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F<-> and Zn<2+> co-doped NASICON type solid lithium ion electrolyte

A solid electrolyte, lithium ion technology, applied in circuits, electrical components, secondary batteries, etc., can solve problems such as the conductivity of non-thin film lithium ion batteries to electrolytes that cannot be well met, reduce transmission bottlenecks, and improve conductivity. , to avoid the effect of structural distortion

Inactive Publication Date: 2012-05-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the room temperature lithium ion conductivity of these systems is usually in the range of 10 -4 S / cm-10 -6 Between S / cm, it still cannot meet the requirements of electrolyte conductivity for non-thin film lithium-ion batteries

Method used

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  • F&lt;-&gt; and Zn&lt;2+&gt; co-doped NASICON type solid lithium ion electrolyte
  • F&lt;-&gt; and Zn&lt;2+&gt; co-doped NASICON type solid lithium ion electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: ZnO: LiF: TiO 2 : NH 4 h 2 PO 4 : Li 2 CO 3Be 0.1: 0.1: 1.9: 3.0: 0.5 (molar ratio) ratio homogeneous mixing, add 3% 95% ethanol, in ball mill with the speed ball milling of 100 rev / mins 15 hours, after ball milling finishes, in 60 ℃ of vacuum ovens ( Dry in a vacuum degree of 20 Pa) for 3 hours, take it out and re-grind in an agate mortar for 30 minutes, and the ground powder is heated at a rate of 6°C / min to 700°C for 6 hours to make a solid electrolyte powder. The powder is mixed with 2wt% binder (PVC) and kept under a pressure of 250MPa for 2 minutes under a press to form a thin sheet, which is heated to 800°C at a rate of 10°C / min and kept for 10 hours under a nitrogen atmosphere to make lithium Ionic solid electrolyte sheets.

Embodiment 2

[0011] Example 2: ZnO: LiF: GeO 2 : NH 4 h 2 PO 4 : Li 2 CO 3 Be 0.3: 0.1: 1.7: 3.0: 0.7 (molar ratio) ratio homogeneous mixing, add 9% 95% ethanol, in ball mill with the speed ball milling of 450 rev / mins 45 hours, after ball milling finishes, in 80 ℃ of vacuum ovens ( Vacuum (95Pa) was dried for 9 hours, taken out and re-grinded in an agate mortar for 30 minutes, and the ground powder was heated to 950°C at a rate of 25°C / min and kept for 15 hours to make a solid electrolyte powder. The powder is mixed with 5wt% binder (PVC) and kept under a pressure of 450MPa for 6 minutes under a press to form a thin sheet, which is heated to 1000°C at a rate of 25°C / min and kept for 10 hours under a nitrogen atmosphere to make lithium Ionic solid electrolyte sheets.

Embodiment 3

[0012] Embodiment 3: ZnO: LiF: ZrO 2 : NH 4 h 2 PO 4 : Li 2 CO 3 Be 0.5: 0.2: 1.5: 3.0: 0.8 (molar ratio) ratio homogeneous mixing, add 5% 95% ethanol, ball mill with the rotating speed of 300 rev / mins in ball mill for 30 hours, after ball mill finishes, in 75 ℃ vacuum oven ( Dry in vacuum (50 Pa) for 6 hours, take it out and re-grind in an agate mortar for 20 minutes, and the ground powder is heated to 850°C at a rate of 10°C / min and kept for 12 hours to make a solid electrolyte powder. The powder is mixed with 2.6wt% binder (PVA) and kept under a pressure of 400 MPa under a press for 4 minutes to form a thin sheet. The thin sheet is heated to 900°C at a rate of 15°C / min and kept for 7 hours under a nitrogen atmosphere. Lithium ion solid electrolyte sheet.

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Abstract

The invention relates to an F<-> and Zn<2+> co-doped NASICON type solid lithium ion electrolyte. The electrolyte is characterized in that: the electrolyte has a stoichiometric formula of Li1+2x-yZnxM2-xP3O12-yFy, wherein x=0.1-0.5; y=0.1-0.2; and M is one of Ti, Ge, and Zr. According to the invention, materials are well mixed according to a molar ratio that ZnO:LiF:MO2(M=Ti, Ge, Zr):NH4H2PO4:Li2CO3=0.1-0.5:0.1-0.2:1.5-1.9:3.0:0.4-0.9; the mixture is ball-milled, compacted, and sintered, such that the electrolyte is obtained. With the electrolyte, a room temperature lithium ion conductivity is higher than 10<-4>S / cm.

Description

technical field [0001] The invention relates to the field of manufacturing a solid lithium ion electrolyte. Background technique [0002] Lithium-ion batteries have absolute advantages such as high volume, high weight-to-energy ratio, high voltage, low self-discharge rate, no memory effect, long cycle life, and high power density. They have an annual share of more than 30 billion US dollars in the global mobile power market and far exceed other The market share of batteries is the most promising chemical power source [Wu Yuping, Wan Chunrong, Jiang Changyin, Lithium-ion Secondary Batteries, Beijing: Chemical Industry Press, 2002.]. At present, most of the lithium-ion secondary batteries at home and abroad use liquid electrolytes. Liquid lithium-ion batteries have some disadvantages, such as: liquid organic electrolytes may leak, and may explode at too high a temperature, causing safety accidents, and cannot be used in some applications. Occasions with high safety requiremen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562
CPCY02E60/12Y02E60/10
Inventor 水淼舒杰任元龙徐丹郑卫东任政娟王青春黄峰涛
Owner NINGBO UNIV
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