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Flexible positive electrode of lithium-ion battery, preparation method of flexible positive electrode and super-flexible lithium-ion all-battery

A lithium-ion battery and positive electrode technology, applied in the field of inorganic functional material preparation, can solve the problems affecting the electrochemical performance and mechanical performance of the battery, reduce the utilization rate of active materials, etc., and achieve the effects of avoiding brittle fracture, promoting development, and single control parameters

Inactive Publication Date: 2016-12-07
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these methods can obtain integral electrode materials while avoiding the use of binders, these active materials are only randomly embedded in the conductive network, and cannot maintain good contact with the skeleton during deformation, which reduces the utilization of active materials. The stress of the particles cannot be transferred to the flexible framework, which affects the electrochemical and mechanical properties of the battery during deformation

Method used

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  • Flexible positive electrode of lithium-ion battery, preparation method of flexible positive electrode and super-flexible lithium-ion all-battery
  • Flexible positive electrode of lithium-ion battery, preparation method of flexible positive electrode and super-flexible lithium-ion all-battery
  • Flexible positive electrode of lithium-ion battery, preparation method of flexible positive electrode and super-flexible lithium-ion all-battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Sample preparation: The commercially obtained flexible carbon nanotube film (the original carbon nanotube scanning electron microscope image is shown in image 3 shown) placed in a tube furnace, heated to 1000°C under the protection of argon, with a heating rate of 10°C / min, and kept for 2 hours to remove organic impurities on the surface of carbon nanotubes. Measure 4mL of concentrated hydrochloric acid and 50mL of deionized water, mix and stir, and prepare 1mol / L dilute hydrochloric acid for later use. Metal Ni sheet (1×2cm 2 ) and carbon nanotube paper (1×1cm 2 ) were soaked in dilute hydrochloric acid and acetone for 15 minutes, then taken out, rinsed with deionized water, and dried in an oven at 50°C for later use.

[0052] 1) Electroplating precursor

[0053] Prepare an aqueous solution with a concentration of 0.01M manganese sulfate, 0.1M sodium sulfate and 0.1M sodium acetate as the electroplating solution (300). The carbon nanotube film is used as the workin...

Embodiment 2

[0064] The preparation of the sample in the ultra-flexible Li-ion of this example is similar to Example 1. First, place the carbon nanotube film in a tube furnace and heat it to 1000°C to remove the organic matter on the surface, then soak the metal Ni sheet and the treated carbon nanotube paper in dilute hydrochloric acid and acetone respectively, and use deionized Wash it with water and place it in an oven at 70°C to dry it for later use.

[0065] 1) Preparation of electroplating precursor

[0066] Prepare an aqueous solution with a concentration of 3 M manganese sulfate, 0.1 M sodium sulfate and 0.1 M sodium acetate as the electroplating solution. The carbon nanotube film is used as the working electrode (100) and the metal nickel sheet is used as the counter electrode (200) for electrochemical deposition, and a constant voltage is applied to the working electrode for electrochemical deposition. The voltage can be between 0.75 and 1.4 V. The deposition The typical time is...

Embodiment 3

[0075] The preparation of the sample in the ultra-flexible lithium ion of this embodiment is similar to that of Examples 1 and 2. First, place the carbon nanotube film in a tube furnace and heat it to 1000°C to remove the organic matter on the surface, then soak the metal Ni sheet and the treated carbon nanotube paper in dilute hydrochloric acid and acetone respectively, and use deionized Wash it with water and place it in an oven at 70°C to dry it for later use.

[0076] 1) Preparation of electroplating precursor

[0077] Prepare an aqueous solution with a concentration of 1 M manganese sulfate, 1 M sodium sulfate and 1 M sodium acetate as the electroplating solution.

[0078] Electrochemical deposition is performed by using the carbon nanotube film as the working electrode (100), the metal nickel sheet as the counter electrode (200), and the silver / silver chloride as the reference electrode (350). Apply a current density of 6.5 mA / cm on the working electrode (100) 2 Elect...

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Abstract

The invention provides a flexible positive electrode of a lithium-ion battery, a preparation method of the flexible positive electrode and a super-flexible lithium-ion all-battery. The flexible positive electrode of the lithium-ion battery is an integrated monolithic electrode formed by a positive electrode material lithium manganate (650) of the lithium-ion battery and a flexible skeleton (150). The preparation method of the flexible positive electrode comprises the following two steps of (1) selecting the flexible skeleton and depositing an oxygen manganese hydroxide material on the flexible skeleton in an electroplating manner; and (2) carrying out lithiation treatment on the electrodeposited oxygen manganese hydroxide material in a low-melting-point fused salt containing lithium ions to form the positive electrode material lithium manganate of the lithium-ion battery growing on the flexible skeleton in a conformal (conformal) manner. The flexible positive electrode of the lithium-ion battery has the technical effect that a three-dimensional flexible network or a bracket is utilized as a substrate, so that the flexible substrate can accept large deformation in the bending process.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic functional materials, and in particular relates to a flexible positive electrode of a lithium ion battery, a preparation method thereof and an ultra-flexible lithium ion full battery. Background technique [0002] With the advancement of smart technology, various flexible devices have also become the main force in the electronics market. Current flexible devices mainly include flexible displays, radio frequency cards, smart wearable products, and sensors. However, the slow development of flexible battery technology has become a restrictive factor for the development of high-end flexible electronic devices. Most of the existing conventional batteries have shortcomings in terms of rigidity and thickness, which limit their use in the field of flexible thin-film devices. Therefore, there is an urgent need to develop an ultra-flexible lithium-ion full battery. [0003] The battery is mainly c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/131H01M4/66H01M4/1391H01M10/0525
CPCH01M4/131H01M4/1391H01M4/663H01M10/0525Y02E60/10
Inventor 王建马子涵张会刚
Owner NANJING UNIV
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