Preparation method for difluorosulfonylimide salt

A technology of difluorosulfonimide salt and difluorosulfonimide, which is applied in the field of preparation of electrolyte salts for electrochemical devices, can solve problems such as product loss, large environmental protection burden, energy storage density and safety conflicts, and achieve The product yield is improved, the reaction temperature is precisely controlled, and it is beneficial to the removal of heat

Inactive Publication Date: 2017-02-22
JIUJIANG TINCI ADVANCED MATERIALS CO LTD
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Problems solved by technology

[0002] Since 2014, the country's strong support for new energy vehicles has promoted the explosive growth of the industry, but at present there is still a bottleneck in the most critical power battery technology that is contradictory between energy storage density and safety, and it is urgent to develop new high-performance Materials to break

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  • Preparation method for difluorosulfonylimide salt
  • Preparation method for difluorosulfonylimide salt
  • Preparation method for difluorosulfonylimide salt

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Embodiment 1～6

[0030] The preparation method of difluorosulfonimide salt, comprises the following steps:

[0031] (1) Preparation of difluorosulfonimide (see Table 1 for specific preparation parameters): use a metering device to feed liquid dichlorosulfonimide and fluorine-containing gas into the microchannel reactor, wherein dichlorosulfonimide The flow rate is 30kg / h. After the two raw materials are reacted in the microchannel reactor, the gas-liquid separation is carried out first, and then the liquid phase is subjected to vacuum distillation, and the fraction at 98-102°C / 15mmHg is collected to obtain difluorosulfonimide Colorless transparent liquid. (2) Preparation of difluorosulfonimide salt (see Table 2 for specific preparation parameters): Dissolve difluorosulfonimide in an organic solvent, then add an oxide of an alkali metal or an oxide of an alkaline earth metal, in- React at 20-10°C for 1-12 hours to obtain the difluorosulfonimide salt. After the reaction is completed, filter at ro...

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Abstract

The invention belongs to the technical field of preparation of electrolyte salts used for electrochemical devices, and specifically relates to a preparation method with advantages of safe reaction process, simple operation method, high product production capacity, simple post-treatment, applicability to large-scale production and capability of obtaining high-purity difluorosulfonylimide salt meeting the use requirements of electronic chemicals. The preparation method comprises the following steps: (1) introducing dichlorosulfonylimide and fluorine-containing gas into a micro-channel reactor, and carrying out a reaction at 36 to 120 DEG C for 60 to 600 s so as to obtain difluorosulfonylimide; (2) adding the obtained difluorosulfonylimide and an oxide of alkali metal or an oxide of alkaline-earth metal into an organic solvent, and carrying out a reaction at minus 20 to 10 DEG C for 1 to 12 h so as to obtain the difluorosulfonylimide salt.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrolyte salts for electrochemical devices, and in particular relates to a preparation method of difluorosulfonimide salt. Background technique [0002] Since 2014, the country's strong support for new energy vehicles has promoted the explosive growth of the industry, but at present there is still a bottleneck in the most critical power battery technology that is contradictory between energy storage density and safety, and it is urgent to develop new high-performance materials to break through the predicament. The development of core electrolyte salts for electrolytes is one of the key links. In recent research and evaluation, difluorosulfonimide salts are considered to have high conductivity and high thermal stability, and are very suitable for high-power, high-low temperature and other power batteries. application environment. [0003] There have been many reports on the synthesis me...

Claims

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Application Information

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IPC IPC(8): C01B21/086
CPCC01B21/086C01P2006/80
Inventor 陈晓军刘雅婷陈文礼
Owner JIUJIANG TINCI ADVANCED MATERIALS CO LTD
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