首页|Vertical two-dimensional WS2 flakes grown on flexible CNT film for excellent electrochemical performance
Vertical two-dimensional WS2 flakes grown on flexible CNT film for excellent electrochemical performance
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Soft electrochemical actuators that can generate mechanical motions in response to electrical stimuli can be used as artificial muscles in microscale robots.The elec-trode materials are the key component of the electro-chemical actuator because they limit the ion diffusion and accumulation processes and thus affect the deformation in fast response-time and potential engineering applications.Low-dimensional materials,such as one-dimensional(1D)CNT and two-dimensional(2D)vertically stood WS2,are great electrode due to their good electrochemical stability and high surface-to-volume ratios,but show limited performances when being used on their own in the actua-tors because of low reconstruction or low conductivity.A combination of 1D CNT and 2D WS2 could form a heterojunction with both high electrochemical activity and great mechanical stability.Herein,by depositing highly disordered graphene nanosheets(HDGNs)on CNT films and then WS2 on the formed low-dimensional nanocarbon film,a hybrid WS2/HDGN/CNT film was synthesized through a multistep CVD method.Vertically grown WS2 nanosheets were achieved by taking advantage of HDGNs which limits CNTs sliding.So,the volume expansion caused by the transition from WO3 to WS2 can force the vertical growth of WS2.This hybrid film shows excellent electrochemical properties,such as high specific capaci-tance and high rate performance.Soft actuators based on the WS2/HDGN/CNT films show good actuating perfor-mance,including stability and reconfigurability.
School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,China
Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Division of Advanced Materials,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China
Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou 215009,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaSuzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(SINANO)
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