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Iron-zinc-tin alloy lithium ion battery cathode material

A negative electrode material, tin alloy technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problem of low theoretical specific capacity, achieve simple and efficient process, improve cycle and stability, overcome expansion or shrinkage effect.

Inactive Publication Date: 2016-12-14
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the anode materials of lithium-ion batteries used in the market are mainly graphite materials, whose theoretical specific capacity is relatively low, and performance such as cycle performance and capacity need to be improved.

Method used

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Embodiment 1

[0014] A preparation method of iron-zinc-tin alloy anode material, the steps include:

[0015] 1. Prepare tin electroplating solution; 2. Put the prepared tin electroplating solution into the electroplating tank, use platinum sheet as anode and iron sheet as cathode for electroplating; 3. Prepare zinc electroplating solution; 4. Put the prepared zinc The electroplating solution is added to the electroplating tank, the platinum sheet in step 2 is used as the anode, and the tin electroplated iron sheet is used as the cathode for electroplating; 5. The electroplated iron sheet is washed and dried to obtain the iron-zinc-tin alloy anode material.

[0016] The formula of the electroplating solution in the first step is: 23 g / L of tin sulfate, 17 g / L of propylurea, 16 g / L of sodium fluoroacetate, and 24 g / L of N-formamide.

[0017] The process conditions of the second step are: the electroplating solution temperature is 39-42°C, the current density is 8A / dm2, and the electroplating time is...

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Abstract

The invention provides a preparation method of an iron-zinc-tin alloy cathode material. The method comprises the following steps: 1. preparation of a tin electroplating solution; 2. the prepared tin electroplating solution is added into an electroplating bath, a platinum sheet is used as an anode, an iron sheet is used as a cathode, and electroplating is carried out; 3. preparation of an zinc electroplating solution; 4. the prepared zinc electroplating solution is added into the electroplating bath, the platinum sheet in the step 2 is used as an anode, the iron sheet with electroplated tin is used as a cathode, and electroplating is carried out; 5. after electroplating, the iron sheet is cleaned and dried, and the iron-zinc-tin alloy cathode material is obtained.

Description

Technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a method for preparing a negative electrode material for lithium ion batteries. Background technique [0002] At present, the anode materials for lithium-ion batteries used in the market are mainly graphite materials, and their theoretical specific capacity is relatively low, and performance such as cycle performance and capacity needs to be improved. Improved performance of anode materials for lithium-ion batteries. There is no solvent co-embedding during the charging and discharging process of metal tin alloy material, and no peeling phenomenon similar to graphite material will occur, but expansion or contraction is prone to occur during the charging and discharging cycle. How to choose a suitable metal and electroplating process is important to overcome the above The disadvantages are especially important. Summary of the invention [0003] In view of the problems in the prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38H01M4/42H01M4/1395H01M10/0525C25D3/30C25D3/32C25D3/22
CPCC25D3/22C25D3/30C25D3/32H01M4/1395H01M4/38H01M4/387H01M4/42H01M10/0525Y02E60/10
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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