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Preparation method of novel tin-based nanocrystalline alloy flexible film electrode

A technology of nanocrystalline alloys and flexible films, which is applied in electrode manufacturing, battery electrodes, electrode collector coatings, etc., can solve the problems of active material shedding and other problems, and achieve high production efficiency, convenient operation, and simple preparation process.

Active Publication Date: 2018-09-25
河南电池研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a novel tin-based nanocrystalline alloy flexible film electrode for lithium-ion batteries and a preparation method thereof, which effectively solves the problem that the active material in the existing tin-based negative electrode is easy to fall off from the current collector, and at the same time The method can realize the continuous large-scale preparation of tin-based nanocrystalline alloy flexible thin film electrodes

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  • Preparation method of novel tin-based nanocrystalline alloy flexible film electrode
  • Preparation method of novel tin-based nanocrystalline alloy flexible film electrode
  • Preparation method of novel tin-based nanocrystalline alloy flexible film electrode

Examples

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Embodiment 1

[0034] The tin-based nanocrystalline alloy flexible film electrode of the lithium ion battery of the present embodiment is prepared by the following method:

[0035] (1) get electroplating solution main salt and electroplating complexing agent preparation electroplating solution, the concentration of potassium pyrophosphate in this electroplating solution is 0.15mol / L, the concentration of cupric chloride is 0.06mol / L, the concentration of stannous pyrophosphate is 0.05mol / L, filter the prepared electroplating solution to remove impurities to obtain a transparent solution, namely electroplating solution A;

[0036] (2) Add gelatin, PEG800, sodium dodecylbenzenesulfonate and polyether polyol in electroplating solution A to obtain electroplating solution B as additive, gelatin, PEG800, sodium dodecylbenzenesulfonate in this electroplating solution B and the total concentration of polyether polyol is 5g / L;

[0037] (3) continue to add electroplating solution main salt cupric chl...

Embodiment 2

[0047] The tin-based nanocrystalline alloy flexible film electrode of the lithium ion battery of the present embodiment is prepared by the following method:

[0048] (1) get electroplating solution main salt and electroplating complexing agent preparation electroplating solution, the concentration of potassium pyrophosphate in this electroplating solution is 0.25mol / L, the concentration of cupric chloride is 0.06mol / L, the concentration of stannous pyrophosphate is 0.05mol / L, filter the prepared electroplating solution to remove impurities to obtain a transparent solution, namely electroplating solution A;

[0049] (2) Add gelatin, PEG400, sodium dodecylbenzenesulfonate and polyether polyol in electroplating solution A to obtain electroplating solution B as additive, gelatin, PEG400, sodium dodecylbenzenesulfonate in this electroplating solution B and the total concentration of polyether polyol is 15g / L;

[0050] (3) continue to add electroplating solution main salt copper ch...

Embodiment 3

[0059] The tin-based nanocrystalline alloy flexible film electrode of the lithium ion battery of the present embodiment is prepared by the following method:

[0060] (1) Get electroplating solution main salt and electroplating complexing agent preparation electroplating solution, the concentration of potassium pyrophosphate in this electroplating solution is 0.4mol / L, the concentrated acid of potassium phosphate is 0.2mol / L, the concentration of cupric chloride is 0.12 mol / L, the concentration of tin protochloride is 0.1mol / L, the electroplating solution that will prepare is filtered to remove impurity and obtain transparent solution and be electroplating solution A;

[0061] (2) Add gelatin, glucose, PEG400, PEG800, sodium lauryl sulfate and methoxypolyoxyethylene ether in electroplating solution A to obtain electroplating solution B as additives, gelatin, glucose, PEG400, PEG800 in this electroplating solution B The total concentration of sodium lauryl sulfate and sodium lau...

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Abstract

The invention discloses a novel tin-based nanocrystalline alloy flexible film electrode and a preparation method thereof, and belongs to the technical field of preparation of tin-based alloy film electrodes. The preparation method is characterized by comprising the following steps of: preparing electroplating solution main salt soluble copper salt and soluble tin salt and a electroplating complexing agent into an electroplating solution A; adding additives to the electroplating solution A to obtain an electroplating solution B; continuing to add the electroplating solution main salt soluble copper salt and the soluble tin salt to the electroplating solution B to obtain an electroplating solution C; conducting surface-treatment on a current collector for electroplating; placing the electroplating solution C and the surface-treated current collector in a plating bath for electroplating to obtain the tin-based nanocrystalline alloy flexible film electrode; and rinsing and drying the tin-based nanocrystalline alloy flexible film electrode to obtain a copper-tin nanocrystalline alloy flexible film electrode. The novel tin-based nanocrystalline alloy flexible film electrode and the preparation method thereof effectively solve a problem that a tin-based active material is easily detached from the current collector during a charging and discharging process, and a preparation process issimple, operation is convenient, cost is low, and production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of preparation of tin-based alloy thin-film electrodes, and in particular relates to a novel tin-based nanocrystalline alloy flexible thin-film electrode and a preparation method thereof. Background technique [0002] With the rapid development of science and technology, electronic equipment and electric vehicles have entered a stage of rapid development, and people have put forward higher and higher requirements for the capacity, energy density, safety and service life of lithium-ion batteries. The current commercial carbon-based negative electrode materials have a capacity close to the theoretical specific capacity of 372mAh / g, and there is limited room for industrial improvement. Moreover, lithium ions are prone to generate lithium dendrites during the deintercalation process of the carbon negative electrode, which can pierce the separator, causing a short circuit and causing safety problems. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M4/1395H01M10/0525C25D3/58C25D5/34
CPCC25D3/58C25D5/34H01M4/0404H01M4/0452H01M4/1395H01M10/0525Y02E60/10
Inventor 杨书廷郑延辉张芬丽董红玉
Owner 河南电池研究院有限公司
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