期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 47, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202002739
关键词
carbon cloth; flexible supercapacitors; multiwall carbon nanotubes; MXenes
类别
资金
- BK21 plus program through the National Research Foundation (NRF) - Ministry of Education of Korea
- Basic Science Research Program through the National Research Foundation (NRF) - Ministry of Education of Korea [2012R1A6A1029029]
- National Research Foundation under the Ministry of Science and ICT, Republic of Korea [2017M1A2A2087353, 2012M3A6A7054856, 2018R1A2B2006708]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) of the Republic of Korea [2018201010636A]
- Ministry of Trade, Industry AMP
- Energy (MOTIE) of the Republic of Korea [2018201010636A]
- USA AFOSR/AOARD [FA2386-17-1-4081]
- China Scholarship Council (CSC) [201808260017]
- Korea Evaluation Institute of Industrial Technology (KEIT) [2018201010636A] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017M1A2A2087353, 2018R1A2B2006708, 5199991414321] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Owing to their large surface-area-to-volume ratios, 2D titanium carbides and nitrides (MXenes) have emerged as promising materials for energy storage devices. However, poor interlayer and interparticle conductivity of MXenes (due to its anisotropic nature) is a bottleneck for widening their applications. Additionally, the stacked structure of MXene sheets limits the exposed surface area and renders a complex electrolyte diffusion. To address these issues, a unique composite comprising of homogeneously grown multiwall carbon nanotubes (MWCNTs) on carbon cloth (CC)-supported MXene sheets (denoted as MWCNTs-MXene@CC) is proposed. The MWCNTs-MXene@CC reveal the synergistic combination of exfoliated large surface area and excellent conductivity. Consequently, the fabricated electrode exhibits a specific capacitance of 114.58 mF cm(-2) at a discharge current of 1 mA cm(-2), while maintaining high retention after 1.6 x 10(4) cycles at 10 mA cm(-2). Such high performance of the composite structure is attributed to the superb interlayer and interparticle conductivity imparted by the grown MWCNTs. Furthermore, the grown MWCNTs also serve as the interlayer pillar in MXene sheets, thus preventing the spontaneous collapse of the latter. The approach can be extended to other electrocatalyst systems in which ion transport and electrolyte diffusion need to be addressed simultaneously.
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