【摘 要】
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The increasing demand for portable and flexible energy storage devices drives the development of flexible electrodes and electrolytes.The aim of this work is to fabricate the flexible free-standing polyaniline/poly (vinyl alcohol) (PANI/PVA) composite ele
【机 构】
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College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Yingze West Street 79
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The increasing demand for portable and flexible energy storage devices drives the development of flexible electrodes and electrolytes.The aim of this work is to fabricate the flexible free-standing polyaniline/poly (vinyl alcohol) (PANI/PVA) composite electrode with good capacitance performance and shape memory behavior.The electrodes were fabricated by chemical oxidation polymerization of aniline in porous PVA (P-PVA) films.The morphology,electrochemical and mechanical properties of PANI/P-PVA electrodes were studied by scanning electron microscope,cyclic voltammetry,galvanostatic charge-discharge,and tensile test etc.The results revealed that the flexible PANI/P-PVA-1 electrode had good specific capacitance of 173.86 mF cm 2 at 1 mA cm 2,with the capacitance retention of 70.16% after 4000 charge-discharge cycles.Besides,it had excellent heat-induced shape memory effect.The fixed shape could completely recover to its original shape within 10 s at 80 ℃,which is above the glass transition temperature (75.89 ℃) of PANI/P-PVA-1.The comparatively tensile strength(2.86 MPa) and high elongation at break (315.72%) indicated its outstanding flexibility.Up to 200 times folding had no effect on the electrochemical properties.The free-standing polymer electrodes with excellent compre-hensive performance provide potential applications in flexible energy-storage devices,electronic encapsulation and high stretchable electric devices etc.
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