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Synthesis method and novel application of hexafluorine lithium titanate

A technology of lithium hexafluorotitanate and its synthesis method, which is applied in the research field of lithium-ion batteries, and can solve the problems of reducing the performance of lithium-ion batteries and limited conductivity

Active Publication Date: 2013-07-17
江西石磊氟材料有限责任公司
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Problems solved by technology

In the prior art, lithium hexafluorophosphate is mainly used as the electrolyte, and its conductivity is still limited, which will reduce the performance of lithium-ion batteries

Method used

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  • Synthesis method and novel application of hexafluorine lithium titanate
  • Synthesis method and novel application of hexafluorine lithium titanate
  • Synthesis method and novel application of hexafluorine lithium titanate

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preparation Embodiment 2

[0029] In the first step, titanium dioxide TiO 2 The powder is prepared as a 25% suspension, and under heating and stirring, 60% hydrofluoric acid is added dropwise to the titanium dioxide suspension to obtain transparent fluorotitanic acid H 2 TiF 6 solution;

[0030] In the second step, the lithium carbonate powder is prepared into a 30% lithium carbonate suspension with pure water, and under heating and stirring, 60% hydrofluoric acid is added dropwise to the lithium carbonate suspension to obtain a lithium fluoride suspension ; filter the lithium fluoride suspension, wash the filter cake with pure water, take the filter cake that is lithium fluoride, and prepare the lithium fluoride into a 30% lithium fluoride suspension with pure water;

[0031] In the third step, the lithium fluoride suspension prepared in the second step is added dropwise to the transparent fluorotitanic acid solution prepared in the first step to prepare a transparent lithium hexafluorotitanate solut...

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Abstract

The invention provides a synthesis method and novel application of hexafluorine lithium titanate. The synthesis method comprises the following steps of: step one, preparing a transparent fluorine lithium titanate H2TiF6 solution; step two, preparing a lithium fluoride suspension, filtering the lithium fluoride suspension, taking the filter cake, namely, the lithium fluoride, preparing the lithium fluoride into a 20-30% lithium fluoride suspension by using pure water; step three, dropping the lithium fluoride suspension prepared in the step two into the transparent fluorine lithium titanate solution prepared in the step one, and preparing so as to obtain a transparent hexafluorine lithium titanate solution; and step four, stirring and heating the hexafluorine lithium titanate solution prepared in the step three, washing and crystallizing the filter cake by using pure water, heating and drying the crystal, naturally cooling down and grinding and crushing so as to obtain hexafluorine lithium titanate powder. The synthesized hexafluorine lithium titanate is high in purity, and when the hexafluorine lithium titanate is applied to lithium battery electrolyte with the hexafluorine lithium, the conductivity of the battery electrolyte is greatly improved, so that the performance of a lithium battery is improved.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery research, and in particular relates to a synthesis method of lithium hexafluorotitanate and its new application. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density ratio and low environmental load. Therefore, they are widely used in portable electronic devices, and will be widely used in electric vehicles, energy storage power stations and other fields in the future. [0003] As one of the important components of lithium-ion batteries, electrolyte is an indispensable part to complete the electrochemical reaction. In the prior art, lithium hexafluorophosphate is mainly used as the electrolyte, and its conductivity is still limited, which will reduce the performance of the lithium ion battery. Contents of the invention [0004] Aiming at the defects existing in the prior art, the present invention provides a synthesis method of lithium ...

Claims

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Application Information

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IPC IPC(8): C01G23/00
Inventor 石世昆
Owner 江西石磊氟材料有限责任公司
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