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Integrated stretchable lithium ion battery and preparation method thereof

A lithium-ion battery and battery technology, applied in the direction of battery electrodes, secondary batteries, electrode carriers/collectors, etc., can solve the problems of limited application, large size of LIB, etc., achieve excellent adhesion, improve conductivity, and meet the range The effect of restriction

Inactive Publication Date: 2020-07-31
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the volume of LIB is relatively large due to the three-dimensional arched structure, which limits its application in future electronics.
[0004] Despite the great efforts of many researchers in the study of stretchable LIBs, there is still huge room for researchers to develop fully stretchable LIBs

Method used

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  • Integrated stretchable lithium ion battery and preparation method thereof
  • Integrated stretchable lithium ion battery and preparation method thereof
  • Integrated stretchable lithium ion battery and preparation method thereof

Examples

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Embodiment 1

[0063] The invention provides an integrated stretchable lithium ion battery and a preparation method thereof.

[0064] Synthesis of coaxial Si@C Hybrid Fibers (Si@C Hybrid Fibers, abbreviated as Si@C HFs) materials:

[0065] 0.1 g of 10 nanometer Si NPs (nano-particles) and 0.6 g of poly(methyl methoxyethyl ester) (PMMA, weight average molecular weight M w =996,000) powder was dissolved in a mixture solution of DMF and acetone in a 1:1 wt. ratio, which was used as a core solution. 0.5 g of poly(acrylamide) (PAN, M w =150,000) was dissolved in 5 g of DMF, and this solution was used as the shell solution. The above two solutions were first treated by sonication for 30 minutes, followed by vigorous magnetic stirring for 12 hours. The core and shell solutions were transferred separately into a 5 mL plastic syringe. The needle of the syringe has an inner diameter of 0.6 mm and an outer diameter of 0.3 mm. During the coaxial electrospinning process, the voltage was 10kV to form...

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Abstract

The invention provides an integrated stretchable lithium ion battery, which comprises an electrolyte, an anode, a cathode and a diaphragm, wherein the diaphragm is clamped between the anode and the cathode, the material of the anode comprises a coaxial Si@C hybrid fiber synthesized by a coaxial electrostatic spinning process, the hybrid fiber has a core-shell tubular structure, the core comprisesSi, and the shell comprises C. According to the invention, electrode slurry is uniformly sprayed on a stretchable current collector by adopting electrostatic spinning, so that the battery slurry and the current collector have excellent adhesiveness, and the problem of material falling in the stretching process can be effectively reduced; and the carbon-coated silicon negative electrode material ismanufactured through coaxial spinning, and a tubular core-shell structure is formed, so that the mechanical property of the material is improved while capacity irreversible attenuation caused by volume expansion of a traditional silicon negative electrode material is reduced.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an integrated stretchable lithium-ion battery and a preparation method thereof. Background technique [0002] Flexible electronics have attracted much attention due to their potential applications in several emerging fields, such as strain sensors, wearable electronics, and artificial electronic skin. Stretchable electronics are becoming increasingly important due to the growing demand for fully elastic electronics capable of withstanding high strains. Since highly reliable stretchable electronic devices should be stretchable in all their components, a key challenge in developing such devices is to create stretchable energy devices to power them. Lithium ion batteries (LIBs) are one of the most promising candidates to provide power sources for stretchable electronics due to the high energy density and good long-term stability of LIBs. However, several key obstacles exist in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/13H01M4/139H01M4/36H01M4/38H01M4/587H01M4/62H01M4/66H01M10/0525
CPCH01M4/13H01M4/139H01M4/364H01M4/386H01M4/587H01M4/62H01M4/661H01M4/666H01M10/0525H01M2004/028Y02E60/10
Inventor 王荣明王晓丹路瑶
Owner UNIV OF SCI & TECH BEIJING
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