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Journal of colloid and interface science v.512, 2018년, pp.398 - 403   SCI SCIE
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Preparation and characterization of flexible lithium iron phosphate/graphene/cellulose electrode for lithium ion batteries

Wang, Yan    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China   ); He, Zhen-yu    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China   ); Wang, Yao-xuan    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China   ); Fan, Cong    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China   ); Liu, Chen-ren-lang    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China   ); Peng, Qi-ling    (Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621999, PR China   ); Chen, Jin-ju    (State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China  ); Feng, Zhe-sheng  
  • 초록  

    Abstract In this work, a free-standing flexible composite electrode was prepared by vacuum filtration method with LiFePO 4 , graphene and nanofibrillated cellulose (NFC). Compared with the pure LiFePO 4 electrode, the resulting flexible composite (LiFePO 4 /graphene/NFC) electrode showed excellent mechanical flexibility, and possessed an enhanced initial discharge capacity of 151 mA h/g (0.1 C) and a good capacity retention rate with only 5% loss after 60 cycles due to suitable electrolyte wettability at the interface. Furthermore, the NFC and graphene formed a three-dimensional conductive framework, which provided high-speed electron conduction in the composite and reduced electrode polarization during charging-discharging processes. Moreover, the composite electrode could endure bending tests up to 1000 times, highlighting preferable mechanical strength and durability. These results demonstrated that the as-fabricated electrodes could be applied as flexible electrodes with an embedded power supply. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Flexible electrodes .   Graphene .   Nanofibrillated cellulose .   Interface .   Composite materials .   Lithium ion batteries .   Energy storage and conversion.  

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