Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium borohydride-garnet type oxide composite solid electrolyte material, and preparation method and application thereof

A solid electrolyte, garnet-type technology, used in composite electrolytes, solid electrolytes, non-aqueous electrolytes, etc., can solve chemical stability, electrochemical stability has not been studied, poor contact between solid electrolyte and electrode interface, interface resistance Advanced problems, to achieve the effect of improving electrochemical stability and chemical stability, good application prospects, and excellent performance

Pending Publication Date: 2021-07-09
无锡新锂耀辉能源科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor contact between the solid electrolyte and the electrode interface, high interface resistance, surface oxidation and acidification restrict its development.
CN111584931A discloses lithium borohydride and sulfide composite system solid electrolyte and its preparation method and application. The composite solid electrolyte is obtained by high-energy ball milling of sulfide and lithium borohydride, and the good contact and low interface between lithium borohydride and metal lithium negative electrode are used Resistance solves the problem of poor interface contact between sulfide and lithium metal, making it have excellent electrode compatibility, but there is no research on chemical stability and electrochemical stability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium borohydride-garnet type oxide composite solid electrolyte material, and preparation method and application thereof
  • Lithium borohydride-garnet type oxide composite solid electrolyte material, and preparation method and application thereof
  • Lithium borohydride-garnet type oxide composite solid electrolyte material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A LiBH 4 - Preparation of LLZTO composite solid electrolyte material:

[0032] Step 1: In the isolation of air (H 2 O2 4 with Li 7 La 3 Zr 1 al 2 o 12 Mix according to the mass ratio of 1:1, under the protection of high-purity (99.9999%) inert gas (argon), use a planetary wheel ball mill for high-energy ball milling treatment, set the ball-to-material ratio to 40:1, and the speed to 450 rpm. The time is 5 h, and the mixed powder is obtained.

[0033] Step 2: Put the mixed powder obtained in Step 1 into the sample cell of a Sievert-type gas-solid reaction airtight device, perform heating, melting and impregnation treatment under a 5MPa high-pressure hydrogen atmosphere, and heat it to 350 °C at a heating rate of 5 °C / min for high-temperature melting Immersion treatment for 12 h to melt LiBH 4 Full contact with LLZTO interface.

[0034] Step 3: Cool to 120°C temperature zone, and keep warm for 4 hours to fully refine the grains. Cool to room temperature at a ra...

Embodiment 2

[0036] A LiBH 4 - Preparation of LLZTO composite solid electrolyte material:

[0037] Step 1: In the isolation of air (H 2 O2 4 with Li 7 La 3 Zr 1 Ta 2 o 12Mix according to the mass ratio of 1:5, under the protection of high-purity (99.9999%) inert gas (argon), use a planetary wheel ball mill for high-energy ball milling, set the ball-to-material ratio to 30:1, and the speed to 400 rpm. The time is 3 h, and the mixed powder is obtained.

[0038] Step 2: Put the mixed powder obtained in Step 1 into the sample cell of a Sievert-type gas-solid reaction airtight device, perform heating, melting and impregnation treatment under a 1MPa high-pressure hydrogen atmosphere, and heat it to 300 °C at a heating rate of 5 °C / min for high-temperature melting Immersion treatment for 10 h to melt LiBH 4 Full contact with LLZTO interface.

[0039] Step 3: Cool to a temperature zone of 110°C, and keep warm for 4 hours to fully refine the crystal grains. Cool to room temperature at a r...

Embodiment 3

[0041] A LiBH 4 - Preparation of LLZTO composite solid electrolyte material:

[0042] Step 1: In the isolation of air (H 2 O2 4 with Li 7 La 3 Zr 1 Nb 2 o 12 Mix according to the mass ratio of 5:1, under the protection of high-purity (99.9999%) inert gas (argon), use a planetary wheel ball mill for high-energy ball milling treatment, set the ball-to-material ratio to 50:1, and rotate at 500 rpm. The time is 8 h, and the mixed powder is obtained.

[0043] Step 2: Put the mixed powder obtained in Step 1 into the sample cell of a Sievert-type gas-solid reaction closed device, perform heating, melting and impregnation treatment under a 10MPa high-pressure hydrogen atmosphere, and heat it to 400 °C at a heating rate of 5 °C / min for high-temperature melting Immersion treatment for 15 h to melt LiBH 4 Full contact with LLZTO interface.

[0044] Step 3: Cool to a temperature zone of 150°C, and keep warm for 4 hours to fully refine the crystal grains. Cool to room temperature...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Impedanceaaaaaaaaaa
Conductivityaaaaaaaaaa
Energy densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium borohydride-garnet type oxide composite solid electrolyte material, and a preparation method and application thereof. The lithium borohydride-garnet type oxide composite solid electrolyte material is a compound of lithium borohydride and garnet type oxide, and the ratio of the lithium borohydride to the garnet type oxide is 1: 5 to 5: 1 (w / w). The crystal grains of the lithium borohydride are nanocrystals. The composite solid electrolyte material is prepared through the steps of ball-milling and uniform mixing, heating, melting and dipping, cooling and heat preservation, and quenching cooling, and is applied to all-solid-state lithium batteries. Lithium borohydride is introduced into garnet type oxide to form a composite solid electrolyte material, and lithium borohydride grains are refined through the steps of heating, melting, dipping, cooling, heat preservation and refining, so that the wettability of a metal lithium negative electrode to the obtained composite solid electrolyte is enhanced, a close-contact compact interface is formed, and the interface resistance is very low; and the power density and the long cycle stability of the all-solid-state lithium battery can be improved.

Description

technical field [0001] The invention belongs to the technical field of solid electrolyte materials, and in particular relates to a lithium borohydride-garnet type oxide composite solid electrolyte material and a preparation method and application thereof. Background technique [0002] Most existing commercial lithium-ion batteries use organic electrolytes. organic electrolytes with up to 10 -2 S cm -1 The high lithium ion conductivity provides favorable conditions for lithium ion batteries to achieve high rate performance. However, organic electrolytes are prone to leakage during use, and can only provide limited energy density and power density, which cannot fully meet the energy needs of new energy vehicles. [0003] Using a solid electrolyte instead of an organic electrolyte to assemble a lithium metal battery can not only avoid the formation of an unstable SEI film in the organic electrolyte on the metal lithium anode, prevent capacity decay and decrease in Coulombic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H01M10/0562H01M10/052
CPCH01M10/0562H01M10/052H01M2300/0068H01M2300/0088Y02E60/10
Inventor 张耀吴子强张辉
Owner 无锡新锂耀辉能源科技有限公司