Carbon-fluoride-based primary lithium battery and preparation method and detection method thereof

Abstract

The invention relates to a carbon-fluoride-based primary lithium battery and a preparation method and a detection method thereof. A battery positive plate consists of a conductive metal foil or net serving as a current collector and composite slurry attached to the conductive metal foil or net, wherein the composite slurry comprises carbon fluoride; and the electrolyte consists of nonaqueous electrolyte and an added functional additive used for improving the rate capability of the battery at least. The preparation method comprises the following steps: preparing the electrolyte, preparing positive and negative plates and assembling the battery. The carbon-fluoride-based primary lithium battery and the preparation method and the detection method thereof disclosed by the invention have the advantages that the electrolyte with the functional additive in the battery can be directly contacted with the positive plate, so that the plate has good interfacial properties; the battery has low interface resistance, the wetting property of the electrolyte is improved, and the transmission of lithium ions on the interface is improved, so that the rate capability of the carbon-fluoride-based primary lithium battery is improved; and moreover, a positive active material carbon fluoride or a carbon fluoride modified material and the electrolyte have good interfacial compatibility, so that good voltage platform and specific discharge capacity can be obtained.

Description

technical field [0001] The invention relates to a carbon fluoride-based lithium primary battery and a preparation method and a detection method thereof. It is a carbon fluoride-based lithium primary battery with a high-rate and long-storage non-aqueous electrolyte, and belongs to the technical field of batteries. Background technique [0002] The theoretical specific capacity of lithium fluoride carbon battery is as high as 865mAh / g, the open circuit voltage is 3.2-3.7V, and the temperature range is wide (-40 to 130°C). Because its capacity density is significantly higher than that of lithium primary batteries such as lithium manganese dioxide and lithium thionyl chloride, and its storage life is more than 10 years, and it is environmentally friendly. Lithium fluoride batteries are widely used in the fields of security, industry, and medicine. It has broad application prospects. As early as the 1970s, the lithium fluoride carbon battery has been commercialized, and it is th...

AI Technical Summary

Problems solved by technology

Improving the interface between the electrolyte and the carbon fluoride active material and accelerating the migration rate of lithium ions and discharge products are effective means to improve the rate performance. However, many additives that improve the interface performance lead to a decrease in battery capacity.

At present, the discharge rate of the electrical equipment widely used in fluorinated carbon batteries is below 0.05C, and there are few commercial batteries with high-power discharge higher than 1C.

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