Application of CuCl/Cu composite material

A composite material and current collector technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of reducing electrode cycle charge/discharge life, insufficient combination of active material and current collector, pulverization and shedding, etc. Achieve good charge-discharge cycle stability, improve cycle stability, and increase discharge specific capacity.

Active Publication Date: 2016-05-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the long-term cycle charging / discharging process, the electrode prepared based on the traditional electrode technology often pulverizes and falls off due to the insufficient combination between the active material and the current collector and reduces the cycle charge / discharge life of the electrode. Therefore, it is necessary to develop a new electrode preparation process.
[0004] Cuprous chloride, as an important organic synthesis catalyst, has been widely used in petrochemical industry, metallurgical industry, pharmaceutical chemical industry and many other industries, but it has not been used as a lithium-ion battery electrode material.

Method used

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  • Application of CuCl/Cu composite material
  • Application of CuCl/Cu composite material
  • Application of CuCl/Cu composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Using 0.1mol / L sodium chloride aqueous solution with pH=5 as the electrolyte solution, copper foil as the working electrode, platinum sheet as the counter electrode, constant current (5mA / cm 2 ) anodized for 60s, rinsed and dried under vacuum at 25°C to obtain CuCl / Cu composites.

[0024] The prepared CuCl / Cu composite material was directly used as the working electrode, the lithium foil was used as the counter electrode and the reference electrode, and the Celgard2500 film was used as the diaphragm, and the 1MLiPF 6 The mixture of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) is the electrolyte, wherein the volume ratio of EC, DEC and DMC is 1:1:1, and then filled with A button-type simulated lithium-ion battery is assembled with lithium foil in a high-purity argon glove box, and its charge / discharge performance and cycle stability are tested by a constant current charge / discharge method.

Embodiment 2

[0026] Using 0.1mol / L sodium chloride aqueous solution with pH=5 as the electrolyte solution, copper foil as the working electrode, platinum sheet as the counter electrode, constant current (5mA / cm 2 ) anodized for 120s, rinsed and dried under vacuum at 25°C to obtain CuCl / Cu composites.

[0027] Without adding additional conductive agent and binder, the CuCl / Cu composite material is directly used as the working electrode, the lithium foil is used as the counter electrode and the reference electrode, and the Celgard2400 film is used as the separator. 6 The mixture of ethylene carbonate (EC) and diethyl carbonate (DEC) is the electrolyte solution, wherein the volume ratio of EC and DEC is 1:1, and then assembled with lithium foil in a glove box filled with high-purity argon A button-type simulated lithium-ion battery, and its charge / discharge performance is tested by a constant current charge / discharge method ( Figure 4 ) performance and cycle stability ( Figure 5 ), it can...

Embodiment 3

[0029] Use 0.06mol / L potassium chloride aqueous solution with pH = 7 as the electrolyte solution, in which the working electrode is copper foil, the counter electrode is platinum sheet electrode, constant current (5mA / cm 2 ) anodized for 240s, rinsed and dried in vacuum at 40°C to obtain CuCl / Cu composites.

[0030] Without adding additional conductive agent and binder, the CuCl / Cu composite material is directly used as the working electrode, the lithium foil is used as the counter electrode and the reference electrode, the Celgard2325 film is used as the separator, and the 1MLiPF 6 The mixture of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl carbonate (DMC) is the electrolyte, in which the volume ratio of EC, DEC and DMC is 1:1:1, filled with high-purity A button-type simulated lithium-ion battery is assembled in an argon glove box, and its charge / discharge performance and cycle stability are tested by a constant current charge / discharge method.

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Abstract

The invention discloses application of a CuCl / Cu composite material, and belongs to the development and research field of new energy source materials. The CuCl / Cu composite material is substantially obtained through depositing in situ a layer of water-insoluble cubic-crystal phase cuprous chloride active substance on the surface of a metal copper current collector through a one-step anodic oxidation method, and is then assembled with a lithium foil in a glove box filled with high pure argon gas to form a button type simulation lithium ion battery. The homologous substances, i.e. a copper current collector and cuprous chloride, are ingeniously and tightly combined together by an in-situ growth method; the specific surface area of the electrode material is large; the combination with the copper current collector is tight; and the contact resistance is favorably reduced. Compared with the traditional coating type electrode process, the process has the advantages that the operation is simple, environment-friendly and easy for amplification; more importantly, the falling phenomenon of the active substance in the long-period charging / discharging process is favorably relieved; and the rate discharging performance and charging / discharging cycle performance of the lithium ion battery are improved.

Description

technical field [0001] The invention relates to an application of a CuCl / Cu composite material, in particular to an application of a CuCl / Cu composite material in a lithium ion battery, and belongs to the field of development and research of new energy materials. Background technique [0002] Lithium-ion batteries are green energy storage devices with high efficiency and high energy density, which have been widely used in mobile electronic devices. Electrode materials are one of the key components of lithium-ion batteries, closely related to the performance of lithium-ion batteries, and are one of the research hotspots. [0003] The electrode preparation process of the traditional lithium-ion battery is a physical coating process, that is, the active material, the conductive agent (acetylene black), and the binder (PVDF) are uniformly mixed in a certain proportion to form an electrode slurry, and directly coated on the surface of the current collector. . During the long-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/0525
CPCH01M4/582H01M4/626H01M10/0525Y02E60/10
Inventor 侯宏英刘松刘显茜段继祥孟瑞晋
Owner KUNMING UNIV OF SCI & TECH
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