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Now showing items 1 - 7 of 7

  • Cellulose nanofibers/reduced graphene oxide flexible transparent conductive paper

    Gao, Kezheng   Shao, Ziqiang   Wu, Xue   Wang, Xi   Li, Jia   Zhang, Yunhua   Wang, Wenjun   Wang, Feijun  

    The cellulose nanofibers (CNFs) paper exhibit high visible light transmittance, high mechanical strength, and excellent flexibility. Therefore, CNFs paper may be an excellent substrate material for flexible transparent electronic devices. In this paper, we endeavor to prepare CNFs-based flexible transparent conductive paper by layer-by-layer (LbL) assembly using divalent copper ions (Cu2+) as the crosslinking agent. The thickness of the reduced graphene oxide (RGO) active layer in the CNFs paper can be controlled by the cycle times of the LbL assembly. CNFs/[RGO](20) paper has the sheet resistances of similar to 2.5 k Omega/square, and the transmittance of about 76% at a wavelength of 550 nm. Furthermore, CNFs/[ RGO](20) paper inherits the excellent mechanical properties of CNFs paper, and the ultimate strength is about 136 MPa. CNFs-based flexible transparent conductive paper also exhibits excellent electrical stability and flexibility. (C) 2013 Published by Elsevier Ltd.
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  • Paper-based transparent flexible thin film supercapacitors

    Gao, Kezheng   Shao, Ziqiang   Wu, Xue   Wang, Xi   Zhang, Yunhua   Wang, Wenjun   Wang, Feijun  

    Paper-based transparent flexible thin film supercapacitors were fabricated using CNF-[RGO](n) hybrid paper as an electrode material and charge collector. Owing to the self-anti-stacking of distorted RGO nanosheets and internal electrolyte nanoscale-reservoirs, the device exhibited good electrochemical performance (about 1.73 mF cm (2)), and a transmittance of about 56% (at 550 nm).
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  • Graphene-Like 2D Porous Carbon Nanosheets Derived \rfrom Cornstalk Pith for Energy Storage Materials

    Gao, Kezheng   Niu, Qingyuan   Tang, Qiheng   Guo, Yaqing   Wang, Lizhen  

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  • Cellulose nanofibers/multi-walled carbon nanotube nanohybrid aerogel for all-solid-state flexible supercapacitors

    Gao, Kezheng   Shao, Ziqiang   Wang, Xi   Zhang, Yunhua   Wang, Wenjun   Wang, Feijun  

    In recent years, much effort has been dedicated to achieve environmentally friendly, low cost, and excellent performance energy storage devices. In this work, cellulose nanofibers (CNFs)/multi-walled carbon nanotubes (MWCNTs) hybrid aerogels are prepared from CNFs/MWCNTs hydrogels by supercritical CO2 drying using CNFs as an effective, environmentally friendly, and steady dispersant of MWCNTs. All-solid-state flexible supercapacitors are fabricated using CNFs/MWCNTs hybrid aerogel film as the electrode material and charge collector. One-dimensional CNFs can effectively prevent the aggregation of MWCNTs, significantly enhance the re-wettability, and improve the utilization efficiency of the mesopores. Therefore, CNFs/MWCNTs hybrid aerogel film-based all-solid-state flexible supercapacitors exhibit excellent electrochemical properties: the specific capacitance is about 178 F g(-1). The flexible supercapacitors also exhibit excellent cyclic stability. Our work provides a novel method using low cost, and environmentally friendly CNFs to realize the full potential of the MWCNTs in an assembled bulk form. Taking its low cost and environmentally friendliness, CNFs/MWCNTs hybrid aerogel has great potential as the electrode material for all-solid-state flexible supercapacitors.
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  • Cellulose nanofibers/silk fibroin nanohybrid sponges with highly ordered and multi-scale hierarchical honeycomb structure

    Gao, Kezheng   Guo, Yaqing   Niu, Qingyuan   Han, Lifeng   Zhang, Linsen   Zhang, Yong   Wang, Lizhen  

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  • Quaternary ammonium-functionalized carbon dots for sensitive and selective detection of 2,4,6-trinitrophenol in aqueous medium

    Gao, Kezheng   Guo, Yaqing   Niu, Qingyuan   Han, Lifeng   Zhou, Liming   Wang, Lizhen  

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  • Facile fabrication of hierarchical film composed of Co(OH) 2 @Carbon nanotube core/sheath nanocables and its capacitive performance

    Fang, Hua   Chen, Gaoyun   Wang, Lixia   Yan, Ji   Zhang, Linsen   Gao, Kezheng   Zhang, Yongxia   Wang, Lizhen  

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