Tantalum-doped cubic garnet structured Li7La3Zr<2-x>TaxO12 material synthesized via intermediate phase, and synthesis method thereof

Abstract

The invention discloses a tantalum-doped cubic garnet structured Li7La3Zr<2-x>TaxO12 material synthesized via an intermediate phase, and a synthesis method thereof. The synthesis method comprises following steps: step 1, lanthanum zirconate, a lanthanum source, a lithium source, and a tantalum source used for doping are weighed at a metal element molar ratio according with that of Li7La3Zr<2-x>TaxO12, and the above materials are fully mixed; step 2, an obtained mixture is dried at 80 DEG C for 4 to 6h, and is grinded for 30min so as to obtain a raw material precursor; and step 3, the raw material precursor is subjected to roasting at 900 DEG C for 3 to 5h, so as to obtain a one time roasted product of Li7La3Zr<2-x>TaxO12, wherein x ranges from 0.25 to 1. According to the synthesis method, lanthanum zirconate is taken as a raw material; the tantalum-doped cubic garnet structured Li7La3Zr<2-x>TaxO12 material is convenient to prepare; technical route is simple; roasting time can be shortened greatly; energy consumption is reduced; lithium high temperature loss is reduced; and the synthesis method is suitable for large scale production.

Description

technical field [0001] The invention belongs to the field of electrolyte materials for lithium ion batteries, and relates to a preparation method of an inorganic oxide, in particular to a tantalum-doped garnet structure Li 7 La 3 Zr 2-x Ta x o 12 The method of preparation of the material. Background technique [0002] Rechargeable lithium batteries are playing an increasingly important role in the electronic product market and mobile power sources such as electric vehicles. With the development of society, the rapid popularization of mobile Internet and the wide application of Internet of Things technology, wearable devices have increasingly become an indispensable part of people's daily life, smart home, health care and sports and fitness. As a power source for wearable devices, lithium batteries are required to be light in weight, high in safety, and can be made into any shape. However, most of the organic liquid electrolytes currently used have potential safety haza...

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Problems solved by technology

The solid-state reaction method is a commonly used material preparation method in the industry, but in the existing solid-state reaction, it is basically necessary to roast the raw materials for a long time (6-12h), and the roasting temperature is mostly at 900°C or above. Not only will it cause a large amount of energy consumption, but it will also cause a large amount of Li element to be lost at high temperature, which will increase the cost of production and processing.

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