Porous carbon loaded europium oxide material as well as preparation method and application thereof

A technology of porous carbon and europium oxide, applied in electrical components, non-aqueous electrolyte storage batteries, circuits, etc., can solve the problems of complex production of positive electrode composite materials, high material production costs, and difficulty in industrial production

Active Publication Date: 2021-04-20
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]In the current work, the production of positive electrode composite materials in lithium-sulfur batteries is relatively complicated, and the production cost of materials is high, and it is difficult to realize industrial production

Method used

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  • Porous carbon loaded europium oxide material as well as preparation method and application thereof
  • Porous carbon loaded europium oxide material as well as preparation method and application thereof
  • Porous carbon loaded europium oxide material as well as preparation method and application thereof

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Embodiment 1

[0045]A porous carbon-supported europium oxide material. The main raw materials required for the experiment are porous carbon and europium nitrate, wherein the mass proportion of porous carbon (Ketjen black) is 60%, and the mass proportion of europium nitrate is 40%.

[0046] The above-mentioned porous carbon-supported europium oxide material can be obtained by the following steps:

[0047] (1) Weigh 200 mg of Ketjen Black into a glass beaker, add 80 ml of absolute ethanol and sonicate for 2 hours.

[0048] (2) Add 0.1mol / L Eu(NO 3 ) 3 Solution, the magnetic stirring time is 0.5h.

[0049] (3) Add concentrated ammonia water, adjust the pH value to 8.5, and magnetically stir for 1 h.

[0050] (3) The obtained solution is separated, washed, and dried to obtain a precursor.

[0051] (4) The obtained precursor was calcined at 900°C for 2 hours in a nitrogen atmosphere, and the heating rate was 5°C / min to obtain a composite material Eu 2 o 3 @KB.

[0052] The porous carbon-s...

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Abstract

The invention belongs to the field of new energy materials and devices, and discloses a porous carbon loaded europium oxide material as well as a preparation method and application thereof. Porous carbon and europium nitrate are mainly used as raw materials, a pH value control deposition method is adopted for preparation at room temperature, a carbon precursor can be obtained through ultrasonic treatment, stirring, suction filtration and drying, nitrogen is introduced into the precursor in a tubular furnace, calcination is performed at 700-1000 DEG C, and the porous carbon loaded europium oxide material can be obtained. The material can be used as a lithium-sulfur battery diaphragm modification material. Under the multiplying power of 0.05 C (1C = 1675mAh/g), the specific discharge capacity of the first circle can reach 1610mAh/g, and under the multiplying power of 1C, after 500 circles of circulation of a battery assembled by using the Ketjen black-loaded europium oxide material for the diaphragm modification layer, the capacity attenuation rate of each circle is only 0.05%, and compared with a blank diaphragm coated with Ketjen black and uncoated materials, the specific capacity is increased obviously and the excellent cyclic stability is realized.

Description

technical field [0001] The invention belongs to the field of new energy materials and devices, and in particular relates to a porous carbon-supported europium oxide material and its preparation method and application. Background technique [0002] With the increasing depletion of environmental pollution and fossil fuels, some sustainable and environment-friendly new energy devices have attracted intense attention. In portable energy storage devices, lithium-ion batteries are currently dominating the emerging market. This is because lithium-ion batteries have relatively higher theoretical specific capacity and energy density, longer cycle life, and more environmentally friendly secondary batteries than nickel-chromium batteries, lead-acid batteries, and silver-zinc batteries. The theoretical energy density of lithium-ion batteries is only 150Wh / kg, which still cannot meet the market demand for high energy density storage devices. [0003] Lithium-sulfur battery is one of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/431H01M50/449H01M50/489H01M10/052
CPCY02E60/10
Inventor 李爱菊彭林张明坤
Owner SOUTH CHINA NORMAL UNIVERSITY
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