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Aqueous zinc-tellurium secondary battery

A secondary battery and water system technology, applied in the direction of secondary batteries, battery electrodes, circuits, etc., can solve the problems of getting attention and in-depth research in the battery field, and achieve the effect of high capacity and good cycle performance

Active Publication Date: 2019-07-19
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The basic research on the electrochemical reaction of tellurium-based compounds in the water system has begun in the last century, but it has not received attention and in-depth research in the field of batteries. At present, there is no electrochemical energy storage of tellurium-based materials in the positive valence range. Applied coverage

Method used

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  • Aqueous zinc-tellurium secondary battery
  • Aqueous zinc-tellurium secondary battery
  • Aqueous zinc-tellurium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Electrolyte: 1mol / L aqueous solution of zinc sulfate.

[0049] Positive electrode: Use simple tellurium as the tellurium active material, mix the tellurium active material, conductive agent and binder at a mass ratio of 8:1:1, coat the surface of titanium foil, cut it into a certain size, and dry it in vacuum A tellurium positive electrode sheet was prepared. The conductive agent is conductive carbon black; the binder is polyvinylidene fluoride (PVDF).

[0050] Negative electrode: a zinc sheet with a thickness of 0.15mm.

[0051] A positive electrode sheet, a negative electrode, an aqueous solution of 1 mol / L zinc sulfate, and a separator between the positive electrode and the negative electrode are assembled into a battery; the separator: a glass fiber separator.

[0052] Perform performance tests on the above assembled electrodes:

[0053] Depend on figure 2 It can be seen that a pair of obvious redox peaks appear in the cyclic voltammetry curve of the aqueous zi...

Embodiment 2

[0057] Electrolyte: 2mol / L zinc sulfate aqueous solution.

[0058] Positive electrode: tellurium dioxide is used as the tellurium active material, the tellurium active material, the conductive agent and the binder are mixed in a mass ratio of 6:3:1, coated on the surface of the titanium foil, cut into a certain size, and baked in a vacuum Dry the tellurium positive electrode sheet. The conductive agent is conductive carbon black; the binder is polyvinylidene fluoride (PVDF).

[0059] Negative electrode: zinc sheet with a thickness of 0.15mm;

[0060] A battery is assembled with a positive electrode sheet, a negative electrode, a 2mol / L zinc sulfate aqueous solution, and a separator between the positive electrode and the negative electrode; diaphragm: glass fiber diaphragm.

[0061] Perform performance tests on the above assembled electrodes:

[0062] Depend on Figure 5 It can be seen that the charging and discharging behavior of the aqueous zinc-tellurium secondary batter...

Embodiment 3

[0065] Electrolyte: 2mol / L aqueous solution of zinc trifluoromethanesulfonate.

[0066] Positive electrode: Use simple tellurium as the tellurium active material, mix the tellurium active material, conductive agent and binder at a mass ratio of 7:2:1, coat the surface of titanium foil, cut it into a certain size, and dry it in vacuum A tellurium positive electrode sheet was prepared. The conductive agent is conductive carbon black; the binder is sodium carboxymethyl cellulose (CMC).

[0067] Negative electrode: Use commercially available zinc powder or zinc alloy powder as the zinc active material, mix the zinc active material, conductive agent, porous carbon material and binder in a mass ratio of 6:2:2:1, and coat it on the stainless steel The surface of the foil is cut into a certain size and dried in a vacuum to obtain a zinc powder negative electrode; the conductive agent is conductive carbon black; the binder is PVDF; the porous carbon material is activated carbon.

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Abstract

The invention belongs to the field of secondary batteries, and particularly relates to a zinc-tellurium-based aqueous secondary battery. According to the aqueous secondary battery, a positive electrode contains tellurium; a negative electrode contains zinc; and a water system electrolyte and a diaphragm are arranged between the positive electrode and the negative electrode. The aqueous secondary battery is mainly based on an energy storage mechanism of a redox reaction of compounds (tellurium dioxide or tellurous acid) of elementary tellurium and tetravalent tellurium in the aqueous electrolyte at the positive electrode and a dissolution (oxidation)/deposition (reduction) reaction of zinc ions at the negative electrode, so that the aqueous zinc-tellurium secondary battery has the advantages of high capacity, long cycle life, safety, environment-friendliness and the like, and can be widely applied to the important fields of consumer electronic equipment, intelligent devices, electric vehicles, communication, aerospace, scale energy storage and the like.

Description

technical field [0001] The invention belongs to the field of secondary batteries, in particular to a zinc-tellurium-based aqueous secondary battery. Background technique [0002] The increasingly severe energy and environmental situation has brought great challenges to human survival. Accelerating the cultivation and development of new energy industries is not only an urgent task to effectively alleviate energy and environmental pressures and promote sustainable development, but also to accelerate industrial transformation and upgrading and cultivate new energy industries. Strategic initiatives for economic growth and international competitive advantage. Lithium-ion batteries have basically monopolized the market share of consumer electronics batteries, and are also marching towards more valuable electric vehicles. But unfortunately, due to the limitations of its own electrochemical mechanism and materials used, lithium-ion batteries are flammable and explosive, making them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/36H01M10/38H01M4/38
CPCH01M4/38H01M10/36H01M10/38Y02E60/10Y02P70/50
Inventor 崔光磊赵井文王进芝王延涛
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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