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Preparation method and application of micronized cellulose/MXene composite film

A composite film and cellulose technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor mechanical properties and capacitance of MXene composite films, and achieve enhanced mechanical properties, comprehensive performance, and tensile strength. The effect of increasing strength

Active Publication Date: 2021-01-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the mechanical properties and capacitance of the existing MXene composite film are poor, and the conductivity of the MXene cellulose composite film shows a linear decrease trend with the increase of nanocellulose, and provide an independently supported micronization Preparation method of cellulose / MXene composite film

Method used

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  • Preparation method and application of micronized cellulose/MXene composite film
  • Preparation method and application of micronized cellulose/MXene composite film
  • Preparation method and application of micronized cellulose/MXene composite film

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specific Embodiment approach 1

[0028] Embodiment 1: This embodiment is a preparation method of an independently supported micronized cellulose / MXene composite film, which is completed in the following steps:

[0029] 1. Preparation of dark green few-layer Ti 3 C 2 T x Colloidal supernatant:

[0030] ①. Add LiF to the HCl solution, stir at room temperature until completely dissolved, and then add Ti in an ice-water bath 3 AlC 2 , and then reacted for 18h to 28h in a nitrogen atmosphere and at a temperature of 30°C to 35°C to obtain a reaction solution;

[0031] ②. First, use deionized water as a cleaning agent, and centrifuge the reaction solution at a centrifugal speed of 3500r / min to 4000r / min to pH>6, pour out the supernatant to obtain a precipitate; add deionized to the precipitate water,

[0032] Then perform ultrasonication, centrifuge at a centrifugal speed of 3500r / min to 4000r / min for 1h to 1.2h, collect the supernatant, and obtain dark green few-layer Ti 3 C 2 T x colloidal supernatant;

...

specific Embodiment approach 2

[0038] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the concentration of the HCl solution in step ① is 8 mol / L-10 mol / L. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0039] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the mass of LiF described in Step ① to the HCl solution is (1g-2g):20mL. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method and an application of a micronized cellulose / MXene composite film, and relates to the preparation method and the application of the MXene composite film. The invention aims at solving problems that a mechanical property and a capacitive property of the existing MXene composite film are poor, and the conductivity of the MXene cellulose composite film hasa linear reduction trend along with the increase of nanocellulose. The method comprises the following steps: 1, preparing a dark green few-layer Ti3C2Tx colloid supernatant; 2, preparing an MFC@Ti3C2Tx microgel; and 3, carrying out vacuum filtration on the MFC@Ti3C2Tx microgel through a mixed cellulose membrane with a pore diameter of 0.22 mum, and drying at a room temperature to obtain the independently supported micronized cellulose / MXene composite film. The independently supported micronized cellulose / MXene composite film is used as a negative electrode material of a capacitor. According to the invention, the micronized cellulose / MXene composite film can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of an MXene composite film. Background technique [0002] Ti 3 C 2 T x As a new electrode material for supercapacitors, it has attracted widespread attention due to its strong hydrophilicity, high electrical conductivity, and high theoretical capacity. It has been reported that Ti with a thickness of about 3 μm 3 C 2 T x The tensile strength of the film is 22MPa, the Young's modulus can reach 3.52GPa, and the tensile elongation is about 1%. due to Ti 3 C 2 T x The surface contains a large number of negatively charged -OH, -F, -O groups, so it can form bonds with organic polymers through hydrogen bonds. By compounding with polymers, not only its plasticity can be improved, but also its tensile strength can be greatly improved. However, the conductivity of most cellulose composite films shows a linear decrease trend with the increase of nanocellulose, which will lead to a decrease i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24
CPCH01G11/86H01G11/30H01G11/24
Inventor 姚忠平张志荣姜兆华
Owner HARBIN INST OF TECH
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