High-temperature stable fibriform lithium air battery and preparation method thereof

Abstract

The invention belongs to the technical field of new energy sources, and specifically relates to a high-temperature stable fibriform lithium air battery and a preparation method thereof. A traditional lithium air battery is restricted by inflammable, explosive and volatile characteristics of an organic electrolyte, the traditional lithium air battery is always unbearable for relatively high temperature in actual using process, and the liquid condition of the electrolyte also has a leakage pollution risk frequently, so that the application of the battery as a flexible fibriform wearable energy source device is restricted. However, ionic liquid has relatively low vapor pressure, relatively wide electrochemical window and excellent stability, so that the fibriform lithium air battery has excellent application prospect. Based on the ionic liquid and a macromolecule skeleton material, a solid polymer electrode capable of resisting high temperature is prepared, and the solid polymer electrode is combined with an orientation carbon nano tube thin film and lithium metal, so that the high-temperature stable fibriform lithium air battery is constructed. The battery can operate stably at the temperature reaching up to 140 DEG C, more than 380 cycles of charge and discharge can be cycled under high current of 10 A g<-1>, and the battery has relatively large application prospect in the field of high-temperature-resistant fabric.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a high-temperature stable fibrous lithium-air battery and a preparation method thereof. Background technique [0002] In recent years, a large number of new wearable energy devices have emerged, among which lithium-air batteries have received extensive attention due to their huge energy density [1,2], thus promoting related research to further improve their electrochemical performance. In addition, an important issue is the performance of lithium-air batteries in extreme environments. For example, in high temperature environment, the commonly used organic electrolyte has potential safety risks due to its flammable, explosive, and volatile characteristics, and the electrochemical window is not wide enough, and the liquid electrolyte also has the risk of leakage during use. , These have limited the development of lithium-air batteries [3,4], so a lithium-air battery...

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Problems solved by technology

However, most of the strategies use inorganic solid electrolytes, which are complicated to prepare and have harsh conditions, and most of the electrolytes are brittle and not flexible enough[5]; another strategy is to use mixed molten salts as electrolytes, which have disadvantages It is reflected in the fact that the temperature must be higher than the melting point of the molten salt to work normally, so it cannot work normally at ordinary room temperature [6]

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