硅基電纜式電極鋰電性能及柔性平板纖維超級(jí)電容器件研究
[Abstract]:The discovery of microcosmic world makes science and technology enter a new chapter, and the development of nanotechnology makes the related fields radiate new vitality. Nanomaterials, which are produced by the combination of nanotechnology and material science, have been widely concerned by the scientific community. The era of mobile interconnection and electric vehicle have put forward higher requirements for energy storage devices. It is the key to find new energy storage materials with better performance and construct a more suitable device structure. With the development of wearable mobile digital products and flexible electronic devices, the research and development of flexible energy storage devices has attracted much attention. In this thesis, we have studied the new structural electrodes formed by silicon-based nanomaterials and the new flexible supercapacitor devices. The main contents are as follows: (1) using carbon cloth as substrate, Si@SiO2 nanowires with core-shell structure were synthesized by chemical vapor deposition (CVD). The nanowires were wound on the fiber to form a new type of silicon-based electrode with cable structure. (2) the lithium battery is packaged and tested directly with the negative electrode of cable structure. The semi-battery based on the electrode shows high capacity, good rate performance and excellent cycle stability. The whole battery based on this electrode also shows excellent energy storage performance, and easily lights up LED lamp beads of different colors to show its practical performance. (3) the electrodes of ZnCo2O4 nanowire array composite carbon fiber were arranged on PET, and the silver paste was fixed to form a new type of flexible plate integrated fiber supercapacitor. This flexible capacitor device shows high efficiency, long life and excellent flexibility. Moreover, it is found that there is an enhanced distributed capacitance effect in the study of the effect of the number of electrode roots on the performance of capacitors. This discovery plays an important role in promoting the research of this kind of devices, and provides a reference for the design of capacitor devices with more reasonable structure, size and capacity in the future.
【學(xué)位授予單位】:華中科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TM53
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