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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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  • Summary
  • 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 tin-based oxide anode materials greatly reduced after the first cycle, which greatly weakens the performance of tin-based materials as lithium. High Capacity Advantages of Ion Battery Anode Materials

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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Effect test

Embodiment 1

[0046] 1) Prepare a 0.01mol / mL zinc acetate solution with DMF as a solvent, then add phthalic acid with a molar ratio of 1:1 to zinc acetate, and heat at 80°C for 10 hours for solvothermal reaction to synthesize metal-organic framework materials.

[0047] 2) Using ethylenediamine as a solvent, fully dissolve the metal-organic framework material and tin chloride with a molar ratio of 0.1:1 by ultrasonic and magnetic stirring, wherein the solid-liquid ratio of tin chloride to ethylenediamine is 0.5mol / mL . Then, the solvothermal reaction was carried out at 80° C. and kept for 10 h to prepare the metal-organic framework material loaded with tin.

[0048] 3) Calcining the metal-organic framework material loaded with tin in an inert atmosphere at 800° C. for 0.5 h to obtain a composite negative electrode material with tin-based oxide loaded on the metal framework.

Embodiment 2

[0050] 1) Prepare a 0.01mol / mL zinc acetate solution with DMF as a solvent, then add phthalic acid with a molar ratio of 2:1 to zinc acetate, and heat at 80°C for 15 hours for solvothermal reaction to synthesize metal-organic framework materials.

[0051] 2) Using ethylenediamine as a solvent, fully dissolve the metal-organic framework material and tin chloride with a molar ratio of 0.1:1 by ultrasonic and magnetic stirring, wherein the solid-liquid ratio of tin chloride to ethylenediamine is 0.5mol / mL . Then, the solvothermal reaction was carried out at 80° C. and kept for 15 hours to prepare the metal-organic framework material loaded with tin.

[0052] 3) Calcining the metal-organic framework material loaded with tin in an inert atmosphere at 700° C. for 1 h to obtain a composite negative electrode material with tin-based oxide loaded on the metal framework.

Embodiment 3

[0054] 1) Prepare a 0.02mol / mL zinc acetate solution with DMF as a solvent, then add phthalic acid with a molar ratio of 2:1 to zinc acetate, and heat at 100°C for 8 hours for solvothermal reaction to synthesize metal-organic framework materials.

[0055] 2) Using ethylenediamine as a solvent, fully dissolve the metal-organic framework material and tin chloride with a molar ratio of 1:1 by ultrasonic and magnetic stirring, wherein the solid-liquid ratio of tin chloride to ethylenediamine is 0.5mol / mL . Then, the solvothermal reaction was carried out at 80° C. and kept for 15 hours to prepare the metal-organic framework material loaded with tin.

[0056] 3) Calcining the metal-organic framework material loaded with tin in an inert atmosphere at 700° C. for 1.5 h to obtain a composite negative electrode material with tin-based oxide loaded on the metal framework.

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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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