A one-pot method for the synthesis of copper nanowire gels

A technology of copper nanowires and copper nitrate, applied in gel electrodes, active material electrodes, electrical components, etc., can solve the problems of single function of negative current collectors and less research on negative current collectors, and meet the requirements of easy industrial amplification and experimental equipment. Low, simple reaction conditions

Inactive Publication Date: 2019-03-01
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
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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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  • A one-pot method for the synthesis of copper nanowire gels
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  • A one-pot method for the synthesis of copper nanowire gels

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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 time, most of the research on the negative electrode of the traditional lithium battery industry has been concentrated on the negative electrode material, and related to the negative electrode material, copper as the current collector of the negative electrode material Foil research is quite scarce. Traditional lithium battery negative electrode copper foil only undertakes the function of current collector, which is slightly insufficient for the battery's own space and cost. Therefore, it is a new innovation to use copper foil to make it have a dual function, that is, it can not only assume the role of current collector, but also participate in the lithium battery reaction like the negative electrode material. The invention relates to a simple substance of copper nanowires, which is pressed into copper foil by a tablet press to make a negative electrode current collector of a lithium battery. It is found through lithium battery performance tests that the material can significantly enhance the capacity of the lithium battery, and it can be charged and discharged for the first time. The capacity has reached 1800mAhg ‑1 , and the stability is also excellent. The overall performance has obvious advantages over commercial copper foil used as lithium battery anode current collector.

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 Patents(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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