Three-dimensional nano composite electrode material for electrochemical energy storage and preparation method thereof

Abstract

The invention discloses a three-dimensional nano composite electrode material for electrochemical energy storage and a preparation method thereof. The three-dimensional nano composite electrode material for electrochemical energy storage is formed by compounding two or more than two nano carbon materials, a conductive agent, a binder and a supercapacitor electrode material or a lithium ion batteryelectrode material. The preparation method of the three-dimensional nano composite electrode material for electrochemical energy storage comprises the steps: preparation of the three-dimensional nanocomposite electrode for the supercapacitor and preparation of the three-dimensional nano composite electrode for the lithium ion battery. According to the invention, two or more nano carbon materialsand a conductive agent are introduced to carry out composite modification on the supercapacitor or lithium ion battery electrode material; through the optimization of a compounding method and the full exerting of the synergistic effect of various nano carbon materials and the conductive agent, the three-dimensional nano composite electrode material disclosed by the invention is high in assembly density, good in conductivity, excellent in rate characteristic and electrochemical stability, simple in preparation process, green, environment-friendly, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to a high-performance novel three-dimensional nanocomposite electrode material for supercapacitors or lithium-ion batteries and a preparation method thereof. Background technique [0002] Since the 20th century, the economy has developed rapidly, resources are on the verge of depletion, and pollution has become increasingly serious. It is imminent to find new renewable energy sources that can replace fossil energy sources such as oil, coal, and natural gas. At the same time, the rapid development of new energy technologies has brought about an urgent need for new energy storage technologies. [0003] Supercapacitor (also known as electrochemical capacitor) is a new type of energy storage element between conventional capacitors and chemical batteries that has been developed at home and abroad in recent decades. Due to its high power density (10 3 ~10 4 Wkg ...

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Problems solved by technology

Based on this, patents CN105047874A and CN102569796A respectively disclose methods for compounding lithium iron phosphate materials with graphene and carbon nanotubes to prepare composite electrodes, and patents CN107706397A and CN101764219A disclose ternary materials, graphite materials and A method for preparing a composite electrode through composite modification. The rate performance of the lithium-ion battery nano-carbon composite electrode material prepared by this method can be improved to a certain extent, but this type is obtained by composite modification of a single nano-carbon material and lithium-ion battery electrode material. The method of improving the power performance of lithium-ion batteries has limitations, and it is still difficult to meet the market's requirements for high-power, long-cycle, and high-energy-density lithium-ion batteries, especially in the field of new energy vehicles for high energy density, high power characteristics, and long cycle life. Strict requirements for lithium-ion power batteries

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