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Phosphorus, sulfur and selenium series anode materials with adjustable composition and structure for ion batteries

A negative electrode material and ion battery technology, applied in battery electrodes, structural parts, secondary batteries, etc., can solve the problems of low capacity, poor cycle stability, and poor rate performance, and achieve high capacity, good rate performance, and easy structure recovery Effect

Active Publication Date: 2021-03-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a phosphorus-sulfur-selenide series negative electrode material with adjustable composition and structure for ion batteries, which is used to solve the problems of low capacity, poor rate performance and poor cycle stability in the prior art. defect

Method used

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  • Phosphorus, sulfur and selenium series anode materials with adjustable composition and structure for ion batteries
  • Phosphorus, sulfur and selenium series anode materials with adjustable composition and structure for ion batteries
  • Phosphorus, sulfur and selenium series anode materials with adjustable composition and structure for ion batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment is for the preparation of amorphous non-crystalline P 4 S 3 specific example.

[0028] Weigh 2.8147g of phosphorus powder with a purity of 99.9% and 2.1853g of sulfur powder with a purity of 99.9% respectively, mix them, and then ball mill them in a ball mill tank for 10 hours under nitrogen protection with a spherical mass ratio of 25:1 and a rotational speed of 1200r / min. , get P 4 S 3 ; Wherein, the material of ball milling tank and ball milling beads is stainless steel.

[0029] Through X-ray diffraction analysis and elemental quantitative analysis, it is obtained that the atomic ratio of the prepared sample is P:S=4:3, and the sample is an amorphous substance.

Embodiment 2

[0031] This embodiment is for the preparation of amorphous non-crystalline P 4 Se 3 specific example.

[0032] Weigh respectively 1.7171g of phosphorus powder with a purity of 99.9%, and 3.2829g of selenium powder with a purity of 99.9%, mix them, and then ball mill them in a ball mill tank under the protection of argon with a spherical mass ratio of 25:1 and a rotational speed of 1200r / min. 10h, get P 4 Se 3 ; Wherein, the material of the ball milling pot and the ball milling beads is hard alloy.

[0033] Through X-ray diffraction analysis and elemental quantitative analysis, it is obtained that the atomic ratio of the prepared sample is P:Se=4:3, and the sample is an amorphous substance.

Embodiment 3

[0035] This embodiment is for the preparation of amorphous non-crystalline P 4 SSe 2 specific example.

[0036] Take by weighing respectively 99.9% phosphorus powder 1.9736g, 99.9% sulfur powder 0.5108g and 99.9% selenium powder 2.5156g after mixing, under nitrogen and argon mixed gas protection, spherical mass ratio is 25:1, rotating speed Under the condition of 1100r / min, ball milling in a ball mill jar for 10h, P 4 SSe 2 ; Wherein, the material of ball milling tank and ball milling beads is stainless steel.

[0037] Through X-ray diffraction analysis and element quantitative analysis, it is obtained that the atomic ratio of the prepared sample is P:S:Se=4:1:2, and the sample is an amorphous substance.

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Abstract

The invention belongs to the field of an ion battery material, and particularly relates to a phosphorus sulfur selenium serial negative electrode material used for an ion battery and with a regulableconstituent structure. The invention provides an ion battery negative electrode material which is amorphous state P<4>S<x>Se<3-x>, wherein x is 0, or 1, or 2 or 3. The invention also provides a preparation method of the ion battery negative electrode material. The invention also provides the ion battery negative electrode material or an application of a product obtained by the preparation method in the fields of a lithium ion battery and / or a sodium ion battery. Test measurement proves that the product prepared by the technical scheme in the invention has the advantages of high capacity, highrate capability and high cycle performance; the product adopts the amorphous type product structure, so that the short-range order structure can be recovered more easily, and stability of an electrodematerial in the charging-discharging process can be facilitated; and the technical defects of low capacity, poor rate capability and poor cycle stability of the ion battery negative electrode material in the prior art can be solved.

Description

technical field [0001] The invention belongs to the field of ion battery materials, in particular to phosphorus, sulfur and selenium series negative electrode materials with adjustable component structure for ion batteries. Background technique [0002] The increasingly depleted non-renewable energy and the deteriorating natural environment have inspired human pursuit of new renewable energy. To this end, humans continue to develop new types of renewable energy such as wind energy, solar energy, and tidal energy, and use static energy storage power stations to store them to improve their energy utilization efficiency. At the same time, electric vehicles and portable electronic devices are gradually entering people's lives. At present, in the field of energy storage, lithium-ion batteries have been used in mobile energy storage fields such as 3C electronic products and electric vehicles due to their environmental protection, high energy density, and high operating voltage; s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/58H01M10/0525H01M10/054
CPCH01M4/581H01M4/5815H01M10/0525H01M10/054Y02E60/10
Inventor 余家乐张海燕李文武张宇杰
Owner GUANGDONG UNIV OF TECH