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A kind of sulfur-rich copolymer layered electrode and its preparation method and application

A technology of copolymer layer and sulfur-rich polymer, which is applied in electrode manufacturing, battery electrodes, electrode collector coatings, etc., can solve problems such as poor cycle stability, achieve simple preparation methods, broad market prospects, and eliminate potential safety hazards Effect

Active Publication Date: 2022-02-01
GUANGDONG POLYTECHNIC NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a sulfur-rich copolymer layered electrode to solve the problem of poor cycle stability of the existing lithium-sulfur batteries proposed in the background art

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  • A kind of sulfur-rich copolymer layered electrode and its preparation method and application
  • A kind of sulfur-rich copolymer layered electrode and its preparation method and application
  • A kind of sulfur-rich copolymer layered electrode and its preparation method and application

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preparation example Construction

[0047] The embodiment of the present invention also provides a preparation method of the above-mentioned sulfur-rich copolymer layered electrode, the preparation method of the sulfur-rich copolymer layered electrode includes the following steps:

[0048] 1) Coating a layer of conductive polymer slurry on the current collector, then placing the sulfur-rich polymer layer on the conductive polymer slurry coated on the current collector, and flattening;

[0049] 2) coating a layer of conductive polymer paste on the flattened sulfur-rich polymer layer, and then placing another sulfur-rich polymer layer on top of the conductive polymer paste coated on the sulfur-rich polymer layer, Flatten to obtain the sulfur-rich copolymer layered electrode.

[0050] As another preferred embodiment of the present invention, in the preparation method of the sulfur-rich copolymer layered electrode, it also includes repeating the operation of step 2) at least once, that is, coating the conductive pol...

Embodiment 1

[0069] A preparation method of a sulfur-rich copolymer layered electrode, comprising the following steps:

[0070] Step 1: Preparation of polymer active sulfur-loaded conductive agent

[0071] 1) Weigh the elemental sulfur and aniline monomer solution according to the mass ratio of 5:1, and place the mixture of the two in a pressure-adjustable reactor container under magnetic stirring to mix evenly;

[0072] 2) Heat the pressure-adjustable airtight container to 160 degrees Celsius for 3 hours, and control the pressure range of the reactor to 1.0 Pa relative to the atmospheric pressure through the pressure relief valve;

[0073] 3) Cool naturally after the heating reaction is completed, and add the corresponding mass conductive agent, seal the container again and heat the mixture to 180 degrees Celsius for 20 minutes, during which the mixture is quickly mixed at a magnetic stirring speed of 260 rpm, and obtained after cooling Polymer active sulfur loaded conductive agent mater...

Embodiment 2

[0079] A preparation method of a sulfur-rich copolymer layered electrode, comprising the following steps:

[0080] Step 1: Preparation of polymer active sulfur-loaded conductive agent

[0081] 1) Weigh the elemental sulfur and pyrrole monomer solution according to the mass ratio of 5:1, and place the mixture of the two in a pressure-adjustable three-way round-bottomed flask under magnetic stirring to mix evenly;

[0082] 2) Heat the pressure-adjustable airtight container to 180 degrees Celsius for 2 hours, and control the pressure range of the reactor to 1.2 Pa relative to the atmospheric pressure through the pressure relief valve;

[0083] 3) Cool naturally after the heating reaction is completed, and add the corresponding mass conductive agent (same as in Example 1), seal the container again and heat the mixture to 180 degrees Celsius for 20 minutes, during which the magnetic stirring speed is at 500 rpm The mixture is mixed and cooled to obtain a polymer active sulfur-load...

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Abstract

The invention relates to the field of electric energy storage systems, and specifically discloses a sulfur-rich copolymer layered electrode and its preparation method and application. The sulfur-rich copolymer layered electrode is a plurality of polymer films formed by conductive polymer slurry , and the multi-layer layered structure formed by the sulfur-rich polymer layer separated by the polymer film. The polymer film formed by the conductive polymer paste is used as the spacer layer by using the sulfur-rich polymer as the active component, and the active sulfur Loading capacity up to 8mg / cm 2 , has good battery cycle stability at the same time, eliminates the potential safety hazard caused by the diffusion of polysulfide compounds, and solves the problem of poor cycle stability in existing lithium-sulfur batteries; and the preparation method provided is simple, which is helpful for lithium-sulfur batteries. The early commercialization of sulfur batteries has broad market prospects.

Description

technical field [0001] The invention relates to the field of electric energy storage systems, in particular to a sulfur-rich copolymer layered electrode and its preparation method and application. Background technique [0002] With the continuous development of science and technology and the continuous progress of new energy vehicle technology, power energy storage batteries represented by lithium-ion batteries have made rapid progress. Lithium-ion batteries are widely used in drones and wireless earphones because of their high energy density, long service life, no memory effect, low self-discharge rate, high and low temperature adaptability, and high power tolerance. , hearing aids, mobile phones, computers and other high-end equipment fields. The energy density of conventional ternary lithium-ion batteries currently on the market has increased from 130 Wh / kg in 2010 to 220 Wh / kg in 2021. However, limited by the theoretical energy density of ternary materials, the upper l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/66H01M4/62H01M4/60H01M10/0525H01M4/04
CPCH01M4/667H01M4/602H01M4/624H01M4/621H01M10/0525H01M4/0404Y02E60/10
Inventor 曾帅波徐伟叶林鸿高群郭颖华屈慕超林成伍强
Owner GUANGDONG POLYTECHNIC NORMAL UNIV
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