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Poly-phenylenediamine Conducting Polymer Electrode Materials For Supercapacitor's

Posted on:2005-12-05Degree:MasterType:Thesis
Country:ChinaCandidate:H Y ChenFull Text:PDF
GTID:2192360125467687Subject:Polymer Chemistry and Physics
Abstract/Summary:PDF Full Text Request
With the development of the economy and the increase of the population, energy shortage and environment pollution increase seriously, human depend on recycling and green energy more and more. As everyone knows electric vehicles can solve the problem of environment pollution of automobile commendably. Supercapacitors, a new energy storage components between batteries and electrostatic capacitors. The use of a capacitor in conjuncture with a battery can provide a hybrid power source, meet the high power out-put need of electric vehicles when starting-up or acceleration and hill-climbing, for their power density could be tens times higher than that of batteries. They could also be used as electric components and power sources for small electrical equipment and direct current switches. Research and development of supercapacitors have gained jmportance in recent yeas. There isn't any report on applicable supercapacitors techniques or products in our country, so it is important to study on supercapacitors for the promotion of electric vehicles in our nation.We conducted a series of experiments to research on electrode materials, electrolytes, preparation and other related techniques with, the aids of the measure methods such as cyclic voltammentric measurements, constant charge-discharge measurements, X-rays diffraction(XRD), IR, "Scanning electronic microscope measurements(SEM) and so on. By experiments we got the conclusions as follows:The polyaniline electrode can provide good capacitance character inpotassium hydroxide solution and the specific capacitance was 83 F g-1.Poly(m-phenylenediamine) was synthesized by oxidation polymerization of m-phenylenediamine. The first pyrolytic poly(w-phenylenediamine) (PPDAN-1) was obtained by treating poly(m-phenylenediamine) under high temperature and the second pyrolytic poly(m-phenylenediamine)(PPDAN-2) was prepared by further heating PPDAN- 1 in the presence of KOH and then used for supercapacitor active electrode material. The charge-discharge results showed that PPDAN-3 exhibited better electrochemical performances and the specific capacitance was 189 F g-1.
Keywords/Search Tags:Poly(m-phenylenediamine), Polyaniline, Pyrolytic, Supercapacitor, Specific capacitance
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