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Preparation method of lithiophilicity negative electrode, lithium-lithium negative electrode and lithium battery

A lithium-philic lithium battery technology, applied in the field of preparation of lithium-philic negative electrodes, can solve the problems of complex preparation process and high equipment requirements for lithium-philic substrates

Active Publication Date: 2019-10-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the preparation process of most lithium-philic substrates is complex and requires high equipment requirements, and most of them cannot be realized at room temperature.

Method used

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  • Preparation method of lithiophilicity negative electrode, lithium-lithium negative electrode and lithium battery
  • Preparation method of lithiophilicity negative electrode, lithium-lithium negative electrode and lithium battery
  • Preparation method of lithiophilicity negative electrode, lithium-lithium negative electrode and lithium battery

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Embodiment 1

[0039] On the one hand, this embodiment provides a method for preparing a lithium-philic negative electrode, comprising the following steps:

[0040] (1) AgNO 3 Dissolved in an organic solvent mixture containing N-methylpyrrolidone (NMP) to make AgNO 3 solution, the organic solvent also includes 1,3-dioxolane (DOL) and ethylene glycol dimethyl ether (DME); wherein 1,3-dioxolane (DOL) / ethylene glycol dimethyl ether ( DME) volume ratio is 1:1, N-methylpyrrolidone (NMP) volume fraction is 20%, AgNO 3 The concentration of the solution is 0.01mol / L;

[0041] (2) Preparation of Lithophilic negative electrode: the above AgNO 3 Add 150 μL of the solution dropwise to the surface of the lithium sheet, and react to generate Ag and LiNO 3 , the Ag is covered on the surface of the lithium sheet to form a lithium-philic Ag / Li composite electrode, and the solvent is evaporated, and the LiNO 3 deposited on the surface of the composite electrode to obtain the lithium-philic negative elect...

Embodiment 2

[0052] On the one hand, this embodiment provides a method for preparing a lithium-philic negative electrode, comprising the following steps:

[0053] (1) AgNO 3 Dissolved in an organic solvent mixture containing N-methylpyrrolidone (NMP) to make AgNO 3 Solution, the organic solvent also includes ethylene carbonate (EC), the N-methylpyrrolidone (NMP) volume fraction is 40%, wherein AgNO 3 The concentration of the solution is 1mol / L;

[0054] (2) Preparation of Lithophilic negative electrode: the above AgNO 3 Add 50 μL of the solution dropwise to the surface of the lithium sheet, and react to form Ag / Li alloy and LiNO 3 , the Ag / Li alloy is covered on the surface of the lithium sheet to form a lithium-friendly Ag / Li composite electrode, and the solvent is evaporated, and the LiNO 3 deposited on the surface of the composite electrode to obtain the lithium-philic negative electrode.

[0055] On the other hand, this embodiment also provides a lithium-philic negative electrode,...

Embodiment 3

[0063] On the one hand, this embodiment provides a method for preparing a lithium-philic negative electrode, comprising the following steps:

[0064] (1) AgNO 3 Dissolved in an organic solvent mixture containing N-methylpyrrolidone (NMP) to make AgNO 3 solution, the organic solvent also includes dimethyl carbonate (DMC), and the volume fraction of N-methylpyrrolidone (NMP) is 5%, wherein AgNO 3 The concentration of the solution is 0.05mol / L;

[0065] (2) Preparation of lithium-philic negative electrode: take the above AgNO 3 Add 100 μL of the solution dropwise to the surface of the lithium sheet, and react to generate Ag and LiNO 3 , the Ag is covered on the surface of the lithium sheet to form a lithium-philic Ag / Li composite electrode, and the solvent is evaporated, and the LiNO 3 deposited on the surface of the composite electrode to obtain the lithium-philic negative electrode.

[0066] On the other hand, this embodiment also provides a lithium-philic negative electro...

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Abstract

The invention provides a preparation method of a lithiophilicity negative electrode, the lithiophilicity negative electrode and a lithium battery. The method comprises the steps of (1) dissolving MXNO3 in an organic solvent mixed liquor to prepare a MxNO3 solution, wherein M is a metal with a lower metal activity than Li, and (2) preparing the lithiophilicity negative electrode, lithiophilicity including the steps of dropwise adding the above MxNO3 solution to a surface of a lithium sheet, reacting to form an M or M / Li alloy to obtain a lithiophilicity M / Li composite electrode, and evaporatingthe solvent, wherein LiNO3 is deposited on the surface of the composite electrode. The purpose is to optimize a preparation method of a lithiophilicity matrix, the lithiophilicity negative electrodecan be obtained by using the method, at LiNO3 can be obtained at the same time. The lithiophilicity negative electrode can adjust a lithium nucleus, overpotential is reduced, moreover, the lithium iondistribution can be homogenized, and the uniform lithium deposition is achieved.

Description

technical field [0001] The invention relates to the field of metallurgical physical chemistry, in particular to a preparation method and application of a lithium-philic negative electrode. Background technique [0002] With the continuous development of electric vehicles and portable devices, the demand for high energy density battery systems is increasing. Due to the low capacity and energy density of traditional lithium-ion batteries, they cannot meet the needs of high-energy-density energy storage devices. On the other hand, metallic lithium has a very high theoretical specific capacity (3860mAh / g) and the lowest redox potential (-3.04V vs SHE). Especially in terms of providing power for electric vehicles, lithium metal batteries show obvious advantages in endurance. The theoretical energy density of metal lithium matching with transition metal oxides can reach 440Wh / Kg, and matching with elemental sulfur can reach 650Wh / Kg, which has obvious advantages over the energy ...

Claims

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Application Information

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IPC IPC(8): H01M4/1395H01M4/36H01M4/38H01M4/62H01M10/0525H01M4/134
CPCH01M4/134H01M4/1395H01M4/366H01M4/382H01M4/628H01M10/0525H01M2004/027Y02E60/10
Inventor 王接喜柳天成胡启阳李新海谭磊颜果春王志兴郭华军彭文杰
Owner CENT SOUTH UNIV