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All-solid-state battery and preparation method thereof

An all-solid-state battery and solid-state electrolyte technology, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of low ionic conductivity of electrolytes, low battery power, etc. performance, the effect of increasing power

Active Publication Date: 2016-04-06
复阳固态储能科技(溧阳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to propose an all-solid-state battery and its preparation method to solve the defects of low electrolyte ionic conductivity and low battery power of all-solid-state batteries in the prior art

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  • All-solid-state battery and preparation method thereof

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preparation example Construction

[0035]In addition, the preparation method of the above-mentioned all-solid-state battery proposed by the present invention includes:

[0036] Step 1: Mix the positive electrode powder material, acetylene black, graphite, imide, and solid electrolyte powder, and prepare the positive electrode sheet through coating, rolling, and drying;

[0037] Step 2: Thermally evaporate the mixture of carbon powder and lithium phosphate powder on the surface of the positive electrode under nitrogen plasma conditions to deposit a layer of lithium carbon phosphorus oxygen nitrogen solid electrolyte on the surface of the positive electrode, the lithium carbon phosphorus oxygen nitrogen solid electrolyte The chemical formula is Li x C y PO 4-z N z , where x>3,0<y<1,0<z<1; and

[0038] Step 3: Thermally evaporate a layer of metal lithium film on the surface of the lithium carbon phosphorus oxygen nitrogen solid electrolyte to form an all-solid lithium battery.

[0039] Wherein, the lithium ca...

Embodiment 1

[0051] Commercial cathode powder materials such as Li 4 Ti 5 o 12 , acetylene black, graphite, imide (PAI), solid electrolyte powder (Li 1.3 al 0.3 Ti 1.7 (PO 4 ) 3 Mix at a mass ratio of 50:3:2:5:40, use N-methylpyrrolidone (NMP) as a solvent, stir to form a uniform positive electrode slurry with a solid content of 50%, and coat the slurry on a 10 μm thick aluminum foil After being rolled and cut, it was dried in a vacuum oven at 120°C for 12 hours to obtain a 30 μm thick positive electrode sheet.

[0052] in Li 4 Ti 5 o 12 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. The deposition of lithium carbon phosphorus oxygen nitrogen solid electrolyte is a combination of thermal evaporation and nitrogen plasma technology, and the coating is deposited under vacuum conditions, and the vacuum degree can reach 10 -4 Pa, the working gas N is controlled by a mass flow controller 2 The flow r...

Embodiment 2

[0056] Commercial cathode powder materials such as LiFePO 4 , acetylene black, graphite, imide (PAI), solid electrolyte powder (Li 1.3 al 0.3 Ti 1.7 (PO 4 ) 3 Mix at a mass ratio of 50:3:2:5:40, use N-methylpyrrolidone (NMP) as a solvent, stir to form a uniform positive electrode slurry with a solid content of 50%, and coat the slurry on a 10 μm thick aluminum foil After being rolled and cut, it was dried in a vacuum oven at 120 °C for 12 h to obtain a 4 μm thick positive electrode sheet.

[0057] In LiFePO 4 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. in Li 4 Ti 5 o 12 A 2 micron thick lithium carbon phosphorus oxygen nitrogen solid electrolyte is deposited on the surface of the positive electrode. The deposition of lithium carbon phosphorus oxygen nitrogen solid electrolyte is a combination of thermal evaporation and nitrogen plasma technology, and the coating is deposited under...

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Abstract

The invention discloses an all-solid-state battery and a preparation method thereof. The all-solid-state battery comprises a positive plate, a Li<x>C<y>PO<4-z>N<z> solid electrolyte and a negative electrode, wherein the positive plate is prepared by coating, rolling and drying a positive electrode powder material, acetylene black, graphite, imide and solid electrolyte powder, the chemical formula of the Li<x>C<y>PO<4-z>N<z> solid electrolyte is Li<x>C<y>PO<4-z>N<z>, x is more than 3, y is more than 0 and less than 1, z is more than 0 and less than 1, and the negative electrode is metal lithium. The all-solid-state battery disclosed by the invention has favorable electrochemical performance and relatively high power, and can be taken as a lithium ion battery with high safety performance. The battery has high charging and discharging performance.

Description

technical field [0001] The invention relates to the technical field of advanced energy, in particular to a novel lithium battery. Background technique [0002] With the continuous improvement of energy demand and the continuous enhancement of social environmental protection awareness, the secondary chemical power supply system has developed rapidly and has a tendency to gradually replace the existing primary energy system. Lithium-ion batteries, in particular, are currently the chemical power sources with the highest specific energy, and have begun to be widely used in electronic products such as laptop computers and digital cameras. However, the current commercialized lithium ions basically use organic liquids as the electrolyte layer, which always has certain safety hazards. For example, the modern battery production industry cannot completely avoid problems such as explosion and combustion when the battery is short-circuited internally, and this safety hazard has the cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525H01M10/058
CPCH01M10/0525H01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 何整风傅正文
Owner 复阳固态储能科技(溧阳)有限公司
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