Flexible integrated thin-film lithium-sulfur or lithium ion battery cell, battery and preparation method thereof

A lithium-ion battery and cell technology, applied in the field of electrochemical energy storage, can solve the problems of poor flexibility, low bonding strength between the active material and the current collector interface, easy to fall off, etc., to achieve the effect of strong flexibility

Inactive Publication Date: 2016-12-21
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The battery cell prepared by this method has poor flexibility, and the bonding strength between the metal current collector and the active material is insufficient, resulting in low bonding strength between the active material and the current collector interface, and it is easy to fall off in a bent state.
Therefore, the battery prepared by this method is not suitable for flexible batteries that need to be bent many times during use.

Method used

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  • Flexible integrated thin-film lithium-sulfur or lithium ion battery cell, battery and preparation method thereof
  • Flexible integrated thin-film lithium-sulfur or lithium ion battery cell, battery and preparation method thereof
  • Flexible integrated thin-film lithium-sulfur or lithium ion battery cell, battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 0.5g PVDF and add it to 30g NMP (N-methylpyrrolidone), stir with a magnetic stirrer until the PVDF is completely dissolved; weigh 0.4g acetylene black and 0.1g carbon nanotubes into the PVDF solution, stir for 2 hours; weigh 4g The lithium-rich ternary material was added into the above dispersion liquid, and stirred for 8 hours to obtain the positive electrode slurry. The positive electrode slurry was scraped-coated on a polyethylene separator, and dried in an oven at 60°C.

[0042] Weigh 0.2g PVDF and place it in 30g NMP, and stir it with a magnetic stirrer until the PVDF is completely dissolved; weigh 0.15g SP, 0.1g VGCF, and 0.5g graphene and add it to the PVDF solution, and stir for 3 hours to obtain a conductive paste; The material is sprayed on the positive electrode coating, the tabs are pressed and bonded to the conductive paste, and dried in an oven at 90°C.

[0043] Weigh 0.4g CMC and add 20g deionized water and stir until CMC is completely dissolved; W...

Embodiment 2

[0048] Weigh 0.5g PVDF into 30g NMP, stir with a magnetic stirrer until PVDF is completely dissolved; weigh 0.4g SuperP and 0.1g VGCF into the PVDF solution, stir for 2h; weigh 4g carbon / sulfur composite material and add to the above dispersion , stirred for 8h to obtain positive electrode slurry. The positive electrode slurry was scraped-coated on a polyethylene separator, and dried in an oven at 60°C.

[0049] Weigh 0.3g PVDF and place it in 30g NMP, and stir it with a magnetic stirrer until the PVDF is completely dissolved; weigh 0.6gSP, 0.3g VGCF, and 0.1g graphene and add it to the PVDF solution, and stir for 3 hours to obtain a conductive paste; The material is sprayed on the positive electrode coating, the tabs are pressed and bonded to the conductive paste, and dried in an oven at 90°C.

[0050] In a drying room, weigh 0.5g of PVDF and add it to 20g of γ-butyrolactone and stir until the PVDF is completely dissolved; weigh 4g of surface-passivated lithium powder partic...

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PUM

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Abstract

The invention discloses a flexible integrated thin-film lithium-sulfur or lithium ion battery cell, battery and preparation method thereof. The preparation method of the battery cell comprises the following steps: step one, preparing anode slurry; step two, adhering the anode slurry on the first side of a diaphragm to form an anode slurry layer; step three, preparing the anode conductive slurry; step four, adhering the anode conductive slurry on the anode slurry layer to form an anode conductive layer; step five, preparing cathode slurry; step six, adhering the anode slurry on the second side of the diaphragm to form a cathode slurry layer; step seven, preparing the cathode conductive slurry; step eight, adhering the cathode conductive layer on the cathode slurry layer to form a cathode conductive layer, thereby obtaining a cell. The battery cell prepared through the method disclosed by the invention does not contain a current collector, the anode and the cathode are integrated with the diaphragm, the entire cell is a thin-film and has extremely strong flexibility. The discharge specific energy of the battery prepared by use of the battery cell is higher than that of a flexible-packaged lithium-sulfur battery prepared through a conventional method, and the cycle performances are equivalent.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and relates to a lithium-sulfur battery or a lithium-ion battery, in particular to a flexible integrated thin-film lithium-sulfur or lithium-ion battery cell, a finished battery and a preparation method thereof. Background technique [0002] With the increasingly severe energy and environmental problems in today's world, people's demand for clean, efficient and renewable energy continues to increase, and the efficient conversion and storage of energy has also attracted increasing attention. High energy density and environmentally friendly lithium-ion batteries and lithium-sulfur batteries have become new options in the field of energy storage. With the continuous development of flexible / foldable electronic devices in recent years, the development of flexible lithium-ion batteries with high energy density (that is, high capacity), high power density (fast charge and discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/058
CPCH01M4/5815H01M4/623H01M4/625H01M10/058Y02E60/10Y02P70/50
Inventor 裴海娟郭瑞李永刘雯解晶莹
Owner SHANGHAI INST OF SPACE POWER SOURCES
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