1.5V chargeable lithium battery and preparation method thereof

A technology for rechargeable lithium batteries and battery cells, applied in lithium batteries, non-aqueous electrolyte batteries, secondary batteries, etc., can solve problems such as uneven current density at the SEI interface, battery safety issues, etc., and achieve good thermal stability and Anti-puncture strength, save production cost, and improve the effect of lithium ion conductivity

Active Publication Date: 2013-05-22
BEIJING HAWAGA POWER STORAGE TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when metal lithium is used as a negative electrode, it is very easy to react with the electrolyte to form a solid electrolyte interface (SEI) layer. Due to the uneven current density at the SEI interface during charging, it is easy to cause the formation of

Method used

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  • 1.5V chargeable lithium battery and preparation method thereof
  • 1.5V chargeable lithium battery and preparation method thereof
  • 1.5V chargeable lithium battery and preparation method thereof

Examples

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Example Embodiment

[0037] Example one:

[0038] This example illustrates the preparation of an 18650 rechargeable lithium ion battery with a voltage of 1.5V provided by the present invention.

[0039] (1) Preparation of lithium titanate cathode

[0040] Dissolve 3 g of polyvinylidene fluoride (PVDF) in 120 mL of N-methylpyrrolidone (NMP), then add 24 g of lithium titanate powder and 3 g of carbon black to it, and then stir in vacuum for 6 hours to form a uniform positive electrode slurry. Coat or spray the slurry on one side of the aluminum foil with a thickness of 16μm and a width of 60mm (which should be cleaned and welded with tabs), dried at 120℃, and then coated on the slurry The other side of the aluminum foil is rolled to obtain a lithium titanate positive electrode with a thickness of 116 μm. The surface density of the lithium titanate active material is 15 mg / cm. 2 .

[0041] (2) Preparation of composite layer of lithium titanate cathode and lithium fast ion conductor separator

[0042] Dissolv...

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Abstract

The invention discloses a 1.5V chargeable lithium battery and a preparation method thereof, and belongs to the technical field of a chemical energy storage battery. The 1.5V chargeable lithium battery comprises a positive electrode, an inorganic composite diaphragm and a negative electrode, and is characterized in that the inorganic composite diaphragm consists of inorganic material power containing lithium fast ion conductor powder and a bonder, the internal short-circuit when the battery is internally repeatedly charged and discharged can be prevented, and the safety of the battery is improved; and the inorganic composite diaphragm is in-situ prepared on a positive active layer, so that the interface adhesion is good, the interface resistance is also reduced, and the preparation process of the battery is simplified.

Description

Technical field [0001] The invention relates to a low-voltage rechargeable battery, in particular to a 1.5V rechargeable lithium battery. Background technique [0002] With the rapid development of electrical, electronic, communications, and computer industries, the demand for highly stable rechargeable batteries is increasing. 1.5V low-voltage battery is a widely used battery, currently there are two series on the market: one series is silver-zinc battery, which is characterized by high specific energy, but the disadvantage is that it is expensive and has a short service life; the other series is Zinc-manganese battery, although the price of this battery is relatively cheap, but it has low capacity and high self-discharge rate. [0003] Lithium batteries have attracted much attention due to their high specific capacity, good cycle performance, and low self-discharge rate. As an electrode material, lithium titanate has a lithium intercalation potential of 1.5V (vs. Li + / Li), the...

Claims

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Application Information

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IPC IPC(8): H01M10/052H01M10/0525H01M2/16H01M10/0587
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 陈永翀康利斌李琪韩立张萍王秋平
Owner BEIJING HAWAGA POWER STORAGE TECH
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