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Cu2-xSe nanomaterial used as lithium ion battery electrode material, and preparation method thereof

A lithium-ion battery, cu2-xse technology, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve the problems of low theoretical capacity and high manufacturing cost of lithium-ion batteries, and achieve high structural purity , dense distribution, the effect of improving conductivity and specific capacity

Inactive Publication Date: 2018-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, lithium-ion batteries with high energy, high power density, long cycle life and low manufacturing cost are becoming more and more expensive, and traditional graphite-based materials can no longer meet people's urgent requirements for high energy density and large-scale energy storage. , because of its low theoretical capacity

Method used

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  • Cu2-xSe nanomaterial used as lithium ion battery electrode material, and preparation method thereof
  • Cu2-xSe nanomaterial used as lithium ion battery electrode material, and preparation method thereof
  • Cu2-xSe nanomaterial used as lithium ion battery electrode material, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Add 1mmol copper chloride dihydrate, 1mmol SeO 2 , 2ml hydrazine hydrate as reducing agent.

[0037] (2) After 10 minutes of ultrasonic stirring, the reaction kettle was sealed in a stainless steel autoclave, and the hydrothermal reaction was carried out at 160°C for 8 hours.

[0038] (3) Naturally cool to room temperature, the product is washed with water and ethanol, collected by filtration, and dried at 80°C for 4 hours to obtain the target product.

Embodiment 2

[0040] (1) Add 1mmol copper chloride dihydrate, 1mmol SeO 2 , 2ml hydrazine hydrate as reducing agent.

[0041] (2) After 10 minutes of ultrasonic stirring, the reaction kettle was sealed in a stainless steel autoclave, and the hydrothermal reaction was carried out at 160°C for 12 hours.

[0042] (3) Naturally cool to room temperature, the product is washed with water and ethanol, collected by filtration, and dried at 80°C for 4 hours to obtain the target product.

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Abstract

The invention discloses a Cu2-xSe nanomaterial used as a lithium ion battery electrode material, and a preparation method thereof. The nanomaterial is a sheet nanostructure. The Cu2-xSe nanomaterial is synthesized in a one-step hydrothermal synthesis manner with SeO2 as a selenium source and CuCl2.2H2O as a copper source. The prepared Cu2-xSe nanomaterial has the characteristics of high structuralimpurity, uniform morphology and uneven granularity size. The Cu2-xSe nanomaterial is used as the electrode material to assembly a lithium ion battery, and results of electrochemical performance testshow that the initial specific capacity can reach 345.75 mAh / g and is very close to a theoretic value of 376 mAh / g, and the charge transfer impedance is 1.32 omega / cm<2>. The copper selenide nanoelectrode material has the characteristics of high specific capacitance, low impedance, simple preparation method and low cost.

Description

technical field [0001] The invention relates to lithium ion battery electrode materials, in particular to the field of electrode materials of nanostructured selenide lithium ion batteries. Background technique [0002] In recent years, with the introduction of energy-saving measures against global warming, new energy systems such as secondary batteries, fuel cells, and supercapacitors are expected to be used to reduce carbon dioxide emissions. In particular, the transportation sector accounts for 24% of energy consumption and 20% of CO2 emissions, and lead and NiMH batteries have been used in hybrid electric vehicles (Hev) and electric vehicles (EV). Among secondary batteries, lithium-ion batteries have the highest energy and power density and are the lightest among secondary batteries. Therefore, lithium-ion batteries are suitable as power sources for vehicles such as electric vehicles and passenger cars. Using secondary batteries on railways can Improve energy saving effe...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/581H01M10/0525Y02E60/10
Inventor 吕建国张田吴宇浩刘光
Owner ZHEJIANG UNIV
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