An oxygen ion conductive metal-metal oxide molten salt secondary battery and its preparation method

Abstract

The invention is a new battery with oxygen ion conduction, which uses the oxide of a relatively inactive metal (such as copper, etc.) as the positive electrode, the active metal (such as iron, zinc, etc.) . During the discharge process, the oxygen ions in the metal oxide of the positive electrode enter the electrolyte, the positive electrode is reduced to a simple metal, the oxygen ions are transported to the negative electrode through the electrolyte, and form oxides with the negative metal; the charging process is the opposite. Therefore, the charge and discharge of the battery depends on the migration of oxygen ions in the electrolyte between the positive and negative electrodes to achieve charge and discharge, and the difference in the binding energy between the positive and negative metals and oxygen stores electrical energy. The metal materials and electrolytes of the battery are rich in sources and cheap, the battery manufacturing process is simple, and the metal electrodes are convenient to recycle, which is suitable for large-scale energy storage.

Description

technical field

[0001] The invention belongs to the technical field of new energy electrochemical energy storage batteries, in particular to a design and manufacture method of a novel oxygen ion conductive metal-metal oxide large-scale energy storage molten salt secondary battery. Background technique

[0002] With the development of society, people's demand for energy is also increasing rapidly, while the reserves of traditional fossil energy are limited. In addition, the greenhouse effect and environmental pollution caused by burning fossil energy are becoming more and more serious. The energy and environmental crisis has become the 21st century. biggest challenge. At present, all countries are committed to supporting the development of new energy sources such as solar energy and wind energy. However, solar energy and wind energy have the disadvantages of uneven distribution of time and space, which has a great impact on the power grid. The phenomenon of abandoning wind an...

Examples

Embodiment 1

[0047] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0048] (1) Preparation of iron oxide negative electrode and copper positive electrode:

[0049] Take a clean copper wire and an iron wire with a length of 40 cm and a diameter of 1.5 mm, respectively, bend the copper wire and iron wire into a mosquito coil shape, and then put the iron wire into the muffle furnace, heat it up to 500 °C at 10 °C / min, and keep the temperature for 30 min, take out after cooling to obtain a copper wire positive electrode and an iron oxide negative electrode.

[0050] (2) Preparation of electrolyte:

[0051] Weigh 42 g of KOH and 30 g of NaOH into an alumina crucible and mix evenly, then heat to 300°C on a heating table until NaOH and KOH are melted.

[0052] (3) Assemble the battery:

[0053] Put the copper wire and iron oxide prepared in step (1) into the electrolyte prepared in ste...

Embodiment 2

[0062] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0063] (1) Preparation of copper positive electrode and foamed iron oxide negative electrode:

[0064] Cut a piece of clean copper with a size of 2 × 3 cm, take a piece of foam iron and cut a piece of size 2 × 3 cm, and then put the foam iron into the muffle furnace, heat it up to 500 ° C at 10 °C / min, and keep it warm for 30 min, take it out after cooling to obtain a copper wire positive electrode and a foamed iron oxide negative electrode.

[0065] Step (2) is the same as step (2) in Example 1.

[0066] Step (3) is the same as step (3) in Example 1.

[0067] (4) Battery test:

[0068] The constant current charge-discharge test was performed with a current of 10 mA cm-2.

[0069] (5) Electrochemical characterization:

[0070] The foamed iron electrode after 1000 cycles was characterized by scanning electron m...

Embodiment 3

[0075] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0076] (1) Preparation of copper positive electrode and zinc oxide negative electrode:

[0077] Cut a clean copper sheet of 4×6 cm size, and cut a zinc sheet of 4×6 cm size. The surface of the zinc sheet is covered with an oxide film, so it does not need to be treated. Zinc negative.

[0078] (2) Preparation of electrolyte:

[0079]Take 70 g of analytically pure potassium hydroxide and 50 g of analytically pure sodium hydroxide into a square crucible and mix evenly, and heat on a heating table at 300°C until the sodium hydroxide and potassium hydroxide are completely melted to a liquid state.

[0080] (3) Assemble the battery:

[0081] Put the electrolytic sheet prepared in step (1) into the molten salt prepared in step (2), and then rapidly reduce the temperature of the molten salt to 170 °C until the molten sa...

technical field

[0001] The invention belongs to the technical field of new energy electrochemical energy storage batteries, in particular to a design and manufacture method of a novel oxygen ion conductive metal-metal oxide large-scale energy storage molten salt secondary battery. Background technique

[0002] With the development of society, people's demand for energy is also increasing rapidly, while the reserves of traditional fossil energy are limited. In addition, the greenhouse effect and environmental pollution caused by burning fossil energy are becoming more and more serious. The energy and environmental crisis has become the 21st century. biggest challenge. At present, all countries are committed to supporting the development of new energy sources such as solar energy and wind energy. However, solar energy and wind energy have the disadvantages of uneven distribution of time and space, which has a great impact on the power grid. The phenomenon of abandoning wind an...

Examples

Embodiment 1

[0047] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0048] (1) Preparation of iron oxide negative electrode and copper positive electrode:

[0049] Take a clean copper wire and an iron wire with a length of 40 cm and a diameter of 1.5 mm, respectively, bend the copper wire and iron wire into a mosquito coil shape, and then put the iron wire into the muffle furnace, heat it up to 500 °C at 10 °C / min, and keep the temperature for 30 min, take out after cooling to obtain a copper wire positive electrode and an iron oxide negative electrode.

[0050] (2) Preparation of electrolyte:

[0051] Weigh 42 g of KOH and 30 g of NaOH into an alumina crucible and mix evenly, then heat to 300°C on a heating table until NaOH and KOH are melted.

[0052] (3) Assemble the battery:

[0053] Put the copper wire and iron oxide prepared in step (1) into the electrolyte prepared in ste...

Embodiment 2

[0062] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0063] (1) Preparation of copper positive electrode and foamed iron oxide negative electrode:

[0064] Cut a piece of clean copper with a size of 2 × 3 cm, take a piece of foam iron and cut a piece of size 2 × 3 cm, and then put the foam iron into the muffle furnace, heat it up to 500 ° C at 10 °C / min, and keep it warm for 30 min, take it out after cooling to obtain a copper wire positive electrode and a foamed iron oxide negative electrode.

[0065] Step (2) is the same as step (2) in Example 1.

[0066] Step (3) is the same as step (3) in Example 1.

[0067] (4) Battery test:

[0068] The constant current charge-discharge test was performed with a current of 10 mA cm-2.

[0069] (5) Electrochemical characterization:

[0070] The foamed iron electrode after 1000 cycles was characterized by scanning electron m...

Embodiment 3

[0075] The preparation method of the oxygen ion conductive metal-metal oxide molten salt secondary battery of the present embodiment includes the following steps:

[0076] (1) Preparation of copper positive electrode and zinc oxide negative electrode:

[0077] Cut a clean copper sheet of 4×6 cm size, and cut a zinc sheet of 4×6 cm size. The surface of the zinc sheet is covered with an oxide film, so it does not need to be treated. Zinc negative.

[0078] (2) Preparation of electrolyte:

[0079]Take 70 g of analytically pure potassium hydroxide and 50 g of analytically pure sodium hydroxide into a square crucible and mix evenly, and heat on a heating table at 300°C until the sodium hydroxide and potassium hydroxide are completely melted to a liquid state.

[0080] (3) Assemble the battery:

[0081] Put the electrolytic sheet prepared in step (1) into the molten salt prepared in step (2), and then rapidly reduce the temperature of the molten salt to 170 °C until the molten sa...

Images