A method for constructing a flexible metal negative electrode using a positive electrode material as an interface layer

A cathode material, flexible metal technology, applied in electrode collector coatings, structural parts, battery electrodes, etc., can solve the problems of many side reactions, poor mechanical stability, poor safety, etc., to achieve good bendability, cycle good stability

Active Publication Date: 2022-07-12
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the disadvantages of the existing metal negative electrode as a flexible metal negative electrode material, such as poor bending performance, poor mechanical stability, heavy weight, many side reactions, low utilization rate, poor safety, etc., and the currently used modification strategy has high cost , complex process and other issues, providing a method for constructing a flexible metal negative electrode using the positive electrode material as the interface layer

Method used

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  • A method for constructing a flexible metal negative electrode using a positive electrode material as an interface layer
  • A method for constructing a flexible metal negative electrode using a positive electrode material as an interface layer
  • A method for constructing a flexible metal negative electrode using a positive electrode material as an interface layer

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Effect test

Embodiment 1

[0025] Deposition of metallic zinc on the surface of carbon cloth modified vanadium oxide cathode film:

[0026] a: prepare the 0.02M ammonium metavanadate solution of 100mL, transfer to the reaction kettle of polytetrafluoroethylene after ultrasonic dispersion;

[0027] b: carbon with a size of 3*5 is arranged in the above-mentioned ammonium metavanadate solution, then, after being continuously heated in an oven at 160 ° C for 10 min, it is naturally cooled, and then washed with deionized water and dried;

[0028] c: Assemble the sample obtained in step b and the zinc sheet into a half-cell, and after standing for 12 hours, use the blue electric system to deposit metal zinc, and the deposition amount is 6mAh cm –2 .

Embodiment 2

[0030] Deposition of metallic zinc on the surface of carbon cloth modified manganese oxide cathode film:

[0031] a: prepare the 0.02M potassium permanganate solution of 100mL, transfer to the reaction kettle of polytetrafluoroethylene after ultrasonic dispersion;

[0032] b: commercial carbon with a size of 3*5 is arranged in the above potassium permanganate solution, then, after being continuously heated in an oven at 180 ° C for 10 min, it is naturally cooled, and then washed with deionized water and dried;

[0033] c: Assemble the sample obtained in step b and the zinc sheet into a half-cell, and after standing for 12 hours, use the blue electric system to deposit metal zinc, and the deposition amount is 6mAh cm –2 .

Embodiment 3

[0035] Deposition of lithium metal on the carbon cloth surface modified lithium cobalt oxide cathode film after delithiation:

[0036] a: The lithium cobalt oxide was sprayed on the carbon cloth substrate, sintered at a high temperature of 800°C, and cooled naturally;

[0037] b: then the above-mentioned material and graphite are assembled into a battery, and the charging process is carried out after standing for 12h, and lithium ions are removed, and then the battery is disassembled, and the electrode sheet is taken out for washing and drying;

[0038] c: Assemble the sample obtained in step b and the lithium sheet into a half-cell, and after standing for 12 hours, use the blue electric system to deposit lithium metal, and the deposition amount is 6mAh cm –2 .

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Abstract

The invention discloses a method for constructing a flexible metal negative electrode by using a positive electrode material as an interface layer. In this method, the interface of the cathode material is used as the inducing layer, and the cathode material is in-situ trace-modified on a lightweight and flexible conductive substrate to obtain an ultra-thin cathode film; based on the cathode material, it has a site that can realize ion intercalation and a lower ion intercalation barrier. , The characteristics of excellent structural stability, the initial uniform nucleation and subsequent stable deposition of the metal were successfully achieved, and the flexible metal negative electrode was obtained. The invention adopts the method of positive electrode film modification to realize the directional growth and precise regulation of metal on the nanometer level, and then realizes the preparation of a highly stable flexible metal negative electrode by quantitatively depositing the metal. The invention not only provides a new method for inducing metal anode deposition by a brand-new cathode film, but also obtains an integrated metal anode with light weight, good bendability and good cycle stability, which can be widely used in wearable electronic devices and so on. field.

Description

technical field [0001] The invention belongs to the technical field of inorganic nano-material synthesis, and particularly relates to a method for constructing a flexible metal negative electrode by using a positive electrode material as an interface layer. Background technique [0002] In recent years, the rapid development of smart wearable electronic devices has changed people's lifestyles and made people's lives more convenient. However, with the rapid development and rapid replacement of emerging portable and flexible electronic devices, the energy supply system as its core component has gradually been unable to meet the normal needs of the market. Therefore, the development of a new generation of wearable and stretchable battery systems with its higher power density and energy density, green environmental protection and other advantages has become the focus of research topics. Among many energy storage devices, rechargeable metal batteries have been widely studied as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/134H01M4/1395
CPCH01M4/0404H01M4/134H01M4/1395Y02P70/50
Inventor 邵明飞李剑波谢文富张士蒙
Owner BEIJING UNIV OF CHEM TECH
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