Preparation method of ultra-large-size titanium carbide nanosheet with wrinkle structure and application of nanosheet in electrochemical energy storage

[0031] Example 1: Preparation of ultra-large titanium carbide nanosheets with pleated structure

[0032] Step 1: Ultra-thin Ti 3 C 2 Preparation of nanosheets

[0033] (1) Add 1 g LiF to 20 mL 9 M HCl, magnetically stir until LiF is completely dissolved;

[0034] (2) To prevent local overheating, slowly add 1 g Ti 3 AlC 2 ;

[0035] (3) Put the mixture in the reactor at 60 o React for 72 h under C;

[0036] (4) Centrifuge the product (3500 rpm / 5 min), wash 6 times with deionized water, wash 2 times with ethanol, and dry in vacuum;

[0037] (5) Weigh 0.1 g of the dried product, disperse it in 10 mL of deionized water, and sonicate it for 4 h at 600 W;

[0038] (6) Centrifuge the sonicated product (3500 rpm, 1 h), and the upper liquid is the desired substance.

[0039] figure 1 For ultra-thin Ti 3 C 2 SEM pictures of nanosheets, figure 2 For ultra-thin Ti 3 C 2 TEM picture of the nanosheet.

[0040] Step 2: Super large size Ti with fold structure 3 C 2 Preparation of nanosheets

[0041] (1) 1.

[0046] Embodiment 2: Ti 3 C 2 Preparation of flexible film electrode

[0047] The super-sized Ti with a corrugated structure 3 C 2 Nanosheets are uniformly dispersed by ultrasonic, and Ti is prepared by vacuum filtration technology 3 C 2 Thin-film electrode, and dried at room temperature for 6 h.

[0048] Figure 5 Ti 3 C 2 Front SEM photo of the flexible electrode, Image 6 Ti 3 C 2 SEM photo of the section of the flexible electrode.

[0049] Example 3: Ultra-thin Ti 3 C 2 Electrodes made of nanosheets and super-sized Ti with pleated structure 3 C 2 Cyclic Voltammetric Test of Electrodes Prepared by Nanosheets

[0050] 1. Working electrode: ultra-thin Ti 3 C 2 Electrode prepared by nanosheets (original size: 1.8 cm×0.8 cm; immersion size: 0.9 cm×0.8 cm, mass: 0.0035 g); reference electrode: Ag / AgCl; counter electrode: Pt sheet (1 cm×1 cm) ; Electrolyte: 0.5 MH 2 SO 4 ; CV potential window: -0.3 V~0.3 V; immerse the membrane electrode in the electrolyte, let it stand for 10 min, and activate it until the curve completely coincides with the scan rate of 100 mV / s;

[0051] 2. Working electrode: oversized Ti with corrugated structure 3 C 2 Electrodes prepared by nanosheets (original size: 1.8 cm×0.8 cm; immersion size: 0.9 cm×0.8 cm, mass: 0.0035 g); reference electrode: Ag / AgCl; counter electrode: Pt sheet (1cm×1 cm); Electrolyte: 0.5 MH 2 SO 4 ; CV potential window: -0.3 V~0.3 V. The membrane electrode was imme