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

A carbon fluoride, based lithium technology, applied in primary batteries, primary battery use/maintenance, non-aqueous electrolyte batteries, etc., can solve the problem of accelerating the migration rate of lithium ions and discharge products, reducing battery capacity, and rarely commercializing batteries And other issues

Inactive Publication Date: 2015-05-06
中国船舶重工集团公司第七一二研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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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...

Method used

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

Examples

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Embodiment 1

[0041] Embodiment 1, as figure 1 Shown is a basic embodiment of the carbon fluoride-based lithium primary battery of the present invention. A carbon fluoride-based lithium primary battery, comprising a positive electrode sheet 1, a negative electrode sheet 4, a separator 3 and an electrolyte 2; the positive electrode sheet 1 is made of a conductive metal foil or a mesh 1.1 as a collector and attached to the conductive metal foil or the composite slurry 1.2 on the net; the composite slurry 1.2 includes carbon fluoride, or a modified material of carbon fluoride; the negative electrode sheet 4 is made of lithium metal, or a modified material of lithium metal, or contains metal Lithium alloy material; The electrolyte 2 is an electrolyte with functional additives, including non-aqueous electrolytes and functional additives added therein at least for improving battery rate performance; the functional additives in the electrolyte 2 The content is 0.01% to 10% in volume percentage; t...

Embodiment 2

[0043] Embodiment 2 is a preferred embodiment of the carbon fluoride-based lithium primary battery of the present invention. The difference from Example 1 is that in the carbon fluoride-based lithium primary battery, the content of the functional additive polyethylene glycol octylphenyl ether (Trition 100, (C2H4O)nC14H22O) in the electrolyte is 0.01%~1%.

Embodiment 3

[0044] Embodiment 3 is a further embodiment on the basis of Embodiment 1. In the carbon fluoride-based lithium primary battery, the functional additive also includes a composition of one or more of SEI film-forming agent, anti-overcharge additive, flame retardant and stabilizer.

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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...

Claims

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Application Information

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IPC IPC(8): H01M6/16H01M6/50
CPCH01M6/168H01M6/5083
Inventor 周思思廖志平吴军刘小俊周章华
Owner 中国船舶重工集团公司第七一二研究所
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