Electrode plate for lithium ion battery and manufacturing method thereof

Abstract

The invention discloses an electrode plate for a lithium ion battery and a manufacturing method thereof, and particularly relates to the electrode plate for the lithium ion battery taking multi-layer graphene as a conductive agent and a manufacturing method thereof. The electrode plate of the invention consists of a positive electrode or negative electrode active substance, the conductive agent and an adhesive. The method comprises the steps of: using the positive electrode or negative electrode active substance, the conductive agent and the adhesive as raw materials to obtain electrode slurry through stirring and dispersing, and then obtaining the electrode plate through coating, drying and tabletting. The conductive agent adopted by the invention has the advantages of high dispersivity, high electric conductivity, good filling effect and the like; and the method has the advantages of simplicity, low production cost and convenient popularization and application. The method can remarkably improve the electric conductivity, electrochemical capacity and enhance charge-discharge capability of electrode materials by multiples, so the method can be widely applied to the preparation of electrode plates of lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of carbon materials and chemical power sources, and in particular relates to lithium-ion battery electrode pole pieces using multilayer graphene as a conductive agent and a manufacturing method thereof. Background technique [0002] As a new type of green secondary battery with high specific energy, lithium-ion battery occupies a leading position in the market of mobile phones, notebook computers, cameras, etc., and has become the main power source of small civilian electronic products. With the research and development of high-power lithium-ion battery packs, the application of lithium-ion batteries is rapidly expanding to fields such as electric vehicles, space satellites, military communications, and aviation and navigation. [0003] In fact, the conductivity of lithium-ion battery cathode materials is very poor, and its conductivity is in the range of 10 -4 -10 -9 Between S / cm. In order to enhance the...

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Problems solved by technology

The main disadvantages of this patent are: special dispersion of carbon nanotubes and carbon fibers is required, and it is difficult to ensure the uniformity of dispersion of carbon nanotubes by means of ultrasonic dispersion and stirring, and the uniformity of dispersion of carbon nanotubes will directly affect lithium The electrochemical capacity of the ion battery, the method of the invention has many steps, the dispersion effect of the conductive agent is difficult to control, and is not suitable for industrialized production

However, the research on multilayer graphene as a conductive agent for lithium-ion batteries has not yet been reported in domestic and foreign journals and patent materials.

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