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Fluoro-alkyl lithium phosphate, and application as electrolytic salt

A fluoroalkyl lithium phosphate and hydrofluoric acid technology, applied in the field of electrolyte salts, can solve problems such as reducing battery performance and lifespan

Inactive Publication Date: 2005-01-12
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the thermal stability and hydrolysis resistance of these lithium salts are significantly higher than those of lithium hexafluorophosphate, they can still undergo hydrolysis within a few days in the presence of traces of water, thus reducing the performance of batteries based on these salts when these electrolyte salts are used. performance and life

Method used

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  • Fluoro-alkyl lithium phosphate, and application as electrolytic salt
  • Fluoro-alkyl lithium phosphate, and application as electrolytic salt

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Experimental program
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Embodiment

[0142]The invention is illustrated below with the aid of examples. But this embodiment is only used to illustrate the present invention, not to limit the general scope of the present invention.

[0143] Lithium tris(nonafluoro-n-butyl)trifluorophosphate

[0144] first step

[0145] Synthesis of Tris(nonafluoro-n-butyl)difluorophosphorane

[0146] The synthesis of tris(nonafluoro-n-butyl)difluorophosphorane was carried out using a stainless steel cylindrical double-walled vessel (total volume 1.5 liters) as an electrolytic cell. This electrolytic cell is equipped with nickel cathode and nickel anode, each with 15.6dm 2 Effective area. The temperature of the electrolytic cell was 0°C.

[0147] In the electrolytic cell, 1125g of liquid hydrofluoric acid was pre-electrolyzed for 100 hours. Subsequently, a total of 268.0 g of tributylphosphine was added in seven batches as a 34.8 or 43.6% solution in hydrofluoric acid as shown in Table 1 below.

[0148] Amount of t...

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Abstract

The present invention relates to lithium fluoroalkylphosphates, a process for preparing them and their use as electrolyte salts in batteries, capacitors, supercapacitors and electrolytic cells.

Description

technical field [0001] The present invention relates to lithium fluoroalkylphosphates, processes for their preparation and their use as electrolyte salts in batteries, capacitors, supercapacitors and electrolytic cells. Background technique [0002] In recent years, the popularity of portable electrical appliances such as laptop and palmtop computers, mobile phones and video cameras and the resulting demand for high-power portable batteries have grown significantly worldwide. [0003] Given this surge in demand for batteries and the associated ecological concerns, the importance of developing long-life rechargeable batteries is steadily increasing. [0004] Lithium-ion rechargeable batteries have been commercially available since the early 1990's. Most of these lithium ion batteries use lithium hexafluorophosphate as the electrolyte salt. However, this lithium salt is a compound that is extremely sensitive to hydrolysis and has poor thermal stability, so that due to the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F1/02C07F9/28C07F9/535C07F19/00C25B3/28H01G9/02H01G9/022H01G11/62H01M4/60H01M6/16H01M10/05H01M10/052H01M10/0525H01M10/0568H01M10/0569H01M10/36H01M10/40
CPCY02E60/122H01M10/0568C07F9/28H01M10/0525H01M6/168Y02E60/12H01G9/038H01G11/62Y02E60/13
Inventor U·黑德尔A·库尼尔M·司彻米迪特N·伊格纳逖弗P·萨忒瑞
Owner MERCK PATENT GMBH
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