Solid electrolyte and lithium battery cell with same, and lithium battery

A solid electrolyte, lithium battery technology, applied in non-aqueous electrolyte battery, electrolyte battery manufacturing, lithium battery and other directions, can solve the problem of poor performance of solid electrolyte, achieve excellent wettability and interface adhesion, excellent viscosity and flexibility , the effect of easy migration

Active Publication Date: 2019-06-25
成都大超科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of poor performance of the existing solid electrolyte, the invention provides a solid electrolyte and its lithium battery cell, lithium battery

Method used

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  • Solid electrolyte and lithium battery cell with same, and lithium battery
  • Solid electrolyte and lithium battery cell with same, and lithium battery
  • Solid electrolyte and lithium battery cell with same, and lithium battery

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The first embodiment of the present invention provides a solid electrolyte, the solid electrolyte includes the solid electrolyte includes Li 3 sn 2 (PO 4 ) 3 and / or Li 3 Ge 2 (PO 4 ) 3 . Further, the solid electrolyte can be obtained through but not limited to solid phase reaction or hydrothermal reaction.

[0029] The lithium ion conductivity in the solid electrolyte is (0.5-11)×10 -2 S / cm; Lithium ion conductivity in the solid electrolyte is (3-10) × 10 -2 S / cm; Specifically, the lithium ion electrolyte in the solid electrolyte is 0.5×10 -2 S / cm, 3×10 -2 S / cm, ...

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Abstract

The invention relates to the field of lithium batteries, in particular to a solid electrolyte and a lithium battery cell with the solid electrolyte, and a lithium battery. The solid electrolyte comprises Li3Sn2(PO4)3 and/or Li3Ge2(PO4)3. The solid electrolyte has a stable structure, has an electrochemical window of above 5V, has better adhesion and flexibility, and has better interface wettabilityand interface adhesion when contacting an electrode layer. The Se and Ge atoms in the structure of the solid electrolyte are weakly bound to Li+, so that the Li ions are easier to migrate, and betterconductivity can be obtained. Furthermore, based on the structural characteristics, the solid electrolyte has the advantages of high shear modulus, high Young's modulus and capability of inhibiting the growth of lithium dendrites.

Description

【Technical field】 [0001] The invention relates to the field of lithium batteries, in particular to a solid electrolyte, a lithium battery cell, and a lithium battery. 【Background technique】 [0002] Compared with traditional liquid electrolytes, all-solid electrolytes have the advantages of high mechanical strength and good safety. However, except for sulfide, the existing solid-state electrolyte systems have low lithium ion conductivity, and generally the ion conductivity at room temperature is less than 10. -3 S / cm, and the sulfide solid electrolyte is very sensitive to water and air, and all the reported solid electrolyte materials have a large interface resistance after contacting the positive and negative electrode materials, resulting in a short cycle life. [0003] However, the inorganic powder or film material used in general solid electrolyte materials is polycrystalline material, which has low lithium ion conductivity, low working voltage, and poor interface wetta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/052H01M10/058
CPCY02E60/10Y02P70/50
Inventor 张晓琨朱焱麟
Owner 成都大超科技有限公司
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