Tin-based oxide negative electrode material and preparation method and application thereof

A negative electrode material and oxide technology, applied in the field of tin-based oxide negative electrode material and its preparation, can solve the problems of weakening the advantages of high capacity, large irreversible capacity, and reducing specific capacity, and achieve long service life, high safety, specific capacity and so on. High volume effect

Pending Publication Date: 2021-06-01
KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it will cause volume expansion due to the intercalation/deintercalation of lithium ions during the cycle, and the first irreversible capacity is huge, which makes the specific capacity of t

Method used

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  • Tin-based oxide negative electrode material and preparation method and application thereof
  • Tin-based oxide negative electrode material and preparation method and application thereof
  • Tin-based oxide negative electrode material and preparation method and application thereof

Examples

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Example Embodiment

[0045]Example 1

[0046]1) A zinc zinc acetate solution was disposed of 0.01 mol / ml in DMF, and then the zipynetoic acid having a zinc acetate was 1: 1, at 80 ° C, heat-insulation 10h for solvent thermally reactive synthesis metal organic skeleton material.

[0047]2) Taking ethylenediamine as a solvent, a metal organic skeleton material of molar ratio of 0.1: 1 is sufficiently dissolved by ultrasound and magnetic stirring, wherein the solid-liquid ratio of tin chloride and ethylenediamine is 0.5 mol / ml. . Subsequently, the heat reactive reaction was carried out at 80 ° C for 10 h, and the metal organic skeleton material for the load tin was produced.

[0048]3) Get the metal organic skeleton material of the load in the inert atmosphere, calcined at 800 ° C to obtain a composite negative electrode material of the metal skeleton load tin based oxide.

Example Embodiment

[0049]Example 2

[0050]1) A zinc acetate solution was disposed of 0.01 mol / ml in DMF, and then added and zinc acetate molar ratio of 2: 1 of terephthalic acid, at 80 ° C, heat-insulation 15h for solvent thermal reaction synthesis metal organic skeleton material.

[0051]2) Taking ethylenediamine as a solvent, a metal organic skeleton material of molar ratio of 0.1: 1 is sufficiently dissolved by ultrasound and magnetic stirring, wherein the solid-liquid ratio of tin chloride and ethylenediamine is 0.5 mol / ml. . Then, at 80 ° C, the heat reaction was thermally reacted, and the metal organic skeleton material for the load tin was produced.

[0052]3) The metal organic skeleton material of the load tin is calcined in an inert atmosphere, and 1 h is calcined at 700 ° C to obtain a composite negative electrode material of the metal skeleton load tin based oxide.

Example Embodiment

[0053]Example 3

[0054]1) A zinc acetate solution was disposed of 0.02 mol / ml in DMF, then added and acetate of zinc acetate molar ratio of 2: 1, with a phenylene terephthalic acid having a zinc acetate, at 100 ° C, heat-insulation 8h for solvent thermally reactive synthesis metal organic skeleton material.

[0055]2) Taking ethylenediamine as a solvent, the metal organic skeleton material of molar ratio 1: 1 is sufficiently dissolved by ultrasound and magnetic stirring, wherein the solid-liquid ratio of tin chloride and ethylenediamine is 0.5 mol / ml. . Then, at 80 ° C, the heat reaction was thermally reacted, and the metal organic skeleton material for the load tin was produced.

[0056]3) The metal organic skeleton material of the load tin is calcined at an inert atmosphere, and 1.5 h is calcined at 700 ° C to obtain a composite negative electrode material of the metal skeleton load tin based oxide.

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Abstract

The invention discloses a tin-based oxide negative electrode material and a preparation method and application thereof. The preparation method comprises the steps of (1) mixing metal acetate, a cyclic carboxylic acid ligand and N,N-dimethylformamide, and carrying out a first solvothermal reaction so as to obtain a metal organic framework material; (2) mixing the metal organic framework material with tin chloride and ethidene diamine, and carrying out a second solvothermal reaction to obtain a tin-loaded metal organic framework material; and (3) calcining the tin-loaded metal organic framework material in an inert atmosphere so as to obtain the composite negative electrode material with the tin-based oxide loaded on the metal framework. The preparation method is simple in process, and the prepared negative electrode material has relatively high specific capacity and relatively good electrochemical performance and structural stability.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a tin-based oxide negative electrode material and a preparation method and application thereof. Background technique [0002] Tin-based oxide anode materials are cheap, easy to prepare, and have high specific capacity, which once became the focus of research on anode materials for lithium-ion batteries. However, it will cause volume expansion due to the intercalation / deintercalation of lithium ions during the cycle, and the first irreversible capacity is huge, which makes the specific capacity of the tin-based oxide negative electrode material greatly reduced after the first cycle, which greatly weakens the performance of tin-based materials as lithium. The high capacity advantage of ion battery anode materials. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, a...

Claims

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Application Information

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IPC IPC(8): H01M4/48H01M4/62H01M4/131H01M10/0525
CPCH01M4/131H01M4/483H01M4/628H01M10/0525H01M2004/021H01M2004/027Y02E60/10
Inventor 万玲玲齐士博吕豪杰
Owner KUNSHAN BAOTRON NEW ENERGY TECH CO LTD
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