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Sodium ion air battery

An air battery and sodium ion technology, applied in the field of electrochemistry, can solve the problems of reducing battery life, increasing battery safety hazards, and unsatisfactory cycle performance of batteries, achieving long cycle life and improving electrochemical performance.

Inactive Publication Date: 2018-07-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the large-scale application of traditional sodium-air batteries in electric vehicles still faces many challenges. The present invention is mainly dedicated to solving the dendrite and self-corrosion problems faced by the negative electrode of the battery
First of all, due to the self-corrosion problem of metal sodium in the organic electrolyte, the battery shows unsatisfactory cycle performance and reduces the service life of the battery.
At the same time, due to the formation of dendrites during the working process of the battery, the short circuit of the battery is caused, which seriously increases the safety hazard of the battery.

Method used

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Examples

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Embodiment 1

[0024] Such as figure 1 As shown, a new type of sodium-ion-air battery: from the negative electrode to the positive electrode, it includes biphenyl sodium liquid negative electrode, solid electrolyte, aqueous electrolyte, and air positive electrode; wherein, the concentration of sodium in the biphenyl sodium solution is 1 mol / L , the solid electrolyte is a NASICON solid electrolyte diaphragm with a thickness of 1 mm and a diameter of 16 mm, the aqueous electrolyte is a 1 mol / L NaOH aqueous solution, the air positive electrode is made of a catalytic layer and a conductive nickel mesh, and the catalytic layer is made of Pt / C The catalyst, activated carbon, and polytetrafluoroethylene are prepared by mixing and uniformly coating on carbon paper in a solvent of alcohol and water. The mass fraction of Pt in the Pt / C catalyst is 40%, and the Pt / C catalyst, activated carbon, and polytetrafluoroethylene The mass ratio of ethylene is 5:1:1;

[0025] The sodium-ion-air battery assemble...

Embodiment 2

[0027] Such as figure 1 As shown, a new type of sodium-ion-air battery: from the negative electrode to the positive electrode, it includes a biphenyl sodium liquid negative electrode, a solid electrolyte, an aqueous electrolyte, and an air positive electrode; wherein, the concentration of sodium in the biphenyl sodium solution is 5 mol / L ; The solid electrolyte is a NASICON solid electrolyte diaphragm with a thickness of 1 mm and a diameter of 16 mm. The aqueous electrolyte is a 1 mol / L NaOH aqueous solution. The air positive electrode is pressed by a catalytic layer and a conductive nickel mesh; the catalytic layer is made of Pt / C Catalyst, activated carbon, polytetrafluoroethylene are prepared by mixing uniformly in the solvent of alcohol and water and coating on carbon paper. The mass fraction of Pt in the Pt / C catalyst is 40%, and the Pt / C catalyst, activated carbon, polytetrafluoroethylene The mass ratio of ethylene is 5:5:2;

[0028] A new type of sodium-ion-air battery...

Embodiment 3

[0030] Such as figure 1 As shown, a new type of sodium-ion-air battery: from the negative electrode to the positive electrode, it includes a biphenyl sodium liquid negative electrode, a solid electrolyte, an aqueous electrolyte, and an air positive electrode; wherein, the concentration of sodium in the biphenyl sodium solution is 2 mol / L , the solid electrolyte is a NASICON solid electrolyte diaphragm with a thickness of 1 mm and a diameter of 16 mm, the aqueous electrolyte is a 1 mol / L NaOH aqueous solution, the air positive electrode is made of a catalytic layer and a conductive nickel mesh, and the catalytic layer is made of Pt / C The catalyst, activated carbon, and polytetrafluoroethylene are prepared by mixing and uniformly coating on carbon paper in a solvent of alcohol and water. The mass fraction of Pt in the Pt / C catalyst is 40%, and the Pt / C catalyst, activated carbon, and polytetrafluoroethylene The mass ratio of ethylene is 10:1:1; a new type of sodium-ion-air batte...

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Abstract

The invention discloses a sodium ion air battery, and belongs to the technical field of electrochemistry. The sodium ion air battery disclosed by the invention comprises a liquid cathode, solid electrolyte, aqueous electrolyte solution and an air anode; the liquid cathode is separated from the aqueous electrolyte solution by using the solid electrolyte; NaOH solution is used as the aqueous electrolyte solution; biphenyl sodium (Na-PB-DME) solution is used as the liquid cathode; the concentration of the sodium in biphenyl sodium solution is 1 to 5 mol / L, wherein the proportion of water in the biphenyl sodium solution is not greater than 6 mg / L. The battery disclosed by the invention has high discharge voltage, high specific discharge capacity and output power density; moreover, the sodium ion air battery disclosed by the invention has high stability and safety.

Description

technical field [0001] The invention relates to a sodium ion-air battery, which belongs to the technical field of electrochemistry. Background technique [0002] With the rapid development of the automobile industry, the energy crisis and air pollution have become major issues restricting the sustainable development of my country and the global economy. In order to improve the competitiveness of the automobile industry, ensure energy security and develop a low-carbon economy, the industrialization of new energy vehicles has become a According to the strategic consensus of the international automobile industry and the major strategic needs of my country's technological development, although the current power and energy storage systems of new energy vehicles are mainly lithium-ion batteries, due to the high initial purchase cost and long charging time (3-4 hours ), low specific energy density (150-200 Wh / kg), short cruising range of electric vehicles, few charging facilities, po...

Claims

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Application Information

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IPC IPC(8): H01M4/60H01M12/08
CPCH01M4/606H01M12/08H01M2220/20Y02E60/10
Inventor 梁风康瑶姚耀春马文会杨斌戴永年
Owner KUNMING UNIV OF SCI & TECH
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