Self-supporting composite film for liquid-phase zinc ion battery and preparation method thereof

A zinc-ion battery and composite film technology, applied in the field of electrochemistry, can solve the problems of reducing battery cycle and rate performance, reducing battery energy density, increasing electrode preparation cost, etc., and achieving improved structural stability, stable cycle performance, and good industrialization. The effect of applying potential

Inactive Publication Date: 2019-07-23
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the preparation of the positive electrode of the zinc ion battery in the above reports all adopts the traditional coating method, and the preparation process is lengthy.
On the other hand, the use of additives and current collectors in the electrode preparation process not only increases the cost of electrode preparation, but also reduces the energy density of the battery
In addition, non-conductive additives also limit the transport of electrons and ions in the electrodes, reducing the cycle and rate performance of the battery.

Method used

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  • Self-supporting composite film for liquid-phase zinc ion battery and preparation method thereof
  • Self-supporting composite film for liquid-phase zinc ion battery and preparation method thereof
  • Self-supporting composite film for liquid-phase zinc ion battery and preparation method thereof

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Embodiment 1

[0041] This embodiment provides a metal ion pre-embedded vanadium pentoxide nanobelt / carbon nanotube self-supporting composite film that can be directly used as the positive electrode of a zinc ion battery. Its preparation method comprises the following steps:

[0042] In the first step, at room temperature, add 0.182g of commercial vanadium pentoxide and 0.284g of sodium sulfate into 30mL of deionized water, sonicate in a water bath for 30min, stir magnetically for 30min, transfer to a hydrothermal kettle, keep at 180°C for 24h, and dissolve the product Washed three times with deionized water, and dried in vacuum at 80°C for 24 hours to obtain the metal ion pre-intercalated vanadyl precursor.

[0043] In the second step, 60 mg of the metal ion pre-embedded vanadyl precursor was added into the deionized aqueous solution, the cells were pulverized by ultrasound for 30 minutes, and magnetically stirred for 30 minutes. The resulting dispersion was dropped dropwise into 40 mg of ...

Embodiment 2

[0046] This embodiment provides a metal ion pre-embedded vanadium pentoxide nanobelt / carbon nanotube self-supporting composite film that can be directly used as the positive electrode of a zinc ion battery. Its preparation method comprises the following steps:

[0047] In the first step, at room temperature, add 0.182g of commercial vanadium pentoxide and 0.284g of sodium sulfate into 30mL of deionized water, sonicate in a water bath for 30min, stir magnetically for 30min, transfer to a hydrothermal kettle, keep at 180°C for 24h, and dissolve the product Wash with deionized water for several times, and vacuum-dry at 80°C for 24 hours to obtain a vanadium oxide precursor pre-intercalated with metal ions.

[0048] In the second step, 60 mg of the metal ion pre-embedded vanadyl precursor was added into the deionized aqueous solution, the cells were pulverized by ultrasound for 30 minutes, and magnetically stirred for 30 minutes. The resulting dispersion was dropped dropwise into...

Embodiment 3

[0051] This embodiment provides a metal ion pre-embedded vanadium pentoxide nanobelt / carbon nanotube self-supporting composite film that can be directly used as the positive electrode of a zinc ion battery. Its preparation method comprises the following steps:

[0052] In the first step, at room temperature, add 0.182g of commercial vanadium pentoxide and 0.284g of sodium sulfate into 30mL of deionized water, sonicate in a water bath for 30min, stir magnetically for 30min, transfer to a hydrothermal kettle, keep at 180°C for 24h, and dissolve the product Wash with deionized water for several times, and vacuum-dry at 80°C for 12 hours to obtain a vanadium oxide precursor pre-intercalated with metal ions.

[0053] In the second step, 60 mg of the metal ion pre-embedded vanadyl precursor was added into the deionized aqueous solution, the cells were pulverized by ultrasound for 30 minutes, and magnetically stirred for 30 minutes. The resulting dispersion was dropped dropwise into...

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Abstract

The invention belongs to the technical field of electrochemistry, and particularly relates to a self-supporting composite film for liquid-phase zinc ion battery and preparation method thereof, comprising the following steps: carrying out hydrothermal reaction on vanadium pentoxide and metal ion-containing salt to obtain a vanadium oxide precursor embedded with metal ions; carrying out hydrothermalself-assembly on the vanadium oxide precursor pre-embedded with the metal ions and the carbon nano tubes to form a metal ion pre-embedded layered vanadium pentoxide nanobelt / carbon nano tube compound; and carrying out vacuum filtration and freeze drying treatment on the metal ion pre-embedded layered vanadium pentoxide nanobelt / carbon nano tube composite to form the self-supporting composite film. The self-supporting composite film prepared by the invention can be used for a liquid-phase zinc ion battery, and has the advantages of large specific capacity, high coulombic efficiency, stable cycle performance and good rate capability; the raw materials of vanadium pentoxide and carbon nano tubes are commercial materials; and the synthesis process is simple, the yield is high, the repeatability is good, and the self-supporting composite film has good industrial application potential.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a self-supporting composite film for a liquid-phase zinc ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high power density, and long cycle life, and are widely used in portable electronic devices, smart grids, and power vehicles. In recent years, the large-scale commercial application of lithium-ion batteries has intensified the demand for lithium resources, but the limited and uneven distribution of lithium resources in the world has led to continuous rise in the price of lithium mines, which limits the development of lithium-ion batteries in large-scale energy storage applications . In addition, the organic electrolyte used in lithium-ion batteries is flammable and can easily cause safety accidents. Therefore, secondary batteries with low cost, high safety performance and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/583B82Y30/00
CPCB82Y30/00H01M4/366H01M4/48H01M4/583H01M10/36Y02E60/10
Inventor 杨利文刘雄许国保魏晓林
Owner XIANGTAN UNIV
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