Manufacture method of lithium lanthanum titanium oxide

Abstract

The invention discloses a making method of Li-La-Ti oxide in the lithium ion battery domain, which comprises the following steps: adopting lithium nitrate, lanthanum nitrate and butyl titanate as raw material with molecular formula as Li3xLa2 / 3-xTiO3 (0<x<0.16); setting the molar rate of Li, La and Ti at 1: 1: 2; adopting alcohol or ethylene glycol monomethyl ether as solvent; or adjusting pH value under 1 through water and acetate; drying solution; sintering under 800-900 deg.c for 2h; obtaining pure LLTO. the invention shortens experimental period and synthesizing temperature with grain size about 200nm, which possesses excellent compact and electric property.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, and relates to a method for synthesizing a solid electrolyte lithium lanthanum titanium oxide compound (LLTO) for lithium ion batteries. Background technique [0002] With the rapid development of electronic technology, a large number of portable electronic products such as notebook computers and mobile phones are increasingly widely used, and higher requirements are placed on secondary batteries that provide energy for these devices. Batteries are required to have smaller size, lighter weight and higher performance. Lithium-ion batteries are superior to other secondary batteries due to their high operating voltage, mass density, and energy density. Therefore, lithium-ion secondary batteries are being used and developed more and more widely. [0003] At present, the vast majority of commercially available electrolytes for lithium-ion batteries are in liquid or gel state. This type of electro...

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Problems solved by technology

In addition, few reports use wet chemical methods (such as sol-gel method) to synthesize LLTO, all of which use expensive alkoxide as raw material, which also limits its application.

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