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Solid-state battery pole piece as well as preparation method and application thereof

A solid-state battery and solid-state electrolyte technology, which is applied in battery electrodes, non-aqueous electrolyte battery electrodes, secondary batteries, etc., can solve the problems of increasing the battery impedance of the pole piece and unsmooth ion conduction, so as to improve the safety performance of the battery and avoid the aftermath Disposal and recycling, the effect of avoiding environmental pollution

Pending Publication Date: 2021-11-05
SVOLT ENERGY TECH (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the binder itself in the pole piece is an insulator of ions and electrons. The introduction of the binder will cause the ion conduction in the pole piece to be unsmooth, thereby increasing the impedance of the pole piece and the battery.

Method used

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  • Solid-state battery pole piece as well as preparation method and application thereof

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Embodiment 1

[0057] This embodiment provides a solid-state battery pole piece, which is a solid-state battery positive pole piece with a thickness of 70 μm, including a current collector, and an active material layer arranged on the surface of the current collector. The active material layer includes LiNi 0.8 co 0.1 mn 0.1 o 2 , carbon nanotubes and Li 3 InI 3 Br 3 , in the active material layer, LiNi 0.8 co 0.1 mn 0.1 o 2 The mass ratio is 65.2%, the carbon nanotube mass ratio is 2.2%, and the Li 3 InI 3 Br 3 The mass proportion is 32.6%.

[0058] This embodiment also provides a preparation method of the above-mentioned solid battery pole piece, and the preparation method specifically includes the following steps:

[0059] 6g LiNi 0.8 co 0.1 mn 0.1 o 2 , 0.2g carbon nanotubes, 3g Li 3 InI 3 Br 3 After stirring and mixing, the active material layer was prepared by rolling at 80° C., and the active material layer and the current collector were rolled to form a solid batte...

Embodiment 2

[0061] This embodiment provides a solid-state battery pole piece, which is a solid-state battery negative pole piece with a thickness of 120 μm, including a current collector, and an active material layer arranged on the surface of the current collector. The active material layer includes graphite, carbon nanotubes and Li 3 InI 3 Br 3 , in the active material layer, the graphite mass accounts for 66.3%, the carbon nanotube mass accounts for 2.1%, and the Li 3 InI 3 Br 3 The mass ratio is 31.6%.

[0062] This embodiment also provides a preparation method of the above-mentioned solid battery pole piece, and the preparation method specifically includes the following steps:

[0063] 6.3g of graphite, 0.2g of carbon nanotubes, 3g of Li 3 InI 3 Br 3 After stirring and mixing, the active material layer was prepared by rolling at 80° C., and the active material layer and the current collector were rolled to form a solid battery pole piece.

Embodiment 3

[0065] This embodiment provides a solid-state battery pole piece. Compared with Embodiment 1, the difference is that the active material layer includes LiNi 0.8co 0.1 mn 0.1 o 2 , acetylene black and Li 3 GaCl 3 f 3 , in the active material layer, LiNi 0.8 co 0.1 mn 0.1 o 2 The mass proportion is 52%, the mass proportion of acetylene black is 1%, and the Li 3 GaCl 3 f 3 The mass proportion is 35%, and the rest is Li 6 SP 5 Cl solid electrolyte.

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Abstract

The invention provides a solid-state battery pole piece as well as a preparation method and application thereof. The solid-state battery pole piece comprises a current collector and an active substance layer arranged on the surface of the current collector, and the active substance layer comprises an active substance, a viscous solid electrolyte and a conductive agent. The viscous solid electrolyte is adopted, has the performance of ionic conductivity, viscidity, low energy storage modulus and low loss modulus, and plays the role of an ionic conductor and a binding agent, so that the use of an organic polymer binding agent and a solvent in the pole piece manufacturing process is avoided, a drying process is omitted, the problems of post-treatment and recovery of the organic solvent and the like are avoided, production costs can be effectively saved, and environmental pollution is avoided;in addition, an organic polymer does not exist in the battery pole piece, so that the problem of impedance increase caused by decomposition of the polymer under high and low voltages is avoided; compared with a traditional lithium ion battery, the lithium ion battery has ion conduction capability and binding power, the addition of electrolyte is avoided, and the safety performance of the battery is improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a solid-state battery pole piece, a preparation method and application thereof. Background technique [0002] With the popularization of electronic products and new energy vehicles, lithium batteries as their power sources are becoming more and more popular due to their advantages such as light weight, small size, high working voltage, high energy density, high output power, high charging efficiency and no memory effect. As more and more attention has been paid to it, it is inevitable that the safety and energy density requirements of lithium batteries are also getting higher and higher. [0003] The electrolyte used in lithium-ion batteries widely used in the market is an organic liquid electrolyte, which also brings a series of problems. Liquid electrolytes are generally composed of lithium salts, organic solvents and additives, and are in a liquid state that is ...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/139H01M4/62H01M10/0525H01M10/0562
CPCH01M4/13H01M4/139H01M4/62H01M4/625H01M10/0562H01M10/0525H01M2300/008Y02E60/10
Inventor 李瑞杰王磊黄海强陈少杰
Owner SVOLT ENERGY TECH (WUXI) CO LTD
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