Lithium-enriched anti-perovskite sulfides, solid electrolyte material containing lithium-enriched anti-perovskite sulfides and application of solid electrolyte material

Abstract

The invention discloses lithium-enriched anti-perovskite sulfides and a solid electrolyte material. The general formula of the lithium-enriched anti-perovskite sulfides is (LimMn)3-xS1-y(XaYb)1-z, wherein m is more than 0 and less than or equal to 1, n is more than or equal to 0 and less than to 0.5, (m+n) is less than or equal to 1, a is more than 0 and less than or equal to 1, b is more than or equal to 0 and less than 1, (a+b) is less than or equal to 1, x is more than or equal to 0 and less than or equal to 0.5, y is more than or equal to 0 and less than or equal to 0.5, z is more than or equal to 0 and less than or equal to 0.5 and x=2y+z; M is H, Na, K, Rb, Mg, Ca, Sr, Ba, Y, La, Ti, Zr, Zn, B, Al, Ga, In, C, Si, Ge, P, S or Se; and X is Fe, Cl, Br or I, and Y is a negative ion. The solid electrolyte material has high ion conductivity and thermal stability and a wide working temperature range, and can be applied to lithium ion batteries, rechargeable metal lithium batteries, lithium liquid flow batteries or lithium ion capacitors.

Description

technical field [0001] The invention relates to the technical field of electrolyte materials, in particular to a lithium-rich antiperovskite sulfide, a solid electrolyte material comprising the same and applications thereof. Background technique [0002] Due to the shortage of oil resources and urgent environmental problems, "green environmental protection" has become the focus of people's increasing attention. The core of green environmental protection is "new energy", and the core of new energy is chemical power. It has been more than 200 years since the invention of chemical power sources. It can be traced back to the "Leyden bottle" in the 1840s and 1850s. It has experienced the initial "volt pile", Zn-Cu "Daniel battery", fuel cell, and voltaic battery. , to lead-acid batteries, and then to zinc-manganese dry batteries, nickel-cadmium batteries, nickel-iron batteries, nickel-zinc batteries, nickel-metal hydride batteries, until secondary lithium-ion batteries. Seconda...

AI Technical Summary

Problems solved by technology

However, polymers still have the following problems: (1) The mechanical strength is still poor; (2) The rate performance of the battery still cannot meet the actual needs, and the conductivity of the electrolyte needs to be further improved; (3) The preparation of gel-type polymer electrolytes The process is complex and has high requirements on the environment, which increases its preparation cost

However, this type of electrolyte still has the following problems: (1) the cost is high, and now ionic liquids are mostly synthesized in laboratory scale, the raw materials are expensive, and the finished products are more expensive; (2) the viscosity is relatively high, and the viscosity of ionic liquids at room temperature is that of water Dozens of times to hundreds of times, the ionic liquid is easy to adhere to the wall of the device in use, and there are problems such as slow diffusion; (3) the synthesis conditions are harsh, and the separation and purification of reaction products are difficult, which limits its large-scale production and application; (4) the ionic liquid The basic data of the liquid is lacking, and thousands of ionic liquids have been reported. However, even the ionic liquids that have been studied more often lack the detailed physical and chemical properties necessary for engineering design; (5) ionic liquids are non-volatile and toxic. , the most likely way for it to enter the environment is to enter the water system, and it is difficult to remove after entering the water system, so special work is needed to determine its impact on

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