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All-solid lithium-ion battery and manufacturing method thereof

A lithium-ion battery, all-solid-state technology, applied in the field of electrochemistry, can solve problems such as explosion, leakage, and hindered development of commercial power lithium batteries.

Active Publication Date: 2013-08-14
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, liquid electrolytes are widely used in commercial lithium-ion batteries on the market. It is a flammable and explosive organic substance, which has potential safety hazards such as leakage and explosion when the temperature is too high, which will cause greater personal injury and economic losses.
At the same time, for some extreme environments, such as highly integrated small electronic products and high-energy, stable energy storage power stations, etc., the existing lithium-ion battery technology has been severely challenged
Lithium battery safety accidents occur frequently, and lithium battery electric vehicle fire accidents also hinder the development of commercial power lithium batteries

Method used

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  • All-solid lithium-ion battery and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1, making lithium manganate positive electrode all-solid-state lithium-ion battery

[0024] Lithium manganate is used as the positive electrode material, germanium-doped lithium lanthanum zirconate is used as the solid electrolyte, and lithium metal is used as the negative electrode material to assemble a solid lithium ion battery. First, germanium-doped lithium lanthanum zirconate was polished to smooth on 300#, 800# and 1500# sandpaper in sequence, ultrasonically treated in ethanol for 10 minutes, and dried at 70°C to obtain a solid electrolyte with a clean surface. Lithium manganese oxide, PVDF and Super P were evenly mixed in a ratio of 80:5:15, and coated on the surface of the solid electrolyte. Paste the metal lithium sheet on the other surface of the solid electrolyte. Finally, aluminum foil and copper foil were added as current collectors on the positive side and the negative side, respectively. The above structure is packaged in a stainless steel c...

Embodiment 2

[0026] Embodiment 2, making lithium cobalt oxide positive electrode all-solid-state lithium-ion battery

[0027]Lithium cobaltate is used as the positive electrode material, aluminum-doped lithium lanthanum zirconate is used as the solid electrolyte, and graphite is used as the negative electrode material to assemble a solid lithium-ion battery. First, aluminum-doped lithium lanthanum zirconate was polished to smoothness on 500#, 1000# and 2000# sandpaper in sequence, ultrasonically treated in ethanol for 12 minutes, and dried at 90°C to obtain a solid electrolyte with a clean surface. Lithium cobaltate, PVA and acetylene black were mixed evenly in a ratio of 90:5:5, and coated on the surface of the solid electrolyte. Mix graphite and PVA evenly in a ratio of 95:5, and coat it on the other surface of the solid electrolyte. Finally, aluminum foil and copper foil were added as current collectors on the positive side and the negative side, respectively. The above structure is p...

Embodiment 3

[0029] Embodiment 3, making nickel-cobalt-manganese ternary positive electrode all-solid-state lithium-ion battery

[0030] A solid lithium-ion battery is assembled using nickel-cobalt-manganese ternary material as the positive electrode material, germanium-doped lithium lanthanum zirconate as the solid electrolyte, and graphite as the negative electrode material. First, germanium-doped lithium lanthanum zirconate was polished to smooth on 400#, 800# and 1500# sandpaper in sequence, ultrasonically treated in ethanol for 15 minutes, and dried at 80°C to obtain a solid electrolyte with a clean surface. The nickel-cobalt-manganese ternary material, PVDF and Super P are uniformly mixed in a ratio of 85:5:10, and coated on the surface of the solid electrolyte. Graphite, conductive carbon black and PVDF are mixed uniformly according to the ratio of 90:5:5, and coated on the other surface of the solid electrolyte. Finally, aluminum foil and copper foil were added as current collecto...

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Abstract

The invention discloses an all-solid lithium-ion battery and a manufacturing method thereof. The all-solid lithium-ion battery comprises a positive pole material, a positive pole current collector, a solid electrolyte material, a negative pole material, a negative pole current collector and a stainless steel housing, wherein the solid electrolyte material is at least one selected from lanthanum lithium zirconate, strontium-doped lanthanum lithium zirconate, germanium-doped lanthanum lithium zirconate, aluminum-doped lanthanum lithium zirconate or silicon-doped lanthanum lithium zirconate. The manufacturing method of the battery is simple, and low in cost and energy consumption, and has a great application prospect in the future lithium-ion battery technology and market.

Description

technical field [0001] The invention relates to the field of electrochemistry, in particular to an all-solid lithium ion battery and a preparation method thereof. Background technique [0002] Since its commercialization in the early 1990s, lithium-ion batteries have gradually occupied a growing market in the fields of consumer electronics, such as mobile phones, notebook computers, and digital cameras, due to their high energy density and power density. large market share. With the continuous prosperity of the national economy and the continuous improvement of modern technology, lithium-ion batteries have greatly expanded their application fields in today's society. For example, electric vehicles have emerged in recent years to reduce carbon dioxide emissions, and thin-film batteries have been produced with the miniaturization and integration of electronic devices. The improvement and perfection of lithium-ion battery technology has expanded its application fields. At the...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/058
CPCY02E60/12Y02E60/10Y02P70/50
Inventor 南策文黄冕沈洋林元华
Owner TSINGHUA UNIV
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