MnTe2/Ni electrode material for super-capacitor and preparation method thereof

Abstract

The invention discloses a MnTe2/Ni electrode material for a super-capacitor. MnTe2 is adopted as an electrode active material to be covered on a Ni substrate. The MnTe2 is formed to be of a hemisphere-shaped honeycomb structure. The MnTe2 hemisphere-shaped honeycomb structure is encircled by MnTe2 sheets to form a large number of cellular pores. The invention also discloses a preparation method of the MnTe2/Ni electrode material. The method comprises the steps of weighing a tellurium source, a manganese source and a reducing agent; putting the above materials into a reaction kettle, and adding a solvent; fully stirring and placing a foam nickel sheet in the reaction kettle; subjecting the above materials to reaction in a heating furnace; taking out an obtained product, repeatedly washing the product with anhydrous ethanol and deionized water, and then drying the product to obtain the MnTe2/Ni electrode material. The specific capacitance of the prepared MnTe2/Ni electrode material at the discharge current of 10 mA is 116.9F*g/1. After 5000 times of cycles, the capacitance of the material can still be maintained to be 100%. Therefore, the good cycling stability is realized.

Description

technical field [0001] The invention relates to the field of batteries, in particular to the field of electrode materials for supercapacitors and a preparation method thereof. Background technique [0002] Supercapacitor is a new type of energy storage device, which uses porous carbon materials with high specific surface area as electrodes or uses electrode active materials for underpotential deposition, so that it can undergo rapid and reversible chemical adsorption / desorption or oxidation / reduction reactions to Obtain the capacitance of the order of Faraday, so it has both the energy storage characteristics of the battery and the power characteristics of the capacitor. It is thousands of times higher than the specific energy of the traditional electrolytic capacitor, and the leakage current is thousands of times smaller. It can charge and discharge 100,000 times More than one time without maintenance and maintenance, it can be used in the working state of instantaneous dis...

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Problems solved by technology

Among transition metal oxides, RuO 2 It has a high specific capacitance, but its high cost, low reserves and serious environmental pollution limit its practical application

Other transition metal oxides such as MnO 2 , NiO and Co 3 o 4 , has also been extensively studied, th

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