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Pre-sodiumized sodium-ion secondary battery negative electrode material and mechanical pre-sodiumized method thereof

A secondary battery, battery negative electrode technology, applied in the direction of secondary battery, battery electrode, electrode manufacturing, etc., to achieve the effect of improving safety, universal applicability, and short production time

Active Publication Date: 2021-11-09
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the pre-sodiumization method of anode materials for sodium-ion batteries.

Method used

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  • Pre-sodiumized sodium-ion secondary battery negative electrode material and mechanical pre-sodiumized method thereof
  • Pre-sodiumized sodium-ion secondary battery negative electrode material and mechanical pre-sodiumized method thereof
  • Pre-sodiumized sodium-ion secondary battery negative electrode material and mechanical pre-sodiumized method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] figure 1 It is a schematic diagram of mechanical pre-sodiumization of pure tin foil and sodium metal sheet in Example 1 of the present invention.

[0030] Such as figure 1 As shown, the mechanical pre-sodiumization method based on the negative electrode material of the sodium ion secondary battery of the present embodiment includes the following steps:

[0031] Step 1, prepare 100μm tin foil.

[0032] Step 2, in a glove box, roll out a sodium metal sheet with a thickness of 50 μm.

[0033] Step 3, placing the sodium metal sheet and tin foil in a dry environment in a glove box and bonding the sodium metal sheet and tin foil flatly together to obtain a bonding material.

[0034] Step 4, using a cold press to press the bonded material for 10 minutes under a pressure of 30 MPa to obtain a pre-sodiumized negative electrode material for a sodium ion secondary battery.

[0035] figure 2 It is an actual picture of the negative electrode material of the sodium ion secondar...

Embodiment 2

[0041] The mechanical pre-sodiumization method based on the negative electrode material of the sodium ion secondary battery of the present embodiment comprises the following steps:

[0042] Step 1, prepare a tin-based alloy foil of 15 μm-100 μm, the tin-based alloy foil can be Cu-Sn, Co-Sn, Ag-Sn, Cu-Ag-Sn, Zn-Sn, Sb-Sn, Bi-Sn, In-Sn, In-Bi-Sn and other tin alloys;

[0043] Step 2, in a glove box, roll out a sodium metal sheet with a thickness of 1 / 10-1 of the thickness of the tin-based alloy foil.

[0044] In step 3, the sodium metal sheet and the tin-based alloy foil are placed in a dry environment in a glove box, and the sodium metal sheet and the tin-based alloy foil are flatly bonded together to obtain a bonded material.

[0045] Step 4, the distance between the two rollers of the roller press is set to be less than the total thickness of the laminated material, the laminated material is rolled 5 times by the roller press and the two rollers are rolled after each roll T...

Embodiment 3

[0047]The mechanical pre-sodiumization method based on the negative electrode material of the sodium ion secondary battery of the present embodiment comprises the following steps:

[0048] Step 1: Mix tin powder or hard carbon powder with a conductive agent and a binder, stir evenly, coat on a copper current collector and dry to prepare a sheet-shaped battery negative electrode sheet with a thickness of 15 μm-100 μm.

[0049] Step 2, in a glove box, roll out a sodium metal sheet with a thickness of 5 μm-100 μm.

[0050] Step 3, placing the sodium metal sheet and the sheet-shaped battery negative electrode sheet in the glove box and attaching the sodium metal sheet and the sheet-shaped battery negative electrode sheet together;

[0051] Step 4, using a hot press at a temperature of 40-80° C. and a pressure of 8 MPa to press the bonded material for 5 minutes to 2 hours to obtain a negative electrode material for a sodium ion secondary battery after pre-sodiumization. Function a...

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Abstract

The invention provides a negative electrode material of a sodium ion secondary battery after pre-sodiumization and a mechanical pre-sodiumization method, the mechanical pre-sodiumation method comprises the following steps: Step 1, preparing a sheet-shaped battery negative electrode material with a predetermined thickness; Step 2 , in the glove box, prepare a sodium metal sheet with a predetermined thickness; step 3, place the sodium metal sheet and the sheet-shaped battery negative electrode material in a dry environment and attach the sodium metal sheet and the sheet-shaped negative electrode material flatly on the Obtain the laminated material together; step 4, press the laminated material with a pressure device to completely embed the sodium metal sheet in the sheet-shaped negative electrode material, and obtain the negative electrode material of the sodium ion secondary battery after pre-sodiumization.

Description

technical field [0001] The invention belongs to the field of battery negative electrode materials, and in particular relates to a pre-sodiumized sodium ion secondary battery negative electrode material and a mechanical pre-sodiumized method thereof. Background technique [0002] With the development of society and the continuous growth of the world's population, human beings' demand for energy is increasing, and the development of advanced energy storage technology is the key to rational and efficient use of energy. Clean secondary energy represented by lithium-ion batteries has the advantages of high energy conversion rate, high energy density, and less pollution, and is widely favored in all walks of life. However, the natural abundance of lithium is only about 0.0065%. The resource reserves and cost of lithium will seriously restrict the development of lithium-ion batteries in the future. Sodium and lithium belong to the first main group, have similar physical and chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/134H01M4/1395H01M10/054
CPCH01M4/043H01M4/134H01M4/1395H01M10/054Y02E60/10
Inventor 胥会李洒黄云辉刘文健陈鑫龙张灿
Owner TONGJI UNIV