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Method for synthesizing copper nanowire gel by one-pot method

A copper nanowire and gel technology, which is applied in the field of one-pot synthesis of copper nanowire gel, can solve the problems of single function of negative electrode current collector and less research on negative electrode current collector, and achieve easy industrial scale-up, low requirements for experimental equipment, The effect of high product yield

Inactive Publication Date: 2017-02-22
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most lithium-ion battery manufacturers at home and abroad mostly use electrolytic copper foil to make electrode and negative electrode current collectors. Traditional lithium batteries have a lot of research on positive electrode materials and negative electrode materials, but there are very few studies on negative electrode current collectors. The function is relatively simple

Method used

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  • Method for synthesizing copper nanowire gel by one-pot method
  • Method for synthesizing copper nanowire gel by one-pot method
  • Method for synthesizing copper nanowire gel by one-pot method

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Experimental program
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Embodiment

[0017] 1. Pretreatment of raw materials;

[0018] Accurately weigh 0.488g of copper nitrate dihydrate, 120g of sodium hydroxide, and 3g of ascorbic acid, and configure them into copper nitrate of 2mmol / L, 15mol / L of sodium hydroxide, and 17mmol / L of ascorbic acid, mix and stir evenly, and measure 3 ml of ethylenediamine, which was then added to the previous mixture, still stirring and eventually a blue suspension formed.

[0019] 2. making process;

[0020] After the blue suspension was stirred and reacted at 80°C for 38-45 minutes, the heating was stopped quickly and the reactor was placed in the air to cool naturally. After about 10 minutes, the red substance was precipitated and the copper nanowire wet gel was obtained.

[0021] 3. drying process;

[0022] The nanowire wet gel was left to age for 2 days to increase its copper nanowire toughness. After the aging is completed, filter and finally dry the copper nanowire wet gel at 80° C. for 5 hours in vacuum to obtain t...

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Abstract

The invention discloses a method for synthesizing copper nanowire gel by a one-pot method. For a long term, the research on a negative electrode of a traditional lithium battery industry mostly concentrates on a negative electrode material, but the research on a copper foil which is related to the negative electrode material and is used as a negative material current collector is quite scarce. The negative electrode copper foil of a traditional lithium battery only has one function of serving as the current collector, and is slightly inadequate in space of the battery and cost, therefore, the copper foil is enabled to have double functions by using the point, i.e., a new innovation of the copper foil for serving as the current collector and participating in lithium battery reaction like the negative electrode material is realized. The invention relates to a copper nanowire elementary substance; the copper nanowire elementary substance is prepared into the copper foil by using a sheet pressing machine, thus obtaining a negative electrode current collector of a lithium battery; by a performance test of the lithium battery, the material is found to remarkably enhance the capacity of the lithium battery; the first-time charge and discharge capacity reaches 1800mAhg<-1>; besides, the stability is more excellent; the copper foil has significant advantage in comprehensive performance compared with that of a commercial copper foil serving as the negative electrode current collector of the lithium battery.

Description

technical field [0001] The invention relates to a simple method for preparing negative electrode current collectors in lithium batteries, in particular to a method for synthesizing copper nanowire gel in one pot. Background technique [0002] Lithium-ion batteries, as the most cutting-edge rechargeable batteries, have attracted widespread attention from all over the world in the past ten years. Copper foil for lithium-ion batteries not only serves as the carrier of the negative electrode active material in the battery, but also serves as the collection and transmission of the negative electrode electron flow. Therefore, copper foil as a current collector has a great influence on the electrochemical performance of lithium batteries. At present, most lithium-ion battery manufacturers at home and abroad mostly use electrolytic copper foil to make electrode and negative electrode current collectors. Traditional lithium batteries have a lot of research on positive electrode mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/64H01M4/04H01M10/0525
CPCH01M4/04H01M4/64H01M10/0525H01M2004/023Y02E60/10
Inventor 温珍海黄鹏次素琴
Owner NANCHANG HANGKONG UNIVERSITY
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