Electrolyte of fluorine-containing silane substituent compound and battery composed of electrolyte

A technology of fluorine-containing silane and electrolyte, applied in the field of electrochemical energy storage, can solve problems such as performance deterioration, and achieve the effect of various performance improvement and excellent comprehensive performance.

Pending Publication Date: 2022-07-22
香河昆仑新能源材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this additive is difficult to solve the problem of battery performance degradation due to the decomposition of lithium hexafluorophosphate at high temperature

Method used

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  • Electrolyte of fluorine-containing silane substituent compound and battery composed of electrolyte
  • Electrolyte of fluorine-containing silane substituent compound and battery composed of electrolyte
  • Electrolyte of fluorine-containing silane substituent compound and battery composed of electrolyte

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Experimental program
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Embodiment Construction

[0024] In order to facilitate understanding of the present invention, the present invention will be described more fully below. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

[0025] The general test platform used in the examples is as follows:

[0026] The positive electrode of this experiment adopts the binder PVDF-S5130, composite conductive agent Super-P / KS-6 (mass ratio Super-P: KS-6=2:1), 622 nickel cobalt manganese ternary positive electrode material or lithium cobalt oxide positive electrode Materials, solvent NMP (N-methyl-2-pyrrolidone, N-methylpyrrolidone), negative electrode using C-P15, conductive agent Super-P solvent CMC, H 2 O and binder SBR are used as raw materials. The slurry is prepared by wet pulping process. The positive electrode adjusts the viscosity...

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Abstract

The invention discloses an electrolyte of a fluorine-containing silane substituent compound and a battery composed of the electrolyte. The electrolyte comprises an electrolyte, an organic solvent and a fluorine-containing silane substituent compound as shown in a formula I in the specification. According to the electrolyte, the compound shown in the formula I is added, when the electrolyte is used in a battery, the performance of the obtained battery in multiple aspects is improved, the 3C discharge rate at the normal temperature is 79.4% or above at the 3C charge rate, the 1C discharge rate at the temperature of-20 DEG C is 80.7% or above at the temperature of-20 DEG C, and the capacity retention rate of 3C charge / 1C discharge cycle at the normal temperature is 82.5% or above at the room temperature. The capacity retention ratio of 800 times of 3C charging / 1C discharging cycles at the high temperature of 45 DEG C is 81.7% or above, and the comprehensive performance is excellent.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy storage, and particularly relates to an electrolyte containing a fluorine silane substituent compound and a battery composed of the electrolyte. Background technique [0002] At present, the organic electrolyte materials used in the lithium battery industry are mainly alkyl carbonate compounds and LiPF 6 Lithium salt system, its performance is greatly reduced at high temperature (above 60°C), while power batteries for electric vehicles require a higher operating temperature range (about -30 to 80°C); moreover, alkyl carbonate organic electrolyte materials It has high flammability, so there are huge hidden dangers in safety; especially in the field of hybrid and all-electric vehicle applications, long-term cycle problems and safety are important factors that restrict the practical application of these materials. [0003] Electrolyte is an important part of lithium-ion battery, which...

Claims

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Application Information

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IPC IPC(8): H01M10/0567
CPCH01M10/0567H01M2300/0025H01M2220/20
Inventor 孙春胜张和平郭营军李新丽申海鹏吕亮顿温新乔顺攀
Owner 香河昆仑新能源材料股份有限公司
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