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Composite elemental phosphorus with favorable crystallinity and preparation method and application thereof

A technology of elemental phosphorus and crystallinity, applied in the field of elemental phosphorus, can solve problems such as poor cycle performance and large first-time irreversible specific capacity, and achieve the effects of low cost, controllable synthesis conditions, and easy-to-obtain raw materials

Active Publication Date: 2017-08-11
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the primary irreversible specific capacity and poor cycle performance of elemental phosphorus anode materials generally exist, so the application of elemental phosphorus anode materials is still a challenge.

Method used

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  • Composite elemental phosphorus with favorable crystallinity and preparation method and application thereof
  • Composite elemental phosphorus with favorable crystallinity and preparation method and application thereof
  • Composite elemental phosphorus with favorable crystallinity and preparation method and application thereof

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preparation example Construction

[0023] The present invention also provides a method for preparing the above-mentioned composite elemental phosphorus with good crystallinity, the preparation method comprising:

[0024] 1) carrying out solvothermal reaction with amorphous red phosphorus and nitrogen-containing compound under airtight conditions;

[0025] 2) The system solution is post-treated to produce complex elemental phosphorus.

[0026] In step 1) of the above-mentioned preparation method, the consumption of material can be selected in a wide range, but in order to make the composite elemental phosphorus obtained have more excellent crystallinity, specific capacity, structural stability and cycle performance; preferably , in step 1), the dosage ratio of amorphous red phosphorus to nitrogen-containing compound is (0.3-2.5g): (30-50mL). More preferably, in step 1), the dosage ratio of amorphous red phosphorus to nitrogen-containing compound is (0.4-0.6g): (30-50mL).

[0027] In step 1) of the above prepar...

Embodiment 1

[0034] Weigh 0.5g of amorphous red phosphorus and put it into the reaction kettle, add 40mL of ethylenediamine to it to make a suspension and seal it; then, react at 200°C for 48 hours; finally, the system solution is centrifuged, washed, The precipitate was dried at 70°C for 15 hours to obtain complex elemental phosphorus A1 (brown-black lumpy particles).

Embodiment 2

[0036] Composite elemental phosphorus A2 (brown black massive particles) was obtained according to the method of Example 1, except that the amount of amorphous red phosphorus was 1.0 g.

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Abstract

The invention discloses composite elemental phosphorus with favorable crystallinity and a preparation method and application thereof. The composite elemental phosphorus comprises red phosphorus and black phosphorus and is a brownish black block-shaped particle. The preparation method comprises the steps of 1) performing solvothermal reaction on amorphous red phosphorus and a nitrogen-containing compound in a closed condition; and 2) performing post-treatment on a system solution to obtain the composite elemental phosphorus. The invention further provides the application of the composite elemental phosphorus with favorable crystallinity in a lithium ion battery. The composite elemental phosphorus has excellent crystallinity, specific capacity, structural stability and cycle performance; and moreover, the preparation method has the advantages of simple process, available raw material, low cost, good repeatability and controllable synthesis condition.

Description

technical field [0001] The invention relates to elemental phosphorus, in particular to compound elemental phosphorus with good crystallinity and its preparation method and application. Background technique [0002] In today's era of energy crisis and energy revolution, the development of new energy has become the theme of the times, so the research on new energy materials is imperative. Generally speaking, the new energy sources that have been discovered include wind energy, solar energy, tidal energy, etc.; however, the utilization of new energy sources is not as easy as imagined. In terms of wind energy and solar energy, for the vast rural areas and communities, batteries are used to store wind energy and Solar energy is the best solution to construct decentralized energy sources; however, since both wind energy and solar energy are interstitial energy sources, they can only be used when there is wind or sun, and it is difficult to store electric energy for a long time. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M10/0525C01B25/00C01B25/02
CPCC01B25/003C01B25/02H01M4/364H01M4/38H01M10/0525Y02E60/10
Inventor 赵月荧曾培源方臻
Owner ANHUI NORMAL UNIV
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