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Wide-temperature-range high-performance electrochemical energy storage device based on bismuth-based electrode

An electrochemical and high-performance technology, applied in the field of electrochemical energy storage, can solve problems such as the inability to apply in wide temperature fields, and the inability of bismuth-based electrodes to apply potassium ion batteries, achieving excellent cycle stability, excellent electrochemical performance, and rate performance. super long effect

Active Publication Date: 2021-04-02
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention proposes a high-performance electrochemical energy storage device in a wide temperature range based on a bismuth-based electrode, which solves the problem that the current bismuth-based electrode cannot be applied to potassium ion batteries and cannot be applied in a wide temperature range

Method used

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  • Wide-temperature-range high-performance electrochemical energy storage device based on bismuth-based electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Weigh 0.1 g of bismuth trichloride powder, dissolve it in 50 ml of methanol, ultrasonic frequency is 30 KHZ, ultrasonic time is 60 minutes, with the help of magnetic stirring, the stirring time is 80 minutes to form S1;

[0043] (2) Weigh 0.08g of sodium borohydride powder, dissolve in methanol solution until complete reaction, the reaction time is 10 minutes, and form S2;

[0044] (3) Pour S1 into S2 under stirring at room temperature. After stirring for 30 minutes, the resulting product was washed with ethanol / methanol / deionized water for several times, and then dried in a vacuum oven at 80︒C for 8 hours. Bismuth material is prepared.

[0045] The phase composition analysis of the prepared bismuth raw materials was carried out by X-ray diffractometer produced by German Bruker company.

[0046] Such as figure 1 As shown, the results show that the peaks at specific positions of this sample correspond to the standard card (PDF-44-1246), respectively. It shows that...

Embodiment 2

[0060] (1) Weigh 0.2 g of bismuth bismuth nitrate pentahydrate powder, dissolve in 60 ml of ethanol, ultrasonic frequency is 10 KHZ, ultrasonic time is 10 minutes, with the help of magnetic stirring, stirring time is 10 minutes to form S1;

[0061] (2) Weigh 0.05g of potassium borohydride powder, dissolve in ethanol solution until complete reaction, the reaction time is 30 minutes, and form S2;

[0062] (3) Pour S1 into S2 under stirring at room temperature, continue stirring for 60 minutes, wash the obtained product with ethanol / methanol / deionized water several times, and then dry it in a vacuum oven at 30︒C for 3 hours. Bismuth material is prepared.

[0063] The manufacturing process of the bismuth electrode is as follows: the binder is dissolved in N-methylpyrrolidone, stirred for 2 h, then the bismuth raw material or carbon material and conductive agent are added to the binder solution, stirred for 6 h, and then coated on the copper foil or aluminum foil, and finally put ...

Embodiment 3

[0067] (1) Weigh 0.5 g of bismuth citrate powder, dissolve it in 70 ml of methanol, ultrasonic frequency is 40 KHZ, ultrasonic time is 200 minutes, with the help of magnetic stirring, the stirring time is 80 minutes to form S1;

[0068] (2) Weigh 0.15g of potassium borohydride powder, dissolve in methanol solution until complete reaction, the reaction time is 100 minutes, and form S2;

[0069] (3) Pour S1 into S2 under stirring at room temperature, continue stirring for 100 minutes, wash the obtained product with ethanol / methanol / deionized water several times, and then dry it in a vacuum oven at 100°C for 15 hours. Bismuth material is prepared.

[0070] The manufacturing process of the bismuth electrode is as follows: the binder is dissolved in N-methylpyrrolidone, stirred for 6 h, then the bismuth raw material or carbon material and conductive agent are added to the binder solution, stirred for 10 h, and then coated on the copper electrode. Foil or aluminum foil, and finally...

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Abstract

The invention provides a wide-temperature-range high-performance electrochemical energy storage device based on a bismuth-based electrode. The prepared bismuth electrode is used as a negative electrode material of a potassium ion battery and still shows excellent cycling stability, high reversible capacity and long cycle life under a low-temperature condition. Furthermore, by matching the preparedbismuth electrode with carbon, the bismuth-based potassium ion hybrid supercapacitor with high energy and power density can be obtained at normal / low temperature. The wide-temperature-range high-performance electrochemical energy storage device based on the bismuth-based electrode has excellent electrochemical performance, can simultaneously solve problems of low reversible capacity, short service life and high energy density and power density of a battery at normal / low temperature, is suitable for large-scale production, and has a wide application prospect. And the wide-temperature-range high-performance electrochemical energy storage device is a novel green chemical power supply with a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of electrochemical energy storage, in particular to a high-performance electrochemical energy storage device in a wide temperature range based on a bismuth-based electrode. Background technique [0002] With the rapid development of today's society, the shortage of traditional fossil fuels and their negative impact on the ecological environment have become increasingly prominent. Therefore, the development of sustainable and renewable new green energy storage devices has become a current research hotspot. The new regulations state that it is necessary to accurately grasp the development trend of the global energy structure, focus on the innovation and practical application of low-carbon and environmentally friendly technologies, greatly increase the proportion of new energy applications in the automotive industry, and ultimately build a new model of sustainable green development. Among them, the focus is on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/04H01G11/22H01M10/54H01M4/38
CPCH01G11/30H01G11/04H01G11/22H01M10/54H01M4/38Y02W30/84Y02E60/10Y02E60/13
Inventor 吴英鹏黄璐刘妙
Owner HUNAN UNIV
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