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A flexible all-solid planar interdigital lithium ion capacitor and a preparation method thereof

An all-solid-state, lithium-ion technology, applied in the manufacture of hybrid/electric double layer capacitors, capacitors, electrolytic capacitors, etc., can solve the problems that planar interdigitated lithium-ion capacitors have not been developed, and achieve high safety effects

Active Publication Date: 2018-12-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But planar interdigitated lithium-ion capacitors have not been developed

Method used

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  • A flexible all-solid planar interdigital lithium ion capacitor and a preparation method thereof

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Embodiment 1

[0034] Electrochemical exfoliation of graphene dispersed in ethanol (0.1 mg mL -1 ), lithium titanate dispersed in ethanol (0.5mg mL -1 ) and activated carbon (0.25 mg mL) dispersed in ethanol -1 ) as the raw material, this example ( figure 1 ) The finger length of the interdigitated mask plate is 15mm, the width is 1mm, and the finger spacing is 0.5mm; the filter membrane is an organic filter membrane (0.05μm). First suction filter a layer of graphene current collector with a thickness of about 2 μm; then suction filter lithium titanate / ethanol dispersion (negative electrode) and activated carbon / ethanol dispersion (positive electrode) with thicknesses of about 2 μm and 7 μm respectively. Coating lithium hexafluorophosphate / ethyl carbonate / (polyvinylidene fluoride-hexafluoropropylene) copolymer, and then packaging; a flexible all-solid planar interdigitated lithium ion capacitor is obtained.

[0035] The obtained flexible all-solid-state planar interdigitated lithium-ion c...

Embodiment 2

[0037] Electrochemically exfoliated graphene (0.2 mg mL) dispersed in isopropanol -1 ), niobium pentoxide (0.25 mg mL) dispersed in isopropanol -1 ) and activated graphene dispersed in isopropanol (0.25mg mL -1 ) as the raw material, the finger length of the interdigitated mask plate in the present embodiment is 10mm, the width is 2mm, and the finger spacing is 0.5mm; the filter membrane is a nylon filter membrane (0.02 μm). First suction filter a layer of graphene current collector, the thickness of which is about 3 μm; are about 1 μm and 5 μm. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) / N-butyl-N-methylpyrrolidine bis(trifluoromethanesulfonyl)imide (P 14 TFSI) / (polyvinylidene fluoride-hexafluoropropylene) copolymer (PVDF-HFP), and then packaged; that is, a flexible all-solid planar interdigitated lithium-ion capacitor is obtained.

[0038] The obtained flexible all-solid-state planar interdigitated lithium-ion capacitor can work stably at a voltage window of 3V, ...

Embodiment 3

[0040] Carbon nanotubes (0.05 mg mL) dispersed in N,N-dimethylformamide (DMF) -1 ), lithium titanate (2mg mL) dispersed in N,N-dimethylformamide -1 ) and activated graphene dispersed in N,N-dimethylformamide (1mg mL -1) as the raw material, the finger length of the interdigitated mask plate in the present embodiment is 15mm, the width is 1mm, and the finger spacing is 2mm; the filter membrane is a nylon filter membrane (0.1 μm). First, filter a layer of carbon nanotube current collector with a thickness of about 1 μm; then filter lithium titanate / N,N-dimethylformamide dispersion (negative electrode) and activated carbon / N,N-dimethylformamide respectively The amide dispersion (positive electrode) has a thickness of about 1.5 μm and 5 μm, respectively. Lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) / N-butyl-N-methylpyrrolidine bis(trifluoromethanesulfonyl)imide (P 14 TFSI) / (polyvinylidene fluoride-hexafluoropropylene) copolymer (PVDF-HFP), and then packaged; that is, a fl...

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Abstract

The invention provides a flexible all-solid planar interdigital lithium ion capacitor and a preparation method thereof. A lithium ion capacitor is composed of a current collector layer, a battery material finger electrode and a double-electric layer material finger electrode and is coated with a gel electrolyte to obtain a planar interdigitated lithium ion capacitor. The preparation method comprises the follow steps: on a flexible filter membrane substrate, by means of assistance of an interdigital mask plate, a conductive layer is subjected to suction filtration to form a current collector, and then negative (positive) and positive (negative) fingers are respectively manufactured by performing suction filtration of the battery material and the double-electric layer material on the currentcollector, and then the gel electrolyte is coated, and a flexible all-solid planar interdigital lithium ion capacitor is obtained after packaging. The flexible all-solid planar interdigital lithium ion capacitor manufactured by the invention can realize size controllability and large-scale production, and has wide market application prospects.

Description

technical field [0001] The invention belongs to the manufacturing field of lithium ion capacitors, in particular to a flexible all-solid planar interdigitated lithium ion capacitor and a preparation method thereof. Background technique [0002] The current configuration of lithium-ion capacitors is the traditional stacked type, that is, stacked in the form of current collector / positive electrode / diaphragm / negative electrode / collector. The structural form of the stacked lithium-ion capacitor of this structure involves two substrates, the current collector and the electrode material are not integrated, and at least 4 interfaces, resulting in a large volume of the stacked lithium-ion capacitor, which is not conducive to its small size. Application in integrated circuits and seamless access to integrated circuits. Moreover, the electrolyte used in stacked lithium-ion capacitors is an organic liquid electrolyte, which has safety problems such as leakage, fire, and explosion duri...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/84H01G11/56
CPCH01G11/06H01G11/56H01G11/84Y02E60/13
Inventor 吴忠帅包信和郑双好
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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