JP-7854730-B2 - Aluminum battery

Inventors

• 呉 瑞軒
• 蔡 施柏達
• 楊 竣傑
• 陳 韋安

Assignees

• 亞福儲能股▲分▼有限公司

Dates

Publication Date

20260507

Application Date

20240805

Priority Date

20231229

Claims (7)

1. Positive electrode and, The negative electrode and, A separator is installed between the positive electrode and the negative electrode, The separator, the positive electrode, and the negative electrode are impregnated with an electrolyte solution, An aluminum battery comprising, wherein the electrolyte comprises aluminum halide, an ionic liquid, and an additive, the additive comprising an isocyanate compound, and the isocyanate compound further comprising an acrylic acid functional group.
2. The aluminum battery according to claim 1, wherein the weight ratio of the aluminum halide, the ionic liquid, and the additive in the electrolyte is, in descending order, aluminum halide, ionic liquid, and additive.
3. The aluminum battery according to claim 1, wherein the total weight of the electrolyte is 100 wt%, and the weight ratio of the additive in the electrolyte is 0.2 wt% or more.
4. The aluminum battery according to claim 1, wherein the total weight of the electrolyte is 100 wt%, and the weight ratio of the aluminum halide in the electrolyte is between 49 wt% and 65 wt%.
5. The aluminum battery according to claim 1, wherein the total weight of the electrolyte is 100 wt%, and the weight ratio of the ionic liquid in the electrolyte is between 35 wt% and 51 wt%.
6. The aluminum battery according to claim 1, wherein the total weight of the electrolyte is 100 wt%, and the sum of the weight ratios of the aluminum halide, the ionic liquid, and the additives in the electrolyte is 100 wt%.
7. The aluminum battery according to claim 1, wherein the aluminum halide contains aluminum chloride, and the ionic liquid contains 1-ethyl-3-methylimidazolium chloride.

Description

This invention relates to an aluminum battery. During the manufacturing process of aluminum batteries, external moisture easily penetrates the electrolyte, leading to the generation of harmful gases during the charging and discharging processes, resulting in reduced performance (e.g., decreased Coulomb efficiency). Furthermore, while the energy storage reaction in aluminum batteries involves the deposition and dissolution of aluminum, if the rates of deposition and dissolution are not balanced, or if aluminum dendrites are formed due to the accumulation of charge on the electrode surface, both of these factors reduce the battery's lifespan. This is a schematic diagram showing the results of the moisture content test for the examples and comparative examples.This is a schematic diagram showing the results of the active substance test in the example.This is a schematic diagram showing the results of the mean Coulomb efficiency test for the examples and comparative examples.This is a schematic diagram showing the results of the life test for the examples and comparative examples.This is a schematic diagram of a portion of an electrochemical apparatus for performing cycle charge-discharge experiments in the present invention.This is a schematic diagram showing the results of the corrosion test for Comparative Example 1.This is a schematic diagram showing the results of the corrosion test in Example 2. To facilitate a clearer understanding of the present invention, embodiments are provided below to demonstrate that the invention is a reliably implementable example. For clarity, many practical details are also described below. However, it should be understood that these practical details are not intended to limit the invention. In other words, these practical details are not essential in some embodiments of the present invention. To clearly explain the present invention, this text omits a description of known aluminum battery design rules. However, a person with ordinary skill in the art can design the battery according to actual needs without departing from the spirit and scope of the present invention. The present invention will be described more comprehensively with reference to the drawings of this embodiment. However, the present invention can be embodied in various different forms and should not be limited to the embodiments described herein. The thickness, dimensions, or size of layers and regions in the drawings are exaggerated for clarity. The same or similar reference numerals indicate the same or similar elements, which will not be repeated in the following paragraphs. Unless otherwise defined, all technical terms (including technical and scientific terms) used herein have the same meaning as those ordinarily understood by an engineer with ordinary skill in the art to which this invention pertains. Unless otherwise stated, the term “between” used herein to define a numerical range encompasses values equal to the given endpoint values and the range between the given endpoint values. For example, when a dimension range is said to be between a first number and a second number, it means that the dimension range may encompass the first number, the second number, and any values between the first and second numbers. First, it should be explained that this text applies to situations where the electrolyte of an aluminum battery contains trace amounts of moisture. Since this trace amount of moisture originates from the external environment during the manufacturing process, its weight may be ignored when describing the total weight of the electrolyte below. In this embodiment, the aluminum battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte, the separator being placed between the positive and negative electrodes, and the electrolyte impregnating the separator, positive electrode, and negative electrode. Here, the positive electrode, negative electrode, separator, and electrolyte can be arranged relative to each other in a suitable manner known in the field of aluminum batteries, but the present invention is not limited thereto. Furthermore, the electrolyte contains aluminum halide, an ionic liquid, and an additive, the additive being an isocyanate compound. This embodiment introduces an electrolyte containing an isocyanate compound into the design of an aluminum battery. The reaction between the isocyanate functional group and water in the electrolyte reduces the water content, suppressing the generation of harmful gases and promoting the dissolution aluminum reaction at the negative electrode, thereby suppressing the formation of aluminum dendrites. In this way, the service life can be effectively improved while maintaining excellent performance. It should be noted that, since this invention is an aluminum battery design, the electrolyte uses aluminum halide and an ionic liquid capable of generating active substances such as aluminum ions, which are not electrolyte compo