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Lithium-based micro battery with high surface capacity and preparation method and application thereof

A lithium-based micro-battery and micro-battery technology, which is applied in the manufacture of lithium batteries, electrolyte batteries, battery electrodes, etc., can solve problems such as low theoretical capacity, complex and harsh preparation methods, and obstacles to the large-area application of high-area-capacity micro-batteries. apply significant effects

Inactive Publication Date: 2019-05-28
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current micro-lithium-ion batteries, due to their low theoretical capacity and complex and harsh preparation methods, seriously hinder the demand for large-area applications of high-area capacity micro-batteries.

Method used

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  • Lithium-based micro battery with high surface capacity and preparation method and application thereof
  • Lithium-based micro battery with high surface capacity and preparation method and application thereof
  • Lithium-based micro battery with high surface capacity and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0036] The embodiment of the present invention provides a kind of preparation method of high areal capacity lithium-based micro-battery, its production process is as follows figure 1 As shown, it specifically includes the following steps:

[0037] (1) By cutting the graphene film into the desired interdigitated electrode shape, the single electrode width is 300 microns;

[0038] (2) the graphene thin film of interdigitated electrode shape gained in step (1) is compounded with lithium metal, as the negative pole of microbattery, electrode thickness is 100 microns;

[0039] (3) The composite electrode obtained in step (2) is assembled into a lithium-lithium symmetric battery, and an electrochemical test is carried out at a current of 0.2 milliampere / square centimeter and an area capacity of 0.2 milliampere hours / square centimeter, and the results are as follows image 3 As shown, the symmetrical battery has a long cycle stability performance of up to 1200 hours;

[0040] (4) T...

Embodiment 2

[0046] The embodiment of the present invention provides a method for preparing a lithium-based micro-battery with high areal capacity, which specifically includes the following steps:

[0047] (1) By cutting the graphene film into the required interdigitated electrode shape, the width of a single electrode is 300 microns;

[0048] (2) the graphene thin film of interdigitated electrode shape gained in step (1) is compounded with lithium metal, as the negative pole of microbattery, electrode thickness is 100 microns;

[0049] (3) Lithium iron phosphate material slurry is coated on the graphene film of the interdigitated electrode shape of step (1) gained, as microbattery positive electrode, thickness is 300 microns;

[0050] (4) Pairing and assembling the microelectrodes prepared in step (2) and step (3), injecting electrolyte, and packaging.

Embodiment 3

[0052] The embodiment of the present invention provides a method for preparing a lithium-based micro-battery with high areal capacity, which specifically includes the following steps:

[0053] (1) By cutting the graphene film into the desired interdigitated electrode shape; the width of a single electrode is 300 microns;

[0054] (2) the graphene thin film of interdigitated electrode shape gained in step (1) is compounded with lithium metal, as the negative pole of microbattery, electrode thickness is 100 microns;

[0055] (3) Lithium iron phosphate material slurry is coated on the graphene film of the interdigitated electrode shape of step (1) gained, as microbattery anode, thickness is 10 microns;

[0056] (4) Pairing and assembling the microelectrodes prepared in step (2) and step (3), injecting electrolyte, and packaging.

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Abstract

The invention discloses a lithium-based micro battery with high surface capacity and a preparation method and an application thereof. The active material of the negative electrode of the micro batteryis composed of metal lithium and a composite component acting as structural support. The positive material of the micro battery includes one or more of lithium cobaltate, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphate, vanadium oxide and sulfur with high surface capacity. The surface capacity of the lithium-based micro battery is 0.1-2000mAh / cm<2>, and can work normally at the charge-discharge ratio of 0.01-10mA / cm<2>. The negative electrode of the lithium-based micro battery with high surface capacity provided by the invention has a smoothsurface without obvious dendrite after repeated charging and discharging. A micro battery prepared by using the negative electrode and a positive electrode together can be widely used in the power supplies of mobile electronic devices such as mobile phones, tablet computers, notebooks, wearable electronic devices, intelligent robots and of aircrafts, and has significant practical applications.

Description

technical field [0001] The invention belongs to the technical field of preparation of lithium batteries, and relates to a lithium-based micro-battery with high surface capacity and a preparation method and application thereof. Background technique [0002] As the demand for miniaturization of mobile electronic devices such as the Internet of Things, smart robots, biochips, and wearable electronics continues, the development of tiny batteries with high areal capacity has become imminent. However, the current micro-lithium-ion batteries, due to their low theoretical capacity and complex and harsh preparation methods, seriously hinder the demand for large-area applications of high-area-capacity micro-batteries. There is an urgent need to develop commercial microbatteries with high areal capacity. [0003] As one of the most widely used and promising batteries in the world today, metal lithium batteries have the advantages of high specific energy, high discharge performance and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395H01M4/13H01M4/131H01M4/136H01M4/139H01M4/1391H01M4/1397H01M10/052H01M10/058H01M12/08
CPCY02E60/10Y02P70/50
Inventor 杨树斌李彬沈锴
Owner BEIHANG UNIV