieved high specific capacitance = 840 F g−1 at 2 A g−1, with symmetric capacitance = 246 F g−1 at 2 A g−1 for MXene/WSe2 hybrids. Hydrogen evolution achieved low overpotentials = 76 and 62 mV to drive 10 mA cm−2 current with small Tafel slopes = 78 and 84 mV.dec−1 in acid and base media, respectively. 2D and 2D hybrid WSe2 nanoparticle composite embedded MXene scaffolds achieved excellent electron/ion intercalation owing to its distinctive 2D-layered structure, increasing interlayer spacing and retaining large electrode/electrolyte contact to enhance efficiency. Two-dimensional TMDCs/MXene composites were verified as potentially efficient electrode materials for energy storing and exchange uses.
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