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Anode material used for rechargeable aqueous solution zinc ion battery as well as preparation and application thereof

A technology for zinc-ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of lack of negative electrode materials for zinc-ion batteries, achieve good electrochemical cycle stability, simple preparation method, and wide source of raw materials Effect

Active Publication Date: 2019-05-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the shortage of negative electrode materials for the existing rechargeable aqueous zinc ion batteries, the object of the present invention is to provide a negative electrode material for rechargeable aqueous zinc ion batteries and its preparation method and application, wherein by using alkali metal or alkaline earth metal ions , or hydrogen ions, or copper ions on titanium disulfide (TiS 2 ) for modification treatment, thus a new type of anode material for rechargeable aqueous zinc-ion batteries can be obtained; the modified titanium disulfide material can be used as an anode material for aqueous zinc-based batteries to exert high capacity and long cycle performance

Method used

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  • Anode material used for rechargeable aqueous solution zinc ion battery as well as preparation and application thereof
  • Anode material used for rechargeable aqueous solution zinc ion battery as well as preparation and application thereof

Examples

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Embodiment 1

[0027] Weigh 1.0g of titanium disulfide powder, 0.2g of carbon black and 0.2g of PTFE, grind and mix in an agate mortar for 30 minutes, then roll it into a film with a pair of rollers, cut into discs with a diameter of 8mm, and press on Electrodes are made of titanium mesh. The obtained electrode is used as the positive electrode, the zinc sheet is used as the negative electrode, and 8mol / L NaClO 4 +0.2mol / L Zn(CF 3 SO 3 ) 2 The aqueous solution is used as the electrolyte and assembled into a button battery. With different current densities at 0.05-1.2V (vs.Zn 2+ / Zn) is disassembled after the potential interval is circulated once, and washed with deionized water to obtain a kind of sodium ion-modified titanium disulfide electrode material described in Example 1, i.e. Na x TiS 2 , where the x values ​​range from 0.11 to 0.14.

[0028] The value of x can be controlled by adjusting the charge and discharge current density. For example, when the charge and discharge curre...

Embodiment 2

[0031] Weigh 1.0g of titanium disulfide powder, 0.2g of carbon black and 0.2g of PTFE, grind and mix in an agate mortar for 30 minutes, then roll it into a film with a pair of rollers, cut into discs with a diameter of 8mm, and press on Electrodes are made of titanium mesh. The resulting electrode is used as a positive electrode, the zinc sheet is used as a negative electrode, and 8mol / L LiClO 4 +0.2mol / L Zn(CF 3 SO 3 ) 2 The aqueous solution is used as the electrolyte and assembled into a button battery. With different current densities at 0.05-1.2V (vs.Zn 2+ / Zn) after the potential interval cycle once, take it apart, wash with deionized water, obtain a kind of lithium ion-modified titanium disulfide electrode material described in the present embodiment 2, i.e. Li x TiS 2 , where the x values ​​range from 0.05 to 0.13.

[0032] The value of x can be controlled by adjusting the charge and discharge current density. For example, when the charge and discharge current d...

Embodiment 3

[0034] Weigh 1.0g of titanium disulfide powder, 0.2g of carbon black and 0.2g of PTFE, grind and mix in an agate mortar for 30 minutes, then roll it into a film with a pair of rollers, cut into discs with a diameter of 8mm, and press on Electrodes are made of titanium mesh. The obtained electrode is used as positive pole, and zinc sheet is used as negative pole, and 8mol / L KClO 4 +0.2mol / L Zn(CF 3 SO 3 ) 2 The aqueous solution is used as the electrolyte and assembled into a button battery. With different current densities at 0.05-1.2V (vs.Zn 2+ / Zn) is disassembled after the potential interval is circulated once, and washed with deionized water to obtain a titanium disulfide electrode material modified by potassium ions described in Example 3, i.e. K x TiS 2 , where the x values ​​range from 0.12 to 0.2.

[0035] The value of x can be controlled by adjusting the charge and discharge current density. For example, when the charge and discharge current density is 200mAg ...

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Abstract

The invention discloses an anode material used for a rechargeable aqueous solution zinc ion battery, characterized in that the anode material is titanium disulfide TiS2 modified by other elements, a chemical expression of the anode material is MxTiS2, wherein M is the other elements, the other elements are specifically at least one of hydrogen, copper, alkali metals and alkaline-earth metals, andx is doping content of the other elements and is not more than 0.4. The invention performs modification treatment on titanium disulfide (TiS2) by adopting alkali metal or alkaline-earth metal ions (orother metal ions), so that a novel rechargeable aqueous solution zinc ion battery anode material can be obtained; and the obtained modified titanium disulfide material can be taken as the anode material to be applied to a water-based zinc-based battery, and high capacity and long circulation performance are played.

Description

technical field [0001] The invention belongs to the field of aqueous zinc-based batteries, and more specifically relates to a negative electrode material for a rechargeable aqueous solution zinc-ion battery and a preparation method and application thereof. Background technique [0002] Rechargeable aqueous zinc-ion batteries have attracted much attention due to their high theoretical capacity, low cost, safety and environmental protection. At present, rechargeable aqueous zinc-ion batteries mainly use metal zinc (Zn) as the negative electrode material. However, during the long-term dissolution-deposition process, metal zinc not only changes in shape, but also easily forms dendrites, which can pierce the battery separator and cause battery damage. short circuit, thereby reducing the cycle life and energy density of the battery. Moreover, the deposition of zinc can lead to material loss due to easy loss of adhesion, reducing the utilization rate of materials. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/58H01M4/62H01M10/36
CPCY02E60/10
Inventor 蒋凯李威王康丽程时杰
Owner HUAZHONG UNIV OF SCI & TECH
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