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Cobaltous oxide nanosheet-sponge nickel/metal lithium composite material as well as preparation method and application thereof

A technology of cobaltous oxide nanometer and composite materials, which is applied in the direction of electrical components, battery electrodes, circuits, etc., can solve the problems of dendrite growth, battery performance degradation, battery interface interruption, etc., to achieve energy density, increase load capacity, The effect of low overpotential

Pending Publication Date: 2022-02-08
YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Eventually, the SEI fractures, leading to dendrite growth, and a vicious cycle forms between dendrites and volume expansion, which leads to disruption of the battery interface and leads to degradation of battery performance.

Method used

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  • Cobaltous oxide nanosheet-sponge nickel/metal lithium composite material as well as preparation method and application thereof
  • Cobaltous oxide nanosheet-sponge nickel/metal lithium composite material as well as preparation method and application thereof
  • Cobaltous oxide nanosheet-sponge nickel/metal lithium composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] This embodiment provides a preparation method of cobaltous oxide nanosheet-sponge nickel / lithium metal composite material, comprising the following steps:

[0033] (1) configure nickel acetate aqueous solution

[0034] 0.871g of Ni(AC) 2 4H 2 O was added to 70 mL of deionized water and stirred at room temperature for 30 min to prepare a nickel acetate aqueous solution with a concentration of 0.05 mol / L;

[0035] (2) Configure reaction solution A

[0036] Add 7 mL of N to the nickel acetate aqueous solution prepared in step (1) 2 h 4 ·H 2 O and stirred for 15min to obtain reaction solution A;

[0037] (3) Preparation of sponge nickel base material

[0038] Pour the reaction solution A into a 100mL liner and put it into a hydrothermal reaction kettle, heat it to 100°C for 10 hours; after the reaction is completed, take out the base material and wash it with deionized water for 3 times, freeze-dry it for 12 hours to obtain a sponge nickel base material ;

[0039] ...

Embodiment 2

[0046] This embodiment provides a preparation method of cobaltous oxide nanosheet-sponge nickel / lithium metal composite material, comprising the following steps:

[0047] (1) configure nickel acetate aqueous solution

[0048] 0.871g of Ni(AC) 2 4H 2 O was added to 70 mL of deionized water and stirred at room temperature for 30 min to prepare a nickel acetate aqueous solution with a concentration of 0.05 mol / L;

[0049] (2) Configure reaction solution A

[0050] Add 7 mL of N to the nickel acetate aqueous solution prepared in step (1) 2 h 4 ·H 2 O and stirred for 15min to obtain reaction solution A;

[0051] (3) Preparation of sponge nickel base material

[0052] Pour the reaction solution A into a 100mL liner and put it into a hydrothermal reaction kettle, heat it to 100°C for 10h; after the reaction is completed, take out the base material and wash it with deionized water for 3 times, and freeze-dry it for 12h to prepare the sponge nickel base material ;

[0053] (4)...

Embodiment 3

[0060] This embodiment provides a preparation method of cobaltous oxide nanosheet-sponge nickel / lithium metal composite material, comprising the following steps:

[0061] (1) configure nickel acetate aqueous solution

[0062] 0.871g of Ni(AC) 2 4H 2 O was added to 70 mL of deionized water and stirred at room temperature for 30 min to prepare a nickel acetate aqueous solution with a concentration of 0.05 mol / L;

[0063] (2) Configure reaction solution A

[0064] Add 7 mL of N to the nickel acetate aqueous solution prepared in step (1) 2 h 4 ·H 2 O and stirred for 15min to obtain reaction solution A;

[0065] (3) Preparation of sponge nickel base material

[0066] Pour the reaction solution A into a 100mL liner and put it into a hydrothermal reaction kettle, heat it to 100°C for 10h; after the reaction is completed, take out the base material and wash it with deionized water for 3 times, and freeze-dry it for 12h to prepare the sponge nickel base material ;

[0067] (4)...

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Abstract

The invention discloses a cobaltous oxide nanosheet-sponge nickel / metal lithium composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a sponge nickel substrate material by a hydrothermal method; (2) preparing a sponge nickel substrate material loaded with a cobaltous oxide nanosheet by a hydrothermal method; (3) compounding the sponge nickel substrate material loaded with the cobaltous oxide nanosheet by using molten lithium to obtain the cobaltous oxide nanosheet-sponge nickel / metal lithium composite material. The cobaltous oxide nanosheet-sponge nickel / metal lithium composite material provided by the invention can relieve the volume change in the metal lithium deposition process, obviously disperse and reduce the reaction current density, improve the electric field distribution uniformity in the metal lithium deposition process and inhibit dendritic crystal growth, has relatively high cycling stability, rate capability and coulombic efficiency, the electrochemical performance of the lithium metal battery can be effectively improved, and the composite material has a wide application prospect in the fields of portable electronic equipment, electric automobiles, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of composite electrode materials, and in particular relates to a cobaltous oxide nanosheet-sponge nickel / lithium metal composite material and its preparation method and application. Background technique [0002] Currently, lithium-ion batteries not only dominate the market for small batteries for portable electronic devices, but have also become the technology of choice for vehicles such as hybrids and all-electric vehicles. However, its corresponding volume and mass energy densities have almost reached the limit, which cannot meet the growing demand. Therefore, it is urgent to develop alternative anode materials. Among all metal elements, Li metal anode due to its low density (0.59g / cm 3 ), high theoretical specific capacity (3860mAh / g), and the lowest electrochemical potential (-3.04Vvs standard hydrogen electrode), it is expected to become one of the most ideal negative electrode materials. Therefore, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/525
CPCH01M4/362H01M4/525H01M4/52Y02E60/10
Inventor 夏新辉张永起
Owner YANGTZE DELTA REGION INST OF UNIV OF ELECTRONICS SCI & TECH OF CHINE HUZHOU
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