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Lithium borohydride/decaborane solid electrolyte and preparation method thereof

A solid electrolyte, lithium borohydride technology, applied in solid electrolyte, electrolyte battery manufacturing, electrolyte and other directions, can solve the problems of complex preparation process and insignificant improvement, and achieve a simple preparation method, excellent transmission characteristics, and excellent electrochemical performance. Effect

Active Publication Date: 2021-03-09
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LiBH prepared by this method 4 The ionic conductivity of the base solid electrolyte is higher than that of pure LiBH 4 Compared with the improvement is not obvious, and the preparation process is more complicated

Method used

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  • Lithium borohydride/decaborane solid electrolyte and preparation method thereof
  • Lithium borohydride/decaborane solid electrolyte and preparation method thereof
  • Lithium borohydride/decaborane solid electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of 20wt% lithium borohydride / decaborane comprises the following steps:

[0039] At room temperature, in an argon glove box, weigh 100 mg of lithium borohydride powder and 400 m of decaborane powder, put them into agate and grind them evenly, and put the uniformly mixed product into a ball mill tank for high-energy hydrogen-filled ball milling Carry out the ball milling process: the ball-to-material ratio is 40:1, the ball milling speed is 300rpm, the ball milling time is 5h, and the hydrogen charging pressure is 4Mpa. The uniform mixture after ball milling is placed in a high temperature and high pressure sintering resistance furnace for heating and heat preservation. Process parameters: 0.2Mpa argon protection, temperature rise 5°C / min, target temperature and holding temperature 200°C, holding time 15h, cooling with the furnace. The product after cooling is 20 wt% lithium borohydride / decaborane. The schematic diagram of the solid electrolyte preparatio...

Embodiment 2

[0043] The preparation of 30wt% lithium borohydride / decaborane comprises the following steps:

[0044] At room temperature, in an argon glove box, weigh 150 mg of lithium borohydride powder and 350 m of decaborane powder, put them into agate and grind them evenly, and put the uniformly mixed product into a ball mill tank for high-energy hydrogen-filled ball milling Carry out the ball milling process: the ball-to-material ratio is 40:1, the ball milling speed is 300rpm, the ball milling time is 2h, and the hydrogen charging pressure is 4Mpa. The uniform mixture after ball milling is placed in a high temperature and high pressure sintering resistance furnace for heating and heat preservation. Process parameters: 0.2Mpa argon protection, temperature rise 5°C / min, target temperature and holding temperature 200°C, holding time 15h, cooling with the furnace. The product after cooling is 30 wt% lithium borohydride / decaborane. The schematic diagram of the solid electrolyte preparatio...

Embodiment 3

[0048] The preparation of 40wt% lithium borohydride / decaborane comprises the following steps:

[0049] At room temperature, in an argon glove box, weigh 200 mg of lithium borohydride powder and 300 m of decaborane powder, put them into agate and grind them evenly, and put the uniformly mixed product into a ball mill tank for high-energy hydrogen-charged ball milling Carry out the ball milling process: the ball-to-material ratio is 40:1, the ball milling speed is 300rpm, the ball milling time is 2h, and the hydrogen charging pressure is 4Mpa. The uniform mixture after ball milling is placed in a high temperature and high pressure sintering resistance furnace for heating and heat preservation. Process parameters: 0.2Mpa argon protection, temperature rise 5°C / min, target temperature and holding temperature 200°C, holding time 15h, cooling with the furnace. The product after cooling is 40 wt% lithium borohydride / decaborane. The schematic diagram of the solid electrolyte preparati...

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Abstract

The invention relates to the technical field of solid electrolyte, in particular to lithium borohydride / decaborane solid electrolyte and a preparation method thereof. The lithium borohydride / decaborane solid electrolyte is a lithium borohydride / decaborane solid electrolyte Li2B12H12 or a mixture of the Li2B12H12 and the Li2B10H10 or a mixture of the Li2B12H12, the Li2B10H10 and the LiBH4. According to the preparation method, lithium borohydride and decaborane are used as raw materials, and the lithium borohydride / decaborane solid electrolyte is prepared through two-step reaction of hydrogen-filled ball milling and one-step heat treatment. The preparation method of the lithium borohydride / decaborane solid electrolyte is simple, environment-friendly and easy for large-scale preparation, andis a preparation method of the LiBH4-based superion conductor solid electrolyte which has popularization value and can realize batch production. The polyanion solid electrolyte prepared by the preparation method is excellent in ion transmission characteristic and excellent in electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of solid electrolytes, in particular to a lithium borohydride / decaborane solid electrolyte and a preparation method thereof. Background technique [0002] Today, lithium-ion batteries have become an integral part of everyday life in today's society. Lithium-ion batteries have the advantages of high specific energy, high specific power, high charge and discharge efficiency, and small self-discharge, and are widely used in electronic products. Nonetheless, substantial improvements in energy density and safety performance are still required for electric vehicles and grid energy storage. [0003] Traditional lithium-ion batteries use electrolytes made of organic solvents or gels. This electrolyte has high lithium ion conductivity, but it is prone to leakage. At the same time, these electrolytes will form lithium dendrites during use, causing the battery to short circuit. , causing a fire. All solid-state batt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058H01M10/0525C01B6/21C01B35/02
CPCH01M10/0562H01M10/058H01M10/0525C01B6/21C01B35/026C01P2002/72C01P2004/80C01P2006/40H01M2300/0068H01M2300/0091Y02E60/10Y02P70/50
Inventor 李永涛彭亚玉李海文斯庭智柳东明张庆安
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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