Flexible cell based on metallic oxide/graphene composite macroscopic fibers and preparation method

A graphene composite and macro-fiber technology, which is applied in the manufacture of secondary batteries, battery electrodes, circuits, etc., can solve the problems of metal fibers without electrochemical properties, small active materials, easy to fall off, etc., to achieve excellent electrochemical properties, Good mechanical properties, avoid the effect of easy falling off

Active Publication Date: 2017-09-19
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current research is to load the active materials on flexible substrates such as metal wires and carbon fibers through post-processing, but there are two practical problems: (1) The mass of active materials loaded on the substrate is too small, resulting in the preparation of fiber batteries. Satisfying large-capacity storage, the current specific capacity of flexible batteries is mostly given per gram of active material, which is not suitable for characterizing the actual application performance of the battery. The specific capacity that truly reflects

Method used

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  • Flexible cell based on metallic oxide/graphene composite macroscopic fibers and preparation method
  • Flexible cell based on metallic oxide/graphene composite macroscopic fibers and preparation method
  • Flexible cell based on metallic oxide/graphene composite macroscopic fibers and preparation method

Examples

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Example Embodiment

[0032] Example one

[0033] 4mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 3.9mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 0.6% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4). The nascent fiber is obtained by spinning at 5 mL / min. The nascent fiber is stretched orientated at a drawing speed of 2 times, washed with ultrapure water three times, and dried at 28°C for 24 hours to obtain Metal oxide and graphene oxide composite fiber. The composite fiber was soaked in 57% hydroiodic acid for 4.5 hours at a temperature of 90 degrees, and then taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite macroscopic fiber. .

[0034] Attached figure 1 a is a macro-fiber optical photo of metal oxide and graphene oxide composite, attached figure 1 b is an optical photo of a metal oxide and graph...

Example Embodiment

[0040] Example two

[0041] 2mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 2mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 1.5% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4). The nascent fiber is obtained by spinning at 0.1 mL / min. The nascent fiber is stretched and oriented at a stretching speed of 2 times, washed with ultrapure water three times, and dried at 28°C for 24 hours. The composite fiber of metal oxide and graphene oxide is obtained. The composite fiber was soaked and reduced in 57% hydroiodic acid at a temperature of 90 degrees for 4.5 hours, taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite fiber.

[0042] The composite fiber and the lithium wire are used as the positive electrode and the negative electrode, respectively, connected to the copper wire collector, and...

Example Embodiment

[0044] Example three

[0045] 4mg / mL Ti 0.87 O 2 0.52- The aqueous solution was mixed with the 3.9mg / mL graphene oxide aqueous solution and then added to the wet spinning equipment, and injected into the aqueous solution containing 0.6% chitosan (Ti 0.87 O 2 0.52- The mass ratio to graphene oxide is 4), and spun at 2mL / min to obtain nascent fibers. The nascent fiber is stretched orientated at a stretching speed of 2 times, washed with ultrapure water three times, and dried at 28° C. for 24 hours to obtain a metal oxide and graphene oxide composite fiber. The composite fiber was soaked and reduced in 57% hydroiodic acid at 70 degrees for 4.5 hours, taken out, washed repeatedly with ultrapure water and ethanol, and dried in the air to obtain a metal oxide and graphene composite fiber.

[0046] The composite fiber and the lithium wire are used as the positive electrode and the negative electrode, respectively, connected to the copper wire collector, and then placed in a heat shrinkabl...

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Abstract

The invention relates to a flexible cell based on metallic oxide/graphene composite macroscopic fibers and a preparation method. The preparation method comprises the following steps: after mixing an anionic metal oxide aqueous solution with graphene oxide to obtain a spinning solution, adding the spinning solution in wet spinning equipment to obtain nascent fibers; repeatedly washing the obtained nascent fibers with deionized water, and drying the nascent fibers to obtain metallic oxide and graphene oxide composite fibers; reducing the metallic oxide and graphene oxide composite fibers with hydroiodic acid, and then washing and drying the metallic oxide and graphene oxide composite fibers to obtain the metallic oxide and graphene composite fibers; placing the composite fibers, lithium lines and lithium manganate loaded carbon cloth fibers in a shrinkable tube in parallel; and adding diaphragms and electrolyte so that half cells and total cells can be assembled respectively. The preparation process is simple and controllable, and large-scale production is facilitated. The metallic oxide and graphene composite fibers which are prepared by the preparation method for the first time have unlimited prospects in the field of energy storage of flexible cells.

Description

technical field [0001] The invention relates to a fiber used in flexible battery technology, in particular to a flexible battery based on metal oxide / graphene composite macroscopic fibers and a preparation method. Background technique [0002] With the growing market of portable and wearable electronic devices in recent years, wearable devices including Google glasses and Apple Watches have attracted widespread attention. Flexible batteries have become an important part of the development of wearable devices because they do not have high energy density and long cycle life. Compared with traditional batteries, the advantages of flexible batteries are that they are lighter, highly flexible, and can even be woven into fabrics. [0003] The development of fibrous flexible batteries is currently a promising approach. However, most of the current research is to load the active materials on flexible substrates such as metal wires and carbon fibers through post-processing, but ther...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/36H01M4/48H01M4/583H01M10/04
CPCH01M4/131H01M4/133H01M4/1391H01M4/1393H01M4/362H01M4/48H01M4/583H01M10/04Y02E60/10Y02P70/50
Inventor 耿凤霞
Owner SUZHOU UNIV
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