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Electrolyte and battery

A technology of electrolyte and electrolyte salt, which is applied in the direction of battery, secondary battery, secondary battery repair/maintenance, etc. It can solve the problem that silicon-containing electrodes cannot maintain stable performance, improve cycle stability and safety performance, and prevent damage Shedding, high mechanical strength effect

Pending Publication Date: 2022-03-01
BASF BATTERY MATERIALS SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that silicon-containing electrodes in the prior art cannot maintain stable performance under cyclic use, the present invention provides an electrolyte and battery

Method used

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  • Electrolyte and battery
  • Electrolyte and battery
  • Electrolyte and battery

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0092] This embodiment is used to illustrate the electrolyte and the battery disclosed in the present invention, including the following steps:

[0093] Battery preparation: the positive electrode uses a silicon carbon electrode with a theoretical capacity of 500mA·h / g, and the negative electrode uses a metal Li negative electrode.

[0094] Electrolyte A: Dissolve 1M lithium 1,1,2,2,3,3-hexafluoro-1,3-disulfonylimide in ethylene carbonate (EC) and ethyl methyl carbonate (EMC) In solvent, wherein, EC:EMC=1:1;

[0095] Add 5wt% ethylene sulfate (DTD) and 20wt% bis(2,2,2-trifluoroethyl)methyl phosphate (BTFMP) to the solvent.

Embodiment 2-11

[0097] Embodiments 2-11 are used to illustrate the electrolyte and battery disclosed in the present invention, including most of the operating steps in Embodiment 1, the difference being:

[0098] The positive electrode materials, negative electrode materials, solvents, electrolyte salts and additives shown in Examples 2-11 in Table 1 were used.

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Abstract

In order to solve the problem that in the prior art, a silicon-containing electrode cannot keep stable performance under recycling, the invention provides an electrolyte which comprises a compound as shown in a structural formula I, a sulfate compound as shown in a structural formula II and a solvent. The invention also provides a battery which comprises a positive electrode material, a negative electrode material and the electrolyte provided by the invention, and the positive electrode material and / or the negative electrode material comprise monatomic silicon or a silicon-based compound. The electrolyte provided by the invention can effectively improve the cycling stability of the silicon-containing electrode.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to an electrolyte and a battery. Background technique [0002] At present, the energy problem is becoming more and more serious and the environmental pollution continues to worsen. In order to achieve sustainable development, the utilization and development of new energy and renewable energy has become a research hotspot. Water energy, wind energy, hydrogen energy, nuclear energy, tidal energy, and solar energy have been vigorously developed and utilized in countries all over the world. These energy sources have relatively unpredictable and changeable characteristics, which have a great impact on the reliability of the power grid. The development of energy storage technology can effectively solve this problem, so that new energy and renewable energy can be stored and applied in a stable form. Among the many energy storage devices, electrochemical energy storage batter...

Claims

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Application Information

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IPC IPC(8): H01M10/0567H01M10/0525H01M10/42
CPCH01M10/0567H01M10/0525H01M10/4235H01M2200/00Y02E60/10
Inventor 邓永红肖映林钱韫娴胡时光向晓霞林雄贵周密金丽华
Owner BASF BATTERY MATERIALS SUZHOU