Solid electrolyte membrane and lithium ion battery

A solid electrolyte membrane, solid electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of poor crystallinity, affecting the conductivity of lithium ions, and blocking lithium ion diffusion.
CN103390769AActive Publication Date: 2013-11-13CONTEMPORARY AMPEREX TECH CO
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CONTEMPORARY AMPEREX TECH CO
Publication Date
2013-11-13

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Abstract

The invention provides a solid electrolyte membrane and a lithium ion battery. The solid electrolyte membrane comprises solid electrolyte crystal particles and a binder, wherein a general formula of a solid electrolyte crystal is (LimZn)MP2X12, and the solid electrolyte crystal belongs to a triclinic system and a P1 space group; Z refers to high-valence metallic elements, the valence of the Z is larger than 1 and smaller than or equal to 3; the high-valence metallic elements Z comprise at least one of Mg, Al, Ca, Ti, Cu, Zn, In, Sr, Ru, Rh, Pd, Ag, Cd, Ba, Qs, Ir, Pt and Hg; M is at least one of Ge, Si, Sn, Al and P; X is at least one of O, S and Se; m is a rational number from 8 to 11; n is a rational number from 0-2; in the solid electrolyte membrane, a plane included angle Alpha1 of the crystal axis c axis direction of more than 80% of (LimZn)MP2X12 and the solid electrolyte membrane is larger than or equal to -15 degrees and is smaller than or equal to 15 degrees. The lithium ion battery comprises the above solid electrolyte membrane. Therefore, the conduction velocity of Lithium-ions can be effectively improved, and the rate capability and the cycle performance can be improved effectively.
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Description

technical field

[0001] The invention relates to the field of lithium ion batteries, in particular to a solid electrolyte membrane and a lithium ion battery. Background technique

[0002] Lithium-ion batteries have the advantages of high energy density, long service life, high working voltage, stable discharge, no memory effect, and environmental protection. They have been widely used in portable electronic devices. Its working principle involves many fields such as physical chemistry, materials and energy. At present, the main problem of lithium-ion batteries is that the safety performance of the liquid electrolyte system used in high-power charging and discharging cannot be guaranteed when it is used on a large scale, especially in the application of hybrid or pure electric vehicles. The emergence of all-solid-state lithium-ion batteries may significantly improve their safety performance. Compared with traditional liquid organic electrolytes, solid-state electrolytes are ...

Claims

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