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Flower-shaped bismuth sulfide potassium ion battery electrode material and preparation method thereof

A technology for battery electrodes and potassium ions, applied in battery electrodes, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems such as volume expansion of electrode materials and affect battery cycle performance, and simplify the manufacturing process , simple and easy solvothermal reaction process, and the effect of maintaining integrity

Inactive Publication Date: 2021-10-22
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the radius of potassium ions is much larger than that of lithium ions, which can easily lead to volume expansion of electrode materials during the cycle of potassium-ion batteries, thereby affecting the cycle performance and coulombic efficiency of the battery. research focus

Method used

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  • Flower-shaped bismuth sulfide potassium ion battery electrode material and preparation method thereof
  • Flower-shaped bismuth sulfide potassium ion battery electrode material and preparation method thereof
  • Flower-shaped bismuth sulfide potassium ion battery electrode material and preparation method thereof

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0026] A flower type bismuth sulfide potassium ion battery electrode material is characterized in that: comprises the steps:

[0027] (1) Step S1, the solution configuration process, includes the following steps, dissolving 1mmol of bismuth nitrate pentahydrate (Bi(NO3)3·5H2O) in 10mL of ethylene glycol ((CH2OH)2) and stirring it magnetically for 10min. It is solution A; add 0.5g of polyvinylpyrrolidone and 0.3g of thiourea to 60mL of ethylene glycol in sequence and stir magnetically until the polyvinylpyrrolidone and thiourea are completely dissolved, and this solution is designated as solution B.

[0028] (2) Step S2, solvothermal reaction, comprises the following steps:

[0029] Step S2.1, place the B solution i...

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Abstract

The invention discloses a flower-shaped bismuth sulfide potassium ion battery electrode material and a and preparation method thereof. The method comprises the following steps: dissolving bismuth nitrate, thiourea and polyvinylpyrrolidone in ethylene glycol, and carrying out solvothermal reaction to obtain a flower-shaped bismuth sulfide material. The preparation method is simple and efficient, and the prepared nano spherical antimony sulfide / carbon composite material is applied to a negative electrode of a potassium ion battery and shows excellent capacity and cycle performance.

Description

technical field [0001] The invention relates to a flower-shaped bismuth sulfide potassium ion battery electrode material and a preparation method of the potassium ion battery. Background technique [0002] At present, lithium-ion batteries have been widely used in portable electronic devices such as mobile phones and large-scale equipment such as electric vehicles, but the cost of lithium-ion batteries is relatively high due to the low abundance of lithium resources in the earth's crust. In recent years, potassium-ion batteries have attracted people's attention due to the high reserves and low cost of potassium resources in the earth's crust. However, the radius of potassium ions is much larger than that of lithium ions, which can easily lead to volume expansion of electrode materials during the cycle of potassium-ion batteries, thereby affecting the cycle performance and coulombic efficiency of the battery. research focus. Contents of the invention [0003] The object o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G29/00B82Y30/00H01M4/58H01M10/054
CPCC01G29/006H01M4/5815H01M10/054B82Y30/00H01M2004/021H01M2004/027C01P2004/03C01P2002/72C01P2004/30C01P2006/40Y02E60/10
Inventor 和锴铭吴明红雷勇付群
Owner SHANGHAI UNIV