Supercapacitor is an energy device that is applicable in numerous fields because of its excellent reversibility, long life and high power density. Nevertheless, its universal use is restricted by the reduced energy storage capacity and its high crossed series compared to batteries. Even with the relatively high-level output and extensive use of supercapacitor, there is still substantial doubt and ambiguity as to their efficiency in general, especially when it is compared to lithium-ion batteries. The inconsistencies are attributable both to the lack of standardization of the test methods and to the certainty of the strength capacity of the supercapacitor after their resistance has been identified. Therefore, in this work, graphene oxide (GO) and polyaniline (PANI) nanocomposite supercapacitor electrode was fabricated and the performance was investigated by means of cyclic voltammetry and galvanostatic charge-discharge analyses. GO was synthesized using improve Hummers method and PANI using oxidative polymerization chemical synthesis. Three different electrode's compositions were prepared using PANI/GO nanocomposite and labelled as PGO30, PGO50 and PGO70. This article will conclude the electrochemical performance of the electrode.From the results, it was found that PGO50 electrode (50% PANI/50% GO) has the best calculated capacitance with 19.71 F/g compared to the other composite electrodes. This may be attributed from the good electrical conductivity distribution of PANI and graphene oxide. The findings of the work may significantly drive the future of supercapacitor electrode from nanocomposite related materials.
In today's automotive industry, many features are added in power window system. For instance, Anti Trap System, with immediate reversal of the window in the event of entrapment. Thus, it gives full and reliable protection for children's hand, neck and any obstacles as well. The aim of this paper is to develop an innovative mechanism to enable the user to control the degree of opening power window position with preset position. This experiment involved design and development of PIC program, electronic circuit design and modification on existing power window mechanism. In this experiment, microcontroller PIC16F877A is applied as a medium to achieve the goal. Generally, it will control the degree opening window whenever the user or motorist required, plus anti-entrapment features on window lifting control system. Therefore the user will be able to open and close the power window within the selected position and feel free while maneuvering their vehicles.
In this study, the electrochemical characteristics of magnetic particle-filled conductive polyaniline-doped graphene oxide nanocomposites (MDiPG) were investigated. The graphene oxide was chemically exfoliated from natural graphite flakes by the modified Hummer's method. The nanocomposite was characterised through thermogravimetric analysis, scanning electron microscopy, transmission electron microscopy and X-ray diffraction. Its electrochemical characteristics were evaluated by cyclic voltammetry and galvanostatic charge/discharge tests. The nanocomposite electrode material was obtained through in situ polymerisation of polyaniline-doped graphene oxide combined with the mixing of a magnetic substance. The supercapacitor cell was composed of symmetric magnetic-derived electrodes, polypropylene separator, and 6M KOH as an electrolyte. The cyclic voltammetry curve study showed a good relation of both materials, where a high specific gravimetric capacitance was achieved at 303 F/g.
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