Electrochemical capacitor containing titanium dioxide and method for preparing same

Abstract

Disclosed is an electrochemical capacitor which contains titanium dioxide. A negative plate is made from active carbon, conductive agent and caking agent at weight ratio of 75-85:15-10:10-5, and a positive plate is made from titanium dioxide dopant material, conductive agent and caking agent at weight ratio of 75-85:15-10:10-5. The method for fabricating the electrochemical capacitor which contains titanium dioxide includes the following steps: getting the following materials according to weight proportions: titanium dioxide 100, compound doped with metal 1-10, and graphite 1-10; mixing the titanium dioxide and the compound doped with metal and then baking the mixture in a muffle furnace and at last mixing the baked mixture with the graphite, thus obtaining titanium dioxide dopant material; making the titanium dioxide dopant material, the conductive agent and the caking agent at weight ratio of 75-85:15-10:10-5 into a positive plate for the electrochemical capacitor. The capacitor fabricated through the method is used on electric tools and electric automobiles and can reduce pollution to the environment.

Description

technical field [0001] The invention relates to an electrochemical capacitor and a preparation method thereof, in particular to an electrochemical capacitor containing titanium dioxide and a preparation method thereof. Background technique [0002] RuO 2 It is an existing material with better capacitance performance at present, but the mineral resources of this material are limited, and it is expensive to use this material to make positive plates in electrochemical capacitors, which is not conducive to widespread use. Regarding the use of titanium dioxide as an electrode material for electrochemical capacitors, there are relatively few studies on this aspect. Titanium dioxide is doped and modified to improve its capacity performance, and assembled into a laminated electrochemical capacitor packaged in aluminum-plastic film. Using this type of capacitor in electric tools and electric vehicles can prolong the service life of the battery and reduce the CO 2 emissions, improv...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is, for RuO 2 The defects of limited resources, high price, polluting the environment, and being unfavorable for widespread use provide an electrochemical capacitor containing titanium dioxide and a preparation method thereof. Using this capacitor in el...