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Preparation method of lithium ion battery electrode sheet

A lithium-ion battery and electrode sheet technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low charge and discharge capacity, poor cycle stability of lithium-ion battery electrode sheets, etc.

Inactive Publication Date: 2015-10-14
HYB BATTERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally, the lithium-ion battery sulfide electrode material is lithium iron sulfide, and the prepared lithium-ion battery electrode sheet has the defects of poor cycle stability and low charge-discharge capacity.

Method used

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  • Preparation method of lithium ion battery electrode sheet
  • Preparation method of lithium ion battery electrode sheet
  • Preparation method of lithium ion battery electrode sheet

Examples

Experimental program
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preparation example Construction

[0023] Such as figure 2 As shown, in one embodiment NbS 2 The preparation method of electrode material comprises the following steps:

[0024] Step S110, under vacuum conditions, the molar ratio of elemental Nb and elemental sulfur satisfies 1:2-2.30, mixing and grinding the two for 1-2 hours, and applying 1-10 tons of pressure to the mixture to obtain a reaction precursor;

[0025] Because elemental sulfur and elemental niobium are relatively active, if they are directly oxidized to oxides under aerobic and high-temperature environments, it is difficult to obtain the desired substances. In order to prevent the elemental substance added from reacting with the oxygen in the air in the subsequent high-temperature reaction, the weighing must be carried out under anhydrous and oxygen-free conditions, so that the elemental niobium and elemental sulfur undergo a chemical reaction under heating. Among them, the device without water and oxygen is a glove box. Generally, when weigh...

Embodiment 1

[0039] A lithium ion battery electrode sheet, comprising 75g of the above-mentioned NbS 2 Electrode material, 20g acetylene black, 5g polytetrafluoroethylene.

[0040] The preparation method of above-mentioned lithium ion battery electrode sheet is:

[0041] Weigh NbS 2 Grind the electrode material and acetylene black for 1 hour, then add polytetrafluoroethylene and continue grinding for 1 hour, roll and press to the required thickness and cut to the required size to obtain the lithium ion battery electrode sheet.

[0042] Among them, NbS 2 The preparation method of electrode material, comprises the following steps:

[0043] (1) Weigh elemental niobium and elemental sulfur in a molar ratio of 1:2.1, grind them with an agate mortar for 1 hour and mix well; put the evenly mixed powder into a mold, and apply 3 tons of pressure to compact it The higher reaction precursor is put into a dried quartz tube with one end sealed; at the same time, the other end of the quartz tube is ...

Embodiment 2

[0055] A lithium ion battery electrode sheet, including 70g of the above-mentioned NbS 2 Electrode material, 20g acetylene black, 10g polytetrafluoroethylene.

[0056] The preparation method of above-mentioned lithium ion battery electrode sheet is:

[0057] Weigh NbS 2 The electrode material and acetylene black were ground for 1.5 hours, then added polytetrafluoroethylene and continued to grind for 0.5 hours, rolled to the required thickness and cut into the required size to obtain lithium-ion battery electrode sheets.

[0058] Among them, NbS 2 The preparation method of electrode material, comprises the following steps:

[0059] (1) Weigh the elemental niobium and elemental sulfur in a molar ratio of 1:2.14, grind them with an agate mortar for 1.5 hours and mix them evenly; put the evenly mixed powder into a mold, and apply a pressure of 1 ton to compact it The higher reaction precursor is put into a dried quartz tube with one end sealed; at the same time, the other end ...

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Abstract

The invention discloses an electrode piece of a lithium ion battery and the lithium ion battery. The electrode piece of the lithium ion battery is made of a mixture formed by mixing an NbS2 electrode material with a 3R structure, a conducting agent and a bonding agent. The NbS2 with a stratified structure is used as the electrode material and lithium ions can be freely embedded and released from a sandwich layer, so as to form a substance of a lithium releasing and embedding structure of a 3R-LixNbS2 (x is more than or equal to 0 and less than or equal to 1). An Nb4<+> / Nb3<+> power is used for carrying out reversible reduction and oxidization, so that the electrode piece of the lithium ion battery has high initial capacity and good circulation stability. The invention further discloses the lithium ion battery adopting the electrode piece of the lithium ion battery.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a preparation method of electrode sheets of lithium ion batteries. Background technique [0002] Compared with other traditional energy storage batteries, lithium-ion batteries have the advantages of high energy / power density, less environmental pollution, and long service life, and have been widely used as portable power sources. With the in-depth research on these materials and the maturity of the technology, the application fields of lithium-ion batteries are wider, and they are no longer satisfied with small electronic products such as notebook computers. They are also gradually showing their superiority in large-scale power supplies such as power vehicles. performance. With the continuous resolution of the key technologies of large-scale power lithium batteries, the application fields of lithium-ion batteries will be further expanded. [0003] In fact, as early as 1976...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M4/136H01M10/0525
CPCY02E60/122Y02E60/10
Inventor 廖友好李伟善谢惠丽冯岸柏冯洪亮傅昭蒋小华杨禹超冯艺丰
Owner HYB BATTERY