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Spinel type composite metal oxide electrode material and preparing process thereof

A composite metal and spinel-type technology, which is applied in electrode manufacturing, chemical instruments and methods, iron compounds, etc., can solve problems such as high cost, difficult industrialization, and complicated process, and achieve low energy consumption, convenient operation, and process simple effect

Inactive Publication Date: 2006-01-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a spinel-type composite metal oxide electrode material and its preparation method, which solves the problems of complex process, high cost and difficulty in industrialization

Method used

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  • Spinel type composite metal oxide electrode material and preparing process thereof

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Embodiment 1

[0016] CoSO 4 ·7H 2 O, FeSO 4 ·7H 2 O, Fe 2 (SO 4 ) 3 Moore Co 2+ / Fe 2+ / Fe 3+ = 3 / 5 / 2 ratio mixed, dissolved by N 2 In deionized water, make a salt solution with a total concentration of metal ions of 0.8mol / L, in N 2 Under protection, the NaOH solution with a concentration of 1.5 mol / L was slowly added dropwise to the salt solution, and when the pH value was 8.0, the dropwise addition of lye was stopped. The reactant was crystallized in a water bath at 50° C. for 3 hours, and the reaction was terminated. by N 2 Wash the product with degassed ice water, and then wash with ethanol at 0-5°C to remove unreacted metal ions, and dry the sample in air.

[0017] The dried Co-Fe 2+ -Fe 3+ -LDHs were placed in a muffle furnace, heated to 800°C at a rate of 10°C / min, kept for 1 hour, and cooled to room temperature with the furnace. The content of metal ions in the product was measured by Japan Shimadzu ICPS-7500 inductively coupled plasma emission spectrometer, and its ...

Embodiment 2

[0019] NiSO 4 ·6H 2 O, FeSO 4 ·7H 2 O, Fe 2 (SO 4 ) 3 Moore than Ni 2+ / Fe 2+ / Fe 3+ = 3 / 5 / 2 ratio mixed, dissolved by N 2 In deionized water, make a solution with a total concentration of metal ions of 1.0mol / L, in N 2Under protection, the NaOH solution with a concentration of 1.0 mol / L was slowly added dropwise to the salt solution, and when the pH value reached 6.5, the dropwise addition of lye was stopped. The reactant was crystallized in a water bath at 30° C. for 5 hours to complete the reaction. by N 2 Wash the product with degassed ice water, then wash with ethanol at 0-5°C to remove unreacted metal ions, and dry the sample in air.

[0020] The dried Ni-Fe 2+ -Fe 3+ - LDHs were placed in a muffle furnace, heated to 650°C at a rate of 5°C / min, kept for 3 hours, then cooled to room temperature with the furnace, ICP and XRD tests showed that the product was spinel NiFe with a single crystal phase 2 o 4 .

Embodiment 3

[0022] NiSO 4 ·6H 2 O, ZnSO 4 ·7H 2 O, FeSO 4 ·7H 2 O, Fe 2 (SO 4 ) 3 Moore than Ni 2+ / Zn 2+ / Fe 2+ / Fe 3+ = 1 / 2 / 5 / 2 ratio mixed, dissolved by N 2 In deionized water, make a solution with a total concentration of metal ions of 0.8mol / L, in N 2 Under protection, the NaOH solution with a concentration of 1.5 mol / L was slowly added dropwise to the salt solution, and when the pH value reached 7, the dropwise addition of lye was stopped. The reactant was crystallized in a water bath at 40° C. for 4 hours, and the reaction was terminated. by N 2 Wash the product with degassed ice water, then wash with ethanol at 0-5°C to remove unreacted metal ions, and dry the sample in air.

[0023] The dried Ni-Zn-Fe 2+ -Fe 3+ -LDHs were placed in a muffle furnace, heated to 700°C at a rate of 10°C / min, kept for 2 hours, then cooled to room temperature with the furnace, ICP and XRD tests showed that the product was spinel Ni with a single crystal phase 1 / 3 Zn 2 / 3 Fe 2 o 4 . ...

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Abstract

This invention provides a spinel compound metal oxide electrode material and its preparation method, in which, the composition of the electrode material is Mfe204, M is one element or composition of any two elements in Co, Ni Cu and Fe of +2 valence transition metal elements. Taking compound metal oxide M-Fe2+-Fe3+|-LDHs as the precursor and M is one element or composition of any two elements in Co, Ni, Cu, Fe elements, the electrode material is got by baking them under a certain temperature, compared with carbon materials, said electrode material has higher mass ratio capacity and volume ratio capacity.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery materials and their preparation, and in particular provides a spinel-type composite metal oxide electrode material and a preparation method thereof, and relates to a spinel-type composite metal oxide lithium-ion battery negative electrode material And the preparation method adopts the layered double hydroxyl compound metal oxide as the precursor. Background technique [0002] At present, the mainstream anode materials of commercial lithium-ion batteries are various carbon materials, such as artificial graphite, natural graphite, and mesophase pitch-based carbon microspheres. Although carbon materials have been widely used, they still have disadvantages such as low mass specific capacity, low material density, and poor oxidation resistance. Therefore, people are constantly researching and developing new negative electrode materials for lithium-ion batteries. In 2000, P.Poizot et al. f...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/48H01M4/04C01G1/02C01G49/00H01M4/131H01M4/52H01M4/525H01M10/052H01M10/058H01M10/36
CPCY02E60/122H01M4/525H01M10/052H01M4/04H01M10/058H01M4/131Y02E60/10Y02P70/50
Inventor 段雪杨文胜李晓丹
Owner BEIJING UNIV OF CHEM TECH
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