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Preparation and Study on the Composite Electrode Materials for Electrochemical Supercapacitor

Author: WangYanPeng
Tutor: HuZhongAi
School: Northwest Normal University
Course: Physical and chemical
Keywords: Electrochemical Supercapacitors Composite electrode materials Electrochemical properties 13X molecular sieve Grafted Carboxyl starch Polyaniline
CLC: TM53
Type: Master's thesis
Year: 2007
Downloads: 487
Quote: 6
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Abstract


Electrochemical Supercapacitors are a cross between the battery and a conventional capacitor between the new energy storage equipment and devices, it has a specific energy greater than conventional capacitors, long long cycle life, and use temperatures than the greater than the power in the battery, The wide range of features, it has broad application prospects in hybrid electric vehicles, mobile phones, computer and many other fields. According to the energy storage principle, Electrochemical Supercapacitors can be divided into the electric double layer capacitor and the Faraday quasi capacitor, and the main electrode material with a carbon material, metal oxide and conductive polymer. In the the electrochemical supercapacitors study electrode materials more compelling. In this thesis electrochemical supercapacitor electrode materials, the latest research progress, and preparation of the composite electrode materials, XRD, SEM and TEM analysis of the microstructure and morphology of the electrode material, and constant current charge discharge, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) technology test its electrochemical properties. The full text is divided into five chapters, the main content is summarized as follows: Chapter 1: Overview of electrochemical capacitor energy storage mechanism, characteristics and application prospects highlight electrochemical supercapacitor electrode materials - carbon-based materials, metal oxides, and conductive polymers and other aspects of the latest research progress. Chapter II: Electrochemical test methods involved in this thesis, the cyclic voltammetry method (CV), galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS) concepts, principles, and data analysis, an overview and discussion. Chapter: 13X zeolite as the carrier liquid precipitation synthesized two molecular sieve Fund metal hydroxides composite electrode materials - Co (OH) 2 / 13X and Ni (OH) < sub> 2 / 13X. By XRD, SEM to characterize the structure and morphology of the the two composite electrode materials, the results show, hydroxides growth in 13X molecular sieve surface the crystal type β-Co (OH) and α-Ni (OH) 2 ; cyclic voltammetry tests showed that the electrode reaction of the two composite electrodes with good reversibility, cyclic voltammogram was \- reduction peak, suitable for use as electrode materials for electrochemical supercapacitors; constant current charge and discharge results show: Composite Electrode Materials Co (OH) 2 / 13X and Ni (OH) 2 < / sub> / 13X specific capacitance of 176F / g and 134.2 F / g, respectively. Chapter IV: Grafted Carboxyl starch strong adsorption properties of metal ions synthesized the Grafted Carboxyl starch hydroxide electrode materials - Ni (OH) 2 / CISC and Co (OH) < sub> 2 / CISC. Thermogravimetric analysis, TEM, XRD, and IR spectra of their composition, structure, morphology and thermal stability analysis and research. By cyclic voltammetry method (CV), constant current charge and discharge of two composite electrode materials for electrochemical performance tests. The results showed that the electrode reaction of the two composite electrode materials with good reversibility, suitable used as electrode materials for electrochemical supercapacitors; constant current charge and discharge results show that the composite electrode material Co (OH) 2 / CISC and Ni (OH) 2 / CISC than capacitance of 147F / g and 115F / g. Chapter 5: Select the high conductivity of polyaniline as shell material, and by homogeneous precipitation method Preparation of CeO the 2 nanoparticles composite evenly dispersed in sodium dodecyl benzene sulfonate, nanocomposite electrode material, made of core-shell emulsion polymerization method. Using thermal gravimetric analysis, SEM, XRD, FIRT composite electrode material composition, structure, morphology and thermal stability analysis and research.

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CLC: > Industrial Technology > Electrotechnical > Electrical > Capacitor
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