Calcium ion battery positive electrode material and preparation method and application thereof

A positive electrode material, battery positive electrode technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems that are difficult to meet the needs of large-scale applications, low lithium content, high cost, etc., to improve the electromotive force of the battery and increase energy The effect of density and good cycle performance

Pending Publication Date: 2020-06-19
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high chemical activity of lithium, lithium-ion batteries generally use organic electrolytes and assemble batteries in an anhydrous and oxygen-free environment, which makes the cost higher
At the same time, the content of lithium on the earth is relatively small, and it is difficult to meet the needs of large-scale applications in the field of energy storage.

Method used

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  • Calcium ion battery positive electrode material and preparation method and application thereof
  • Calcium ion battery positive electrode material and preparation method and application thereof
  • Calcium ion battery positive electrode material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Prepare zinc ferricyanide, the steps are as follows:

[0061] (1) Weigh 0.5751g ZnSO 4 ·7H 2 O, add 100mL deionized water to configure 0.02mol / L ZnSO 4 aqueous solution;

[0062] (2) Weigh 0.6585g K 3 Fe(CN) 6 , add 100mL of deionized water to make a K of 0.02mol / L 3 Fe(CN) 6 aqueous solution;

[0063] (3) 100mL ZnSO 4 The aqueous solution was added to 100mL K at a rate of 100mL / h 3 Fe(CN) 6 In the aqueous solution, and maintain vigorous stirring (stirring speed is 500rpm), form a mixture;

[0064] (4) The mixture was kept under vigorous stirring (stirring speed was 500rpm) for 12 hours, and after standing for 6 hours, the product was obtained;

[0065] (5) Wash the reaction product with deionized water and ethanol, and dry it at 70°C for 12 hours to obtain zinc ferricyanide Zn 3 [Fe(CN) 6 ] 2 ·xH 2 O solid.

[0066] The above Zn by X-ray diffractometer 3 [Fe(CN) 6 ] 2 ·xH 2 O solids were analyzed to give Zn 3 [Fe(CN) 6 ] 2 ·xH 2 The XRD curve of...

Embodiment 2

[0075] Prepare zinc ferricyanide, the steps are as follows:

[0076] (1) Weigh 0.5751g ZnSO 4 ·7H 2 O, add 100mL deionized water to configure 0.02mol / L ZnSO 4 aqueous solution;

[0077] (2) Weigh 0.6585g K 3 Fe(CN) 6 , add 100mL of deionized water to make a K of 0.02mol / L 3 Fe(CN) 6 aqueous solution;

[0078] (3) 10mL ZnSO 4 The aqueous solution was added to 100mL K at a rate of 100mL / h 3 Fe(CN) 6 In the aqueous solution, and maintain vigorous stirring (stirring speed is 800rpm), form a mixture;

[0079] (4) The mixture was kept under vigorous stirring (stirring speed was 800rpm) for 12 hours, and after standing for 6 hours, the product was obtained;

[0080] (5) Wash the reaction product with deionized water and ethanol, and dry it at 70°C for 12 hours to obtain Zn 3 [Fe(CN) 6 ]·xH 2 O solid.

[0081] After detection by an X-ray diffractometer, the XRD spectrum of the zinc ferricyanide obtained in this example corresponds to each peak point of the standard spec...

Embodiment 3

[0089] Prepare zinc ferricyanide, the steps are as follows:

[0090] (1) Weigh 0.5751g ZnSO 4 ·7H 2 O, add 100mL deionized water to configure 0.02mol / L ZnSO 4 aqueous solution;

[0091] (2) Weigh 0.6585g K 3 Fe(CN) 6 , add 100mL of deionized water to make a K of 0.02mol / L 3 Fe(CN) 6 aqueous solution;

[0092] (3) 100mL ZnSO 4 The aqueous solution was added to 10mL K at a rate of 100mL / h 3 Fe(CN) 6 In the aqueous solution, and maintain vigorous stirring (stirring speed is 1000rpm), form a mixture;

[0093] (4) The mixture was kept under vigorous stirring (stirring speed was 1000rpm) for 12 hours, and after standing for 6 hours, the product was obtained;

[0094] (5) Wash the reaction product with deionized water and ethanol, and dry it at 70°C for 12 hours to obtain Zn 3 [Fe(CN) 6 ] 2 ·xH 2 O solid.

[0095] After detection by an X-ray diffractometer, the XRD spectrum of the zinc ferricyanide obtained in this example corresponds to each peak point of the standar...

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Abstract

The present invention relates to a calcium ion battery positive electrode material, a preparation method and applications thereof, the calcium ion battery positive electrode material comprises a positive electrode active material, a conductive agent and a binder, the positive electrode active material comprises zinc ferricyanide, and the zinc ferricyanide accounts for 60-92% by mass of the positive electrode material; preferably, the molecular formula of zinc ferricyanide is Zn<3>[Fe(CN)<6>]<2>.XH<2>O, and x is 0-10. The positive electrode active material disclosed by the invention can show arelatively high working potential, and the battery voltage can be improved, so that the energy density of the battery is improved; and meanwhile, the material is applied to the calcium ion battery andshows relatively good cycle performance.

Description

technical field [0001] The invention relates to the field of calcium-ion batteries, in particular to a cathode material for calcium-ion batteries and its preparation method and application. Background technique [0002] Among existing secondary batteries, lithium-ion batteries have high energy density and long service life, and have been widely used in the field of portable electronic devices. However, due to the high chemical activity of lithium, lithium-ion batteries generally use organic system electrolytes, and battery assembly is performed in an anhydrous and oxygen-free environment, which makes the cost higher. At the same time, the content of lithium on the earth is relatively small, and it is difficult to meet the needs of large-scale applications in the field of energy storage. [0003] The development of secondary batteries based on multivalent metal ions (such as Mg, Ca, Zn, etc.) can overcome the above shortcomings. For example, calcium ion batteries have higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/525H01M4/42H01M10/054
CPCH01M4/58H01M4/525H01M4/42H01M10/054Y02E60/10
Inventor 倪刚徐修文郝照
Owner HEFEI UNIV OF TECH
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