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Preparation method of electrostatic spinning lithium ion battery negative electrode plate

A technology for lithium-ion batteries and negative pole pieces, applied in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve problems such as low production efficiency, achieve low production costs, increase transmission rate, and improve conductivity

Inactive Publication Date: 2018-11-02
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned invention adopts electrospinning, what this method prepares is only the negative electrode material. After obtaining the negative electrode material, it is necessary to prepare the slurry according to the traditional stirring coating method, so the production efficiency is low.

Method used

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  • Preparation method of electrostatic spinning lithium ion battery negative electrode plate

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Embodiment 1

[0021] A method for preparing an electrospinning lithium-ion battery negative pole piece, comprising the steps of:

[0022] (1) lithium polyoxometalates Li 3 PMo 12 o 40 Dissolved in deionized water to form lithium polyoxometalate salt solution;

[0023] (2) graphite is added in lithium polyoxometalate solution, and surfactant sodium dodecylbenzenesulfonate is added to form a spinning solution; water-based adhesive LA13x is: acrylonitrile multi-polymer, respectively Any one of LA132, LA133 and LA135.

[0024] (3) Put the spinning solution into the electrospinning apparatus for spinning, the receiving plate is copper foil, the spinnerets are in multiple groups, and the distance between the spinneret and the receiving plate is 0.1-8cm (the best distance is 5cm) ;The voltage is 16-20KV (the best is 18Kv); the jet flow rate is 0.1-0.3mL / S (the best flow rate is 0.2mL / S), the filaments are densely and uniformly bonded to the copper foil, and then the bonding The copper foil wi...

Embodiment 2

[0028] Preparation method and test method are the same as embodiment 1, just change lithium polyoxometalate into Li 3 PW 12 o 40 .

Embodiment 3

[0030] Preparation method and test method are the same as embodiment 1, just change lithium polyoxometalate into Li 4 SiMo 12 o 40 .

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Abstract

The invention discloses a preparation method of an electrostatic spinning lithium ion battery negative electrode plate. The preparation method comprises the following steps of dissolving polyoxometallate salt into deionized water to form a polyoxometallate solution; adding graphite into the polyoxometallate solution, and adding a surfactant sodium dodecyl benzene sulfonate and a water-based adhesive La13<x> to form a spinning solution; putting the spinning solution into an electrostatic spinning instrument for spinning, and performing spinning of the spinning solution on a copper foil, whereinwire strips are dense and are uniformly adhered to the copper foil; and then drying the copper foil adhered with the wire strips to obtain the battery negative electrode plate. Compared with a traditional stirring and coating process, the preparation method adopting the electrostatic spinning process has the advantages that the process time is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for preparing an electrospun lithium-ion battery negative pole piece. Background technique [0002] As a representative of green energy, lithium-ion batteries have been greatly developed in recent years and have been gradually applied to the fields of automotive power batteries and energy storage batteries. However, due to the defects of lithium-ion battery materials and processes, its large-scale application in the field of power and energy storage is limited. At present, it is only in the demonstration stage, and the market acceptance is not high. The main reason is the influence of the polarization and internal resistance of the battery itself. The influencing factors of polarization and internal resistance are electronic conductivity and lithium ion conductivity. At present, lithium battery materials can meet the electronic conductivity to a large exten...

Claims

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Application Information

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IPC IPC(8): H01M4/1397H01M4/04H01M4/58H01M10/0525
CPCH01M4/0402H01M4/1397H01M4/5825H01M10/0525Y02E60/10
Inventor 廖小东
Owner 中国东方电气集团有限公司
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