Modified lithium/carbon fluoride battery

A fluorinated carbon battery and modified technology, applied in the direction of organic electrolyte batteries, battery electrodes, non-aqueous electrolyte batteries, etc., can solve the problems of poor conductivity of positive electrode material fluorinated carbon, limitation, affecting the high current discharge performance of batteries, etc. , to achieve the effect of high current discharge capacity, large industrial and commercial value, and reduced internal resistance

Inactive Publication Date: 2015-04-22
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the technical problem of lithium / carbon fluoride battery is that the positive electrode material carbon fluoride has poor electronic conductivity, which affects the high-current discharge performance of the battery and limits its use in many fields.

Method used

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  • Modified lithium/carbon fluoride battery
  • Modified lithium/carbon fluoride battery
  • Modified lithium/carbon fluoride battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Firstly, manganese dioxide-doped graphite fluoride was prepared, manganese dioxide and graphite fluoride were uniformly mixed, and ball milled on a planetary ball mill for 12 hours to obtain manganese dioxide-doped graphite fluoride. The doping amount of manganese dioxide is 0.1%-10%.

[0020] Graphite fluoride with different doping amounts of manganese dioxide and a conductive agent are bonded on an aluminum current collector and coated to form a positive electrode. The content of graphite fluoride modified with different doping amounts of manganese dioxide is 88%. The conductive agent can be conductive carbon black and carbon nanotubes, and the total content of the conductive agent is 5%. The type of binder is styrene-butadiene rubber and sodium carboxymethyl cellulose, and the content is 7%.

[0021] The negative electrode is made by rolling lithium foil on the current collector, the current collector is nickel foam welded with lead strips, and the thick...

Embodiment 2

[0026] Based on the preparation of lithium / carbon fluoride batteries with different ratios of active materials and conductive agents, firstly, fluorinated graphite and conductive agents are bonded on the aluminum current collector and coated to form a positive electrode. The content of manganese dioxide modified graphite fluoride is 80%-90%. The types of the conductive agent are conductive carbon black and carbon nanotubes, and the total content of the conductive agent is 3%-13%. The type of binder is styrene-butadiene rubber and sodium carboxymethyl cellulose, and the content is 7%.

[0027] The negative electrode is made by rolling lithium foil on the current collector, the current collector is nickel foam welded with lead strips, and the thickness of the lithium foil is 200 μm.

[0028] Assemble the positive electrode, negative electrode and separator into a square cell. The height of the negative plate is 1mm-2mm higher than the positive plate, the height of the diaphrag...

Embodiment 3

[0033] Fluorinated graphite is bonded with a conductive agent and coated on an aluminum current collector to make a positive electrode. The content of manganese dioxide modified graphite fluoride is 85%. The conductive agent is conductive carbon black and carbon nanotubes, and the total content of the conductive agent is 8%. The type of binder is styrene-butadiene rubber and sodium carboxymethyl cellulose, and the content is 7%.

[0034] The negative electrode is made by rolling lithium foil on the current collector, the current collector is nickel foam welded with lead strips, and the thickness of the lithium foil is 200 μm.

[0035] Assemble the positive electrode, negative electrode and separator into a square cell. The height of the negative plate is 1mm-2mm higher than the positive plate, the height of the diaphragm is 2mm-3mm higher than the negative plate, and the square battery tabs are located on the left and right sides.

[0036] The electrolyte is lithium hexaflu...

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Abstract

The invention discloses a modified lithium / carbon fluoride battery which is characterized by comprising the following anode materials in percentage by weight: 80-90% of manganese dioxide modified carbon monofluoride, 3-13% of a conductive agent and 7% of a bonding agent. The electronic conductivity of a material is improved by using manganese dioxide modified carbon polymonofluoride, and during high-current discharge of the battery, the internal resistance is reduced, the polarization phenomenon is reduced, and the discharge capacity of the battery is improved. Therefore, the invention can provide a high-current primary battery which has strong discharge capacity and has great industrial and commercial values.

Description

technical field [0001] The battery technical field of the present invention is particularly a modified lithium / carbon fluoride battery. Background technique [0002] At present, with the development of the economy, the supporting power supplies of various electronic products are developing in the direction of light weight, high energy, long storage life and high safety. At present, lithium primary batteries mainly include lithium manganese dioxide batteries, lithium thionyl chloride batteries, lithium / carbon fluoride batteries, etc. In the solid cathode primary lithium battery, the theoretical mass specific energy of the lithium / carbon fluoride battery is the highest in the solid cathode series, about 2180 Wh / Kg (the specific energy of the lithium / thionyl chloride battery is 1470 Wh / Kg, the lithium / The specific energy of manganese dioxide battery is 1005 Wh / Kg). Since the fluorinated carbon material is very stable, the lithium fluorinated carbon battery has a good capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M6/16H01M4/583H01M4/62
CPCH01M6/16H01M4/382H01M4/587H01M4/621H01M4/625
Inventor 张红梅王庆杰魏俊华石斌赵洪楷陈铤张云朋万伟华杨中发
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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