Nano-material modified carbon fluoride electrode material manufacturing method

Abstract

The invention discloses a nano-material modified carbon fluoride electrode material manufacturing method. The method comprises the following steps of mixing a medium and carbon fluoride, adding a ferro-nickel alloy and mixing; adding a nano material, reacting, airing, carrying out vacuum drying, grinding, calcining in an argon atmosphere, and cooling to a room temperature; and grinding, and screening with a 100-200-mesh sieve to obtain a nano-material modified carbon fluoride electrode material. A mass ratio of the nano material to the carbon fluoride is (0.5-5):100. In the invention, a carbonfluoride material is modified by adopting the nano material, and the nano material is uniformly distributed on a surface of the carbon fluoride material so that conductivity of the carbon fluoride material is improved, problems of voltage lag and low-temperature performance of the carbon fluoride material are effectively solved, and a rate capability of a lithium carbon fluoride battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium primary battery production and processing, and in particular relates to a preparation method of a carbon fluoride electrode material modified by a nanometer material. Background technique [0002] A primary lithium battery is a high-energy chemical primary battery, commonly known as a lithium battery. Metal lithium is used as the negative electrode, solid salts or salts dissolved in organic solvents are used as the electrolyte, and metal oxides or other solid and liquid oxidants are used as the positive active material. General-purpose round lithium manganese dioxide (Li / MnO 2 ) battery and lithium fluoride carbon [Li / (CFx)n] battery are represented by the letters CR and BR respectively, and the subsequent numbers represent the model of the battery. Lithium primary battery is a general term for this type of chemical power supply series using metallic lithium as the negative electrode material. ...

AI Technical Summary

Problems solved by technology

However, fluorinated carbon cathode materials also have some insurmountable defects, which are as follows: 1) The specific capacity of fluorinated carbon cathode materials is determined by the fluorine content. The higher the fluorine content, the higher the theoretical specific capacity of the material, but the fluorine content and It will restrict the electronic conductivity of positive electrode materials; for example, when the fluorocarbon ratio is close to 1, fluorinated carbon is equivalent to an electronic insulator. Therefore, in general, the specific capacity and rate performance of lithium fluorinated carbon batteries are mutually restricted. Optimum at the same time

2) The low electronic conductivity and slow electrode reaction kinetics of carbon fluoride cathode materials will cause battery voltage hysteresis and poor low-temperature performance; 3) Lithium / carbon fluoride batteries produce significant heat during discharge, which directly affects the battery pack. 4) Low capacity performance and large capacity loss at low current density

Due to the good stability and conductivity of conductive polymers, scholars at home and abroad have used conductive polypyrrole, polyaniline and polythiophene to modify carbon fluoride materials, but the results are not satisfactory.

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