3D printing positive electrode material, preparation method and application thereof

A 3D printing and cathode material technology, applied in the field of 3D printing cathode material preparation, can solve problems such as difficulty in improving the specific capacity and rate performance of electrode materials, difficulty in controlling the proportion of effective active substances in batteries, affecting ion diffusion rate, etc., to achieve high-efficiency electronic Transfer efficiency, good conductive network, the effect of improving the transmission rate
CN111477843AActive Publication Date: 2020-07-31江西省纳米技术研究院
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江西省纳米技术研究院
Publication Date
2020-07-31

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Abstract

The invention discloses a 3D printing positive electrode material, a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing an active substance, a conductive agent, a binder and a solvent to prepare electrode slurry; by using a 3D printing technology, placing the electrode slurry on the inner layer of a coaxial printing needle head, placing a graphene oxide solution on the outer layer of the coaxial printing needle head, and carrying out coaxial printing to obtain a composite positive electrode material; and carrying out drying and heat treatment on the composite positive electrode material to obtain the 3D printing positive electrode material. The invention provides a preparation method of a novel positive electrode material. According to the invention, by using a 3D printing method, the traditional concept of preparing a positive electrode material containing a current collector by utilizing a coating method is broken through, the obtained electrode material does not need an aluminum foil as the current collector, the positive electrode material with high sulfur loading capacity, no current collector, high-efficiency ions and high electron transmission efficiency and integrated structure is realized, and the positive electrode material has potential application in the field of lithium-sulfur battery application.
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Description

technical field

[0001] The invention relates to a preparation method of a 3D printing positive electrode material, in particular to a 3D printing positive electrode material for a lithium-sulfur battery and a preparation method thereof, as well as its application in the field of lithium-sulfur batteries, belonging to the technical field of energy storage materials. Background technique

[0002] 3D printing technology is also called "additive manufacturing technology". Compared with traditional manufacturing technology, it has obvious advantages such as low cost, fast and simple process, and no pollution to the environment. Among many 3D printing molding technologies, extrusion 3D printing technology is the most widely used because of its simple and fast operation, low cost and diversity of material systems. And the positive electrode of lithium-sulfur battery was prepared by extrusion 3D printing technology. This method can also be applied to almost all electrode active mat...

Claims

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