A kind of anti-calcium mineral sodium ion solid electrolyte and its preparation method and application

A solid electrolyte and sodium ion technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problems of poor sodium ion conductivity, poor electrochemical compatibility, and inability to apply sodium ion all-solid-state batteries to achieve good electrochemical performance. Compatibility, meeting application requirements, and the effect of excellent thermodynamic stability

Active Publication Date: 2020-11-24
ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of sodium ion solid electrolyte of anti-calcium state mineral, thus solve the existing sodium ion solid electrolyte poor conductivity of sodium ion or poor electrochemical compatibility with metal sodium electrode, unable to fully solid state sodium ion Problems with battery applications

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  • A kind of anti-calcium mineral sodium ion solid electrolyte and its preparation method and application
  • A kind of anti-calcium mineral sodium ion solid electrolyte and its preparation method and application
  • A kind of anti-calcium mineral sodium ion solid electrolyte and its preparation method and application

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Embodiment 1

[0050] The anti-calcium mineral sodium ion solid electrolyte of the present embodiment has a chemical composition of Na 3 OCl, see structure figure 2 (c).

[0051] The preparation method of the anti-calcium mineral sodium ion solid electrolyte of the present embodiment comprises the following steps:

[0052] 1) Sodium oxide powder (Na 2 (2) and sodium chloride powder (NaCl) were dried in a vacuum oven for 24 hours, and under the protection of an argon atmosphere in a glove box, the sodium oxide powder and sodium chloride powder with a molar ratio of 1:1 were evenly mixed and loaded into a ball mill In the tank, add 15 zirconia grinding balls with a diameter of 10mm, and seal the ball milling tank.

[0053] Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 280rpm, keep the ball mill for 20 minutes every time, let it stand for cooling for 5 minutes, the total effective ...

Embodiment 2

[0056] The anti-calcium mineral sodium ion solid electrolyte of the present embodiment has a chemical composition of Na 3 o 1.25 Cl 0.5 .

[0057] The preparation method of the anti-calcium mineral sodium ion solid electrolyte of the present embodiment comprises the following steps:

[0058] 1) Sodium oxide powder (Na 2 (2) and sodium chloride powder (NaCl) were dried in a vacuum oven for 24 hours, and under the protection of an argon atmosphere in a glove box, the sodium oxide powder and sodium chloride powder with a mol ratio of 2.5:1 were uniformly mixed and loaded into a ball mill In the tank, add 15 zirconia grinding balls with a diameter of 10mm, and seal the ball milling tank.

[0059] Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 250rpm, keep the ball mill for 20 minutes every time, let it stand for cooling for 5 minutes, the total effective ball milling t...

Embodiment 3

[0062] The anti-calcium mineral sodium ion solid electrolyte of the present embodiment has a chemical composition of Na 3.125 o 1.125 Cl 0.875 .

[0063] The preparation method of the anti-calcium mineral sodium ion solid electrolyte of the present embodiment comprises the following steps:

[0064] 1) Sodium oxide powder (Na 2 (2) and sodium chloride powder (NaCl) were dried in a vacuum oven for 24 hours, and under the protection of an argon atmosphere in a glove box, the sodium oxide powder and sodium chloride powder with a molar ratio of 1.125:0.875 were uniformly mixed and loaded into a ball mill In the tank, add 15 zirconia grinding balls with a diameter of 10mm, and seal the ball milling tank.

[0065] Take the sealed ball mill tank out of the glove box, put it into the omnidirectional planetary ball mill for ball milling, set the speed of the ball mill to 350rpm, keep the ball mill for 20 minutes every time, let it stand for cooling for 5 minutes, the total effective...

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Abstract

The invention relates to a trans-calcium mineral sodium ion solid electrolyte as well as a preparation method and application thereof. The solid electrolyte has a chemical formula of Na3+aMpAyBzXmYn,wherein a is more than or equal to -0.05 and less than or equal to 0.45; M is plus divalent, plus trivalent or plus tetravalent metal element; p is more than or equal to 0 and less than or equal to 0.05; A is selected from minus divalent, minus trivalent or minus tetravalent metal elements, and y is more than 0; B is selected from minus divalent non-metallic elements, and z is more than or equal to 0; X and Y are respectively independently selected from halogens or minus monovalent groups, m is more than or equal to 0, and n is more than or equal to 0. Compared with the conventional Na11Sn2PS12 solid electrolyte (a one-dimensional sodium ion transport mode), the sodium ion battery solid electrolyte has three-dimensional equivalent super-fast ion transport ability, low diffusion activationenergy and high sodium ion conductivity, has excellent electrochemical compatibility with a metal Na electrode, and can well meet application requirements of sodium ion all-solid-state batteries.

Description

technical field [0001] The invention belongs to the field of sodium ion batteries, and in particular relates to an anti-calcium mineral sodium ion solid electrolyte and a preparation method and application thereof. Background technique [0002] The study of sodium-ion all-solid-state electrolytes to replace sodium-electrolyte liquid organic electrolytes is expected to fundamentally solve the safety hazards of flammability in liquid electrolyte batteries and the lack of lithium resources. However, with the ion conductance of the liquid electrolyte as the standard (sodium ion conductance greater than 1mScm -1 ), the rapid transport of Na ions in solid electrolytes is still extremely challenging. [0003] Traditional oxide solid electrolytes, such as sodium silicon phosphate Na 1+x Zr 2 Si x P 3-x o 12 (NZSP, 0≤x≤3) solid electrolyte with a maximum sodium ion conductivity of 0.1mScm at 298K -1 Na 3 V 2 (PO 4 ) 3 (NVP) has a sodium ion conductivity of 0.18mScm at 25°C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054H01M10/0565
CPCH01M10/054H01M10/0565Y02E60/10
Inventor 邵国胜王卓于玉然
Owner ZHENGZHOU NEW CENTURY MATERIALS GENOME INST CO LTD
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