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Lithium/lithium alloy composite negative electrode for high-power primary battery, preparation method and battery

A lithium alloy, high-power technology, which is applied in the field of lithium/lithium alloy composite negative electrode and preparation, can solve the problems of not improving the interface of lithium negative electrode and not intending to improve the power performance of lithium primary battery, so as to improve surface utilization efficiency and reduce electrode Effect of volume change and consumption reduction

Active Publication Date: 2022-01-18
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents do not improve the interface of lithium anodes, nor are they intended to improve the power performance of lithium primary batteries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A lithium / lithium alloy composite negative electrode for a high-power primary battery prepared by the invention is composed of lithium metal foil and LiSi alloy powder, wherein the added amount of the LiSi alloy powder accounts for 10 wt% of the composite negative electrode. The specific preparation process: Weigh 11.9g of LiSi alloy powder, and then spread the powder between two layers of lithium metal foils with a size of 10*50*0.4cm. The powder and lithium metal are composite rolled together, and after repeated rolling, the number of rolling is 5 times, and finally a uniform composite negative electrode strip with a thickness of 0.4 mm is obtained. Cut the composite negative electrode strips into discs with a diameter of 15 mm, and the CoS 2 As the positive electrode, the electrolyte uses 1M LiBF 4 / PC:DME (1:1), assembled into a 2032 button battery, and tested its discharge performance. The results show that the discharge specific power of the button battery at roo...

Embodiment 2

[0029] A lithium / lithium alloy composite negative electrode for a high-power primary battery prepared by the invention is composed of lithium metal foil and LiAl alloy powder, wherein the added amount of the LiAl alloy powder accounts for 10 wt% of the composite negative electrode. The specific preparation process: Weigh 11.9g of LiAl alloy powder, and then spread the powder between two layers of lithium metal foils with a size of 10*50*0.4cm. The powder and lithium metal are composite rolled together, and after repeated rolling, the number of rolling is 5 times, and finally a uniform composite negative electrode strip with a thickness of 0.4 mm is obtained. Cut the composite negative electrode strips into discs with a diameter of 15 mm, and the CoS 2 As the positive electrode, the electrolyte uses 1M LiBF 4 / PC:DME (1:1), assembled into a 2032 button battery, and tested its discharge performance. The results show that the discharge specific power of the button battery at roo...

Embodiment 3

[0031] A lithium / lithium alloy composite negative electrode for a high-power primary battery prepared by the invention is composed of lithium metal foil and LiSi alloy powder, wherein the added amount of the LiSi alloy powder accounts for 50 wt% of the composite negative electrode. The specific preparation process: Weigh 11.9g of LiSi alloy powder, and then spread the powder between two layers of lithium metal foils with a size of 10*50*0.4cm. The powder and lithium metal are composite rolled together, and after repeated rolling, the number of rolling is 5 times, and finally a uniform composite negative electrode strip with a thickness of 0.4 mm is obtained. Cut the composite negative electrode strips into discs with a diameter of 15 mm, and the CoS 2 As the positive electrode, the electrolyte uses 1M LiBF 4 / PC:DME (1:1), assembled into a 2032 button battery, and tested its discharge performance. The results show that the discharge specific power of the button battery at roo...

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Abstract

The invention discloses a lithium / lithium alloy composite negative electrode for a high-power primary battery, a preparation method and a battery, wherein the lithium is metal lithium foil, the lithium alloy is lithium alloy powder, and the composite negative electrode contains : two layers of metal lithium foil, and a lithium alloy as an intermediate layer; the lithium alloy is arranged between two layers of the metal lithium foil; the composite negative electrode is formed by combining the metal lithium foil and the Obtained by rolling lithium alloys together. The lithium alloy includes: one or more of LiSi alloy, LiAl alloy, LiSn alloy and LiGe alloy. A lithium / lithium alloy composite negative electrode for high-power primary batteries of the present invention prepares a lithium / lithium alloy negative electrode by simple mechanical rolling at room temperature, and successfully builds a rapid charge carrier in the metal lithium foil electrode. The diffusion channel greatly improves the electrode rate performance while improving the utilization rate of the lithium metal surface.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium / lithium alloy composite negative electrode for a high-power primary battery, a preparation method and a battery. Background technique [0002] Primary batteries refer to batteries that cannot be used repeatedly by charging after use, including familiar carbon zinc-manganese batteries, alkaline zinc-manganese batteries, lithium-manganese batteries, zinc-air batteries, zinc-silver batteries, and lithium thionyl chloride batteries. Nominal voltages range from 1.4V to 3.6V to 9V. Among them, the lithium primary battery uses metal lithium or lithium alloy as the negative electrode, which has large specific energy (more than 200Wh / kg and 400Wh / L), high working voltage, and stable discharge performance (voltage and Resistance remains unchanged), wide operating temperature range (-40~70°C), excellent storage performance (small self-discharge), easy to use and carry, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/40H01M4/12H01M6/04
CPCH01M4/362H01M4/382H01M4/405H01M4/12H01M6/04H01M2004/027
Inventor 朱明蒋立江露王超殷彬赵昱枫赵小玲李鑫郭鸿帅
Owner SHANGHAI INST OF SPACE POWER SOURCES
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