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Lithium transfer type lithium supplementing method for lithium battery

A transfer type, lithium battery technology, applied in the field of electrochemical energy storage, to achieve the effect of improving the effect of lithium supplementation, improving process compatibility, and improving safety

Pending Publication Date: 2020-09-18
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the current problem of improving the performance of materials, thereby proposing a lithium transfer lithium replenishment method for lithium batteries

Method used

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  • Lithium transfer type lithium supplementing method for lithium battery
  • Lithium transfer type lithium supplementing method for lithium battery
  • Lithium transfer type lithium supplementing method for lithium battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Taking PET base film-graphene-lithium metal as an example to illustrate the lithium transfer layer, the details are as follows:

[0043] see figure 1 and figure 2 , the preparation of graphene base layer 2: select single-layer graphene as base material, join 5g graphene into concentrated nitric acid: in the 30ml prefabricated reagent of water=N (5>N>1), stir overnight and carry out surface modification, The surface-modified graphene is washed with deionized water, and the washed graphene is centrifuged to remove the solution phase, and is repeatedly cleaned to PH=6; the cleaned graphene is placed in a vacuum oven for vacuum drying; The dried graphene is ground until it reaches the process requirements; the processed graphene is dispersed and homogenized using N-methylpyrrolidone (NMP), and the prepared slurry is coated on the surface of the PET base film 1 by a scraping method. The coating thickness depends on the specific process, generally in the range of 0.1-100 μ...

Embodiment 2

[0047] Taking copper foil-LLZTO-lithium metal as an example to illustrate the lithium transfer layer, the details are as follows:

[0048] Preparation of copper foil-LLZTO-lithium metal transfer layer: Copper foil is selected as the base film material, and 5 film rolls of the copper foil base film are placed in the vacuum chamber of the roll-to-roll magnetron sputtering coating equipment; the sputtering chamber Vacuum up to 10 -6 mbar; adjust the Ar gas flow and sputtering parameters of LLZTO and lithium target positions respectively; turn on the heater in the process area to heat the copper foil entering the process area; adjust the take-up speed according to the designed deposition thickness; click the process start button to perform LLZTO in sequence The base layer 6 and the lithium metal layer 3 are deposited; after the process stops, the gas is inflated, and the copper foil-LLZTO-lithium metal transfer layer film roll is taken out of the vacuum chamber.

[0049] The lith...

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Abstract

The invention relates to a lithium transfer type lithium supplementing method for a lithium battery. The lithium supplementing method takes a base film-substrate-lithium metal composite structure as alithium transfer layer, enables the lithium metal side of the lithium transfer layer to be opposite to a lithium supplementing process surface of an electrode layer, removes the base film layer after1-100kg of pressure rolling, and forms a lithium supplementing electrode finished product with a substrate-lithium-electrode structure. Lithium is supplemented through the lithium transfer layer, theprocess safety is improved, meanwhile, nanoscale regulation of the lithium supplementing thickness is achieved, a uniform and continuous lithium supplementing layer is obtained, and a more excellentlithium supplementing effect is obtained; winding equipment is used for lithium transfer operation, the method is suitable for large-scale production, the technology is suitable for existing equipment, and special equipment does not need to be developed; as the substrate layer is made of the material with high ionic conductivity, the performance of the battery is not influenced.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and in particular relates to a lithium transfer type lithium replenishment method for a lithium battery. Background technique [0002] The development of electrochemical energy is inseparable from people's life and defense industry. Consumer electronics products used in daily life, electric-driven new energy vehicles, and distributed power grids are all inseparable from chemical energy storage. As people's dependence on consumer electronic products increases, the requirements for the standby time of electronic equipment are increasing day by day. On the other hand, the current energy density of mainstream power batteries is about 250-300Wh / Kg, and my country plans to achieve 400Wh / Kg in 2025 for power batteries used in electric vehicles. At the same time, the distributed grid system (especially distributed photovoltaic power generation), which has developed rapidly in rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/66H01M10/052
CPCH01M4/0402H01M4/667H01M4/043H01M4/0423H01M4/0428H01M4/0421H01M4/0438H01M10/052Y02E60/10
Inventor 赵岳韩宇冯金晖徐睿杨明郝明明张晶
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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