Conductive ternary composite material as well as preparation method and application thereof
A technology of composite materials and negative electrode materials, which is applied in the field of inorganic hybrid functional materials, can solve the problems of unsatisfactory battery specific capacity, poor electronic conduction ability, and large volume change of battery cycle stability, so as to improve cycle stability It is beneficial to fully infiltrate and relieve the effect of volume deformation.
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Embodiment 1
[0031] A preparation method of a conductive ternary composite material, specifically comprising the following steps:
[0032] (1) Prepare 25mg·mL -1 FeCl 3 Aqueous solution, add BC hydrogel with a thickness of 1.5mm and a length and width of 15mm into the prepared FeCl 3 In the aqueous solution, stand in a refrigerator at 4°C for 24 hours;
[0033] (2) will fully infiltrate FeCl 3 The BC hydrogel was taken out and directly put into 1000mL of deionized water with a water temperature of 60°C for in-situ hydrolysis reaction. During the hydrolysis process, fresh deionized water was replaced every 20 minutes until the deionized water was completely colorless and transparent. Without adding any other reagents, the iron-containing active material precursor is deposited on the surface of BC nanofibers, and the hydrolyzed composite material is obtained after the reaction is completed;
[0034] (3) Freeze-dry the prepared hydrolyzed composite hydrogel to obtain the corresponding air...
Embodiment 2
[0042] A preparation method of a conductive ternary composite material, specifically comprising the following steps:
[0043] (1) Prepare 35mg·mL -1 FeCl 3 Aqueous solution, add BC hydrogel with a thickness of 3.0mm and a length and width of 15mm into the prepared FeCl 3 In the aqueous solution, stand in a refrigerator at 4°C for 48 hours;
[0044] (2) will fully infiltrate FeCl 3 The BC hydrogel was taken out and directly put into 1000mL of deionized water at a temperature of 70°C for in-situ hydrolysis reaction. During the hydrolysis process, fresh deionized water was replaced every 20 minutes until the deionized water was completely colorless and transparent. Without adding any other reagents, the iron-containing active material precursor is deposited on the surface of BC nanofibers, and the hydrolyzed composite material is obtained after the reaction is completed;
[0045] (3) Freeze-dry the prepared hydrolyzed composite hydrogel to obtain the corresponding airgel; the...
Embodiment 3
[0052] A preparation method of a conductive ternary composite material, specifically comprising the following steps:
[0053] (1) Prepare 50mg·mL -1 FeCl 3 Aqueous solution, add BC hydrogel with a thickness of 3.0mm and a length and width of 15mm into the prepared FeCl 3 In the aqueous solution, stand in a refrigerator at 4°C for 48 hours;
[0054] (2) will fully infiltrate FeCl 3 The BC hydrogel was taken out, and directly put into 1000mL deionized water with a water temperature of 80°C for in-situ hydrolysis reaction. During the hydrolysis process, fresh deionized water was replaced every 20 minutes until the deionized water was completely colorless and transparent. Without adding any other reagents, the iron-containing active material precursor is deposited on the surface of BC nanofibers, and the hydrolyzed composite material is obtained after the reaction is completed;
[0055] (3) Freeze-dry the prepared hydrolyzed composite hydrogel to obtain the corresponding airge...
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