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Solid electrolyte membrane and lithium ion battery

A technology of solid-state electrolyte membrane and solid-state electrolyte, applied in secondary batteries, circuits, electrical components, etc., can solve problems affecting lithium ion conductivity, poor crystallinity, lithium ion diffusion blockage, etc.

Active Publication Date: 2015-06-03
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the LGPS solid electrolyte declared by Kanno group belongs to P4 2 / nmc space group crystal material, but the facts show that its crystallinity is not good. There are many defects in the synthesized LGPS crystal material, especially in the pipeline along the c-axis, which causes the diffusion of lithium ions to be blocked, and then seriously affects LGPS. Li-ion conductivity in solid-state electrolytes, so purely one-dimensional diffusion in LGPS materials is unscientific

Method used

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  • Solid electrolyte membrane and lithium ion battery
  • Solid electrolyte membrane and lithium ion battery
  • Solid electrolyte membrane and lithium ion battery

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Li 2 S, P 2 S 5 with GeS 2 According to the molar ratio of 5:1:1, it is placed in a high-energy ball milling device to be ball-milled until uniform, and the powder after ball-milling is obtained;

[0057] Then the ball-milled powder was placed in a quartz tube filled with argon, and treated at 600 °C for 8 h to obtain Li 10 GeP 2 S 12 Crystalline particles, followed by slow cooling to room temperature;

[0058] will get Li 10 GeP 2 S 12 The crystal particles and the binder silicone grease are kept at 200°C for 5 hours, and then placed on a vibrating table at a temperature of 200°C in a rectangular quartz tube (the bottom is sealed and the top is open, and the thickness of the rectangle is 0.05mm). , the vibrating table drives the quartz tube to vibrate 30,000 times at a frequency of 300 times / min, and compacts it into a diaphragm. After the completion, the quartz tube is broken and the diaphragm is taken out (thickness is 0.05mm); the measured Li 10 GeP 2 S ...

Embodiment 2

[0060] Li 2 S, P 2 S 5 with GeS 2 According to the molar ratio of 5:1:1, it is placed in a high-energy ball milling device to be ball-milled until uniform, and the powder after ball-milling is obtained;

[0061] Then the ball-milled powder was placed in a quartz tube filled with argon, and treated at 600 °C for 8 h to obtain Li 10 GeP 2 S 12 Crystalline particles, followed by slow cooling to room temperature;

[0062] will get Li 10 GeP 2 S 12 The crystal particles and the binder silicone grease are kept at 200°C for 4 hours, and then placed on a vibrating table at a temperature of 200°C in a rectangular quartz tube (the bottom is sealed and the top is open, and the thickness of the rectangle is 0.05mm). , the vibrating table drives the quartz tube to vibrate 30,000 times at a frequency of 300 times / min, and compacts it into a diaphragm. After the completion, the quartz tube is broken and the diaphragm is taken out (thickness is 0.05mm); the measured Li 10 GeP 2 S 12...

Embodiment 3

[0064] Li 2 S, P 2 S 5 with GeS 2 According to the molar ratio of 5:1:1, it is placed in a high-energy ball milling device to be ball-milled until uniform, and the powder after ball-milling is obtained;

[0065] Then the ball-milled powder was placed in a quartz tube filled with argon, and treated at 600 °C for 8 h to obtain Li 10 GeP 2 S 12 Crystalline particles, followed by slow cooling to room temperature;

[0066] will get Li 10 GeP 2 S 12 The crystal particles and the binder silicone grease are kept at 200°C for 2 hours, and then placed on a vibrating table at a temperature of 200°C in a rectangular quartz tube (the bottom is sealed and the top is open, and the thickness of the rectangle is 0.05mm). , the vibrating table drives the quartz tube to vibrate 30,000 times at a frequency of 300 times / min, and compacts it into a diaphragm. After the completion, the quartz tube is broken and the diaphragm is taken out (thickness is 0.05mm); the measured Li 10 GeP 2 S ...

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Abstract

The invention provides a solid electrolyte membrane and a lithium ion battery. The solid electrolyte membrane comprises solid electrolyte crystal particles and a binder, wherein a general formula of a solid electrolyte crystal is (LimZn)MP2X12, and the solid electrolyte crystal belongs to a triclinic system and a P1 space group; Z refers to high-valence metallic elements, the valence of the Z is larger than 1 and smaller than or equal to 3; the high-valence metallic elements Z comprise at least one of Mg, Al, Ca, Ti, Cu, Zn, In, Sr, Ru, Rh, Pd, Ag, Cd, Ba, Qs, Ir, Pt and Hg; M is at least one of Ge, Si, Sn, Al and P; X is at least one of O, S and Se; m is a rational number from 8 to 11; n is a rational number from 0-2; in the solid electrolyte membrane, a plane included angle Alpha1 of the crystal axis c axis direction of more than 80% of (LimZn)MP2X12 and the solid electrolyte membrane is larger than or equal to -15 degrees and is smaller than or equal to 15 degrees. The lithium ion battery comprises the above solid electrolyte membrane. Therefore, the conduction velocity of Lithium-ions can be effectively improved, and the rate capability and the cycle performance can be improved effectively.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a solid electrolyte membrane and a lithium ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long service life, high working voltage, stable discharge, no memory effect, and environmental protection. They have been widely used in portable electronic devices. Its working principle involves many fields such as physical chemistry, materials and energy. At present, the main problem of lithium-ion batteries is that the safety performance of the liquid electrolyte system used in high-power charging and discharging cannot be guaranteed when it is used on a large scale, especially in the application of hybrid or pure electric vehicles. The emergence of all-solid-state lithium-ion batteries may significantly improve their safety performance. Compared with traditional liquid organic electrolytes, solid-state electrolytes are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0562H01M10/0525
CPCY02E60/10
Inventor 黄世霖胡春华
Owner CONTEMPORARY AMPEREX TECH CO
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