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Secondary battery, application and preparation method of negative electrode of secondary battery

A secondary battery and negative electrode technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve problems such as side reactions, dendrite growth, large interface resistance, etc., achieve high safety, increase energy density, and long cycle life Effect

Active Publication Date: 2016-07-06
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By placing solid metal sodium or lithium or potassium in the conductive liquid metal negative electrode, the capacity of the conductive liquid metal negative electrode is greatly improved, thereby increasing the energy density of the battery, and it also solves the problem between the solid metal negative electrode and the solid electrolyte. Problems of large interface resistance, dendrite growth and side reactions

Method used

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  • Secondary battery, application and preparation method of negative electrode of secondary battery
  • Secondary battery, application and preparation method of negative electrode of secondary battery
  • Secondary battery, application and preparation method of negative electrode of secondary battery

Examples

Experimental program
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Effect test

Embodiment 1

[0051] This embodiment is used to illustrate the structure of the secondary battery provided by the present invention.

[0052] The secondary battery provided by the present invention includes solid metal sodium or lithium or potassium, conductive liquid metal, solid electrolyte, positive electrode material and battery case:

[0053] The solid metal sodium or lithium or potassium and the conductive liquid metal are housed in the solid electrolyte, or the solid metal sodium or lithium or potassium and the conductive liquid metal are filled in the battery case Between the solid electrolyte; the solid metal sodium or lithium or potassium together with the conductive liquid metal constitute the negative electrode of the secondary battery; this negative electrode design has a higher capacity than only using the conductive liquid metal as the negative electrode. The energy density of the battery is greatly improved; at the same time, placing the solid metal sodium in the conductive ...

Embodiment 2

[0067] This example is used to illustrate the structure of the cylindrical battery described in Example 1 above.

[0068] figure 1 Schematic diagram of the structure of a cylindrical battery. Such as figure 1 As shown, the cylindrical battery can include: solid metal sodium or lithium or potassium, conductive liquid metal, battery casing, positive electrode material and solid electrolyte tube;

[0069] The solid electrolyte tube is nested in the battery casing without contact, and the closed space between the inner wall of the battery casing and the outer wall of the solid electrolyte tube is used to accommodate the positive electrode material; The negative electrode material composed of the conductive liquid metal and solid metal sodium or lithium or potassium is accommodated.

[0070] When the secondary battery is discharged, the conductive liquid metal at the negative electrode loses electrons and is oxidized to biphenyl (Formula 1), and the electrons reach the positive ...

Embodiment 3

[0072] This embodiment is used to illustrate the structure of the dual flow battery described in Embodiment 1 above.

[0073] figure 2 Schematic diagram of the structure of the dual flow battery. Such as figure 2 As shown, the dual flow battery may include: solid metal sodium or lithium or potassium, conductive liquid metal, battery casing, positive electrode material, solid electrolyte tube, positive electrode liquid storage tank, negative electrode liquid storage tank and two pumps;

[0074] The solid electrolyte is used as a diaphragm to separate the battery casing into a closed positive electrode space and a negative electrode space, wherein the positive electrode space is connected to the positive electrode liquid storage tank, and the positive electrode liquid stored in the positive electrode liquid storage tank is pumped The positive electrode material is pumped into the positive electrode space; the negative electrode space is connected to the negative electrode li...

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PUM

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Abstract

The invention discloses a secondary battery, an application and a preparation method of a negative electrode of the secondary battery. The secondary battery comprises solid metal sodium or lithium or potassium, conductive liquid metal, a solid electrolyte, a positive electrode material and a battery shell, wherein the solid metal sodium or lithium or potassium and the conductive liquid metal are accommodated in a solid electrolyte tube formed by the solid electrolyte; or the part between the battery shell and the solid electrolyte is filled with the solid metal sodium or lithium or potassium and the conductive liquid metal; the solid metal sodium or lithium or potassium and the conductive liquid metal form a high-capacity negative electrode of the secondary battery; the part between the battery shell and the solid electrolyte is filled with the positive electrode material to form a positive electrode of the secondary battery; and the conductive liquid metal comprises a liquid generated by mixing any one or more of metal sodium, lithium and potassium and an aromatic compound and an ether solvent.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a secondary battery, its use and a preparation method for its negative electrode. Background technique [0002] With the depletion of traditional fossil energy and the increasingly prominent environmental problems, it is imminent to develop and utilize renewable energy such as solar energy and wind energy. However, due to the instability and intermittency of solar and wind energy, the power grid is unstable, so it is necessary to vigorously develop large-scale energy storage technology. Large-scale energy storage technology can effectively solve the problem of intermittent power supply from renewable energy sources such as solar energy and wind energy, realize demand management, eliminate peak and valley differences between day and night, and smooth loads. [0003] At present, the main large-scale energy storage technologies include pumped hydro storage, compressed air energy ...

Claims

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Application Information

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IPC IPC(8): H01M10/39H01M4/38H01M4/139
CPCY02E60/10
Inventor 胡勇胜余觉知李泓陈立泉黄学杰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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