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Fe2O3 porous nanowire electrode material, and preparation method and application thereof

A technology of porous nanowires and electrode materials, which is applied in the field of electrochemical materials, can solve the problems of limiting the commercial application of iron-based oxides, poor electrical conductivity of iron-based oxides, and the decline in the performance of lithium-ion batteries, so as to benefit the electrolyte. Effects of penetration, shortening ion transmission distance, and suppressing volume expansion effect

Active Publication Date: 2019-10-25
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a Fe 2 o 3 The porous nanowire electrode material, preparation method and application solve the problem of poor electrical conductivity of iron-based oxides in the prior art, and obvious volume changes during charging and discharging, which lead to a sharp decline in the performance of lithium-ion batteries, thereby limiting the commercialization of iron-based oxides application problem

Method used

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  • Fe2O3 porous nanowire electrode material, and preparation method and application thereof
  • Fe2O3 porous nanowire electrode material, and preparation method and application thereof
  • Fe2O3 porous nanowire electrode material, and preparation method and application thereof

Examples

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Embodiment 1

[0031] A kind of stainless steel base Fe 2 o 3 A method for preparing a porous nanowire electrode material, comprising the steps of:

[0032] (1) Put the stainless steel sheet current collector at a concentration of 2mol L -1 Soak in the HCl solution for 15 minutes, then wash with deionized water to remove organic and inorganic impurities, and dry for later use;

[0033] (2) ZnO seed crystal preparation:

[0034] Weigh 1mmol of zinc acetate and 1mmol of triethanolamine, add 50mL of ethanol to prepare a mixed solution A, immerse the cleaned stainless steel sheet current collector in the mixed solution A and slowly take it out, repeat 5 times, dry it, and put it in a tube furnace. Calcined at 350°C for 1 hour to obtain ZnO seed crystals;

[0035] (3) Preparation of ZnO nanoarrays:

[0036] Weigh 1mmol of zinc chloride, 1mmol of hexamethylenetetramine, and 1g of nonylphenol polyoxyethylene ether, add 40mL of deionized water to prepare a mixed solution B, pour the mixed solut...

Embodiment 2

[0040] A metal nickel mesh based Fe 2 o 3 A method for preparing a porous nanowire electrode material, comprising the steps of:

[0041] (1) Put a nickel foam current collector with a thickness of 1mm in a concentration of 2mol L -1 Soak in the HCl solution for 15 minutes, remove organic and inorganic impurities, and dry for later use;

[0042](2) ZnO seed crystal preparation

[0043] Weigh 3mmol of zinc chloride and 3mmol of triethanolamine, add 80mL of ethanol to make a mixed solution A, immerse the cleaned foamed nickel current collector in the mixed solution A and take it out slowly, repeat 10 times, dry it, and put it in a tube furnace , calcined at 500°C for 2 hours to obtain ZnO seed crystals;

[0044] (3) Preparation of ZnO nanoarrays:

[0045] Weigh 3mmol zinc chloride, 3mmol hexamethylenetetramine, 5g polyoxyethylene (molecular weight is 2000), add 60mL deionized water to configure mixed solution B, pour mixed solution B into the inner tank of the hydrothermal k...

Embodiment 3

[0049] A carbon cloth loaded with Fe 2 o 3 A method for preparing a porous nanowire electrode material, comprising the steps of:

[0050] (1) Arrange the hydrophilic carbon at a concentration of 2mol L -1 HNO 3 Soak in the solution for 15 minutes, then wash with deionized water to remove organic and inorganic impurities, and dry for later use;

[0051] (2) ZnO seed crystal preparation:

[0052] Weigh 1.5mmol of zinc nitrate and 1.2mmol of triethanolamine, add 50mL of ethanol to make a mixed solution A, immerse the cleaned stainless steel sheet current collector in the mixed solution A and take it out slowly, repeat 10 times, dry it, and put it in a tube furnace , calcination at 500°C for 1 h to obtain ZnO seed crystals;

[0053] (3) Preparation of ZnO nanoarrays:

[0054] Weigh 2mmol of zinc sulfate, 2mmol of hexamethylenetetramine, and 1.3g of lauryl polyoxyethylene ether, add 50mL of deionized water to configure a mixed solution B, pour the mixed solution B into the in...

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Abstract

The invention discloses a Fe2O3 porous nanowire electrode material, and a preparation method and application thereof. The preparation method comprises the following steps of ZnO seed crystal preparation, ZnO nano array preparation and Fe2O3 porous nanowire preparation. A metal current collector or a carbon material current collector is taken as a substrate, firstly, a ZnO nano array is prepared through a hydrothermal method, the Fe2O3 porous nanowire electrode material is prepared through a second hydrothermal method, the length of the prepared Fe2O3 nanowire electrode material is about 1 [mu]m, the diameter of the Fe2O3 nanowire electrode material is within 20 nm to 80 nm, and the Fe2O3 porous nanowire electrode material is of a porous structure and is bonded firmly with a matrix. The prepared Fe2O3 porous nanowire electrode material has the characteristics of high cyclic stability and excellent rate performance, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of electrochemical materials, and specifically discloses a Fe 2 o 3 Porous nanowire electrode material, preparation method and application. Background technique [0002] At present, the commercial lithium-ion battery anode materials are mainly graphite materials, and its theoretical specific capacity is about 372mAh g -1 , high-current charge and discharge are prone to lithium precipitation, and this performance bottleneck greatly restricts the further development and application of lithium-ion batteries. Compared with graphite anode materials, transition metal oxides have extremely high theoretical lithium storage capacity, for example, Fe 2 o 3 The theoretical specific capacity is as high as 1007mAh g -1 ,Co 3 o 4 The specific capacity is about 890mAh·g -1 , SnO 2 The theoretical specific capacity is 780mAh·g -1 . Among them, iron-based oxides have been widely studied because of their advantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82Y30/00H01M4/52H01M10/0525H01M4/02
CPCH01M4/523H01M10/0525B82Y30/00H01M2004/027H01M2004/021Y02E60/10
Inventor 李浩钞春英范留群张胜果范欢欢
Owner XUCHANG UNIV
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