Soybean protein-based double-crosslinking self-healing supermolecular sulfur positive electrode aqueous binder, and preparation method and application thereof
A water-based binder, soybean protein technology, applied in positive electrodes, battery electrodes, structural parts, etc., can solve the problems of limiting the volume expansion of active material sulfur, poor bonding performance, etc., to prevent shedding, ensure electron conduction, and effectively The effect of electron conduction
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Embodiment 1
[0068] The preparation method of soybean protein-based double cross-linking self-healing supramolecular sulfur cathode water-based binder comprises the following steps:
[0069] (1) Take 10 g of soybean protein powder, disperse it in water, and stir it magnetically at 600 r / min for 5 hours to obtain a uniform soybean protein aqueous solution with a mass fraction of 10 wt%.
[0070] (2) Add an aqueous sodium hydroxide solution with a mass fraction of 10 wt% to the aqueous solution obtained in step (1), adjust the pH of the aqueous soybean protein solution to 10.0, and obtain a pH-adjusted solution;
[0071] (3) Heating the pH-adjusted solution in step (2) to 70 ºC, stirring and hydrolyzing for 40 minutes, then cooling to room temperature, and then continuing to stir and react for 10 hours to obtain a hydrolyzed soybean protein aqueous solution;
[0072] (4) After centrifuging the hydrolyzed soybean protein aqueous solution obtained in step (3) at a speed of 8000 r / min for 10 mi...
Embodiment 2
[0085] The preparation method of soybean protein-based double cross-linking self-healing supramolecular sulfur cathode water-based binder comprises the following steps:
[0086] (1) Take 10 g of soybean protein powder, disperse it in water, and magnetically stir it at 600 r / min for 10 hours to obtain a uniform soybean protein aqueous solution with a mass fraction of 5 wt%.
[0087] (2) Add an aqueous sodium hydroxide solution with a mass fraction of 10 wt% to the aqueous solution obtained in step (1), adjust the pH of the aqueous soybean protein solution to 11.0, and obtain a pH-adjusted solution;
[0088] (3) Heating the pH-adjusted solution in step (2) to 80 ºC, stirring and hydrolyzing for 30 minutes, then cooling to room temperature, and then continuing to stir and react for 12 hours to obtain a hydrolyzed soybean protein aqueous solution;
[0089] (4) After centrifuging the hydrolyzed soybean protein aqueous solution obtained in step (3) at a speed of 8000 r / min for 10 mi...
Embodiment 3
[0102] The preparation method of soybean protein-based double cross-linking self-healing supramolecular sulfur cathode water-based binder comprises the following steps:
[0103] (1) Take 10 g of soybean protein powder, disperse it in water, and stir it magnetically at 600 r / min for 12 hours to obtain a uniform soybean protein aqueous solution with a mass fraction of 8 wt%.
[0104] (2) Add an aqueous sodium hydroxide solution with a mass fraction of 10 wt% to the aqueous solution obtained in step (1), adjust the pH of the aqueous soybean protein solution to 10.5, and obtain a pH-adjusted solution;
[0105] (3) Heating the pH-adjusted solution in step (2) to 90 ºC, stirring and hydrolyzing for 20 minutes, then cooling to room temperature, and then continuing to stir and react for 11 hours to obtain a hydrolyzed soybean protein aqueous solution;
[0106] (4) After centrifuging the hydrolyzed soybean protein aqueous solution obtained in step (3) at a speed of 8000 r / min for 10 mi...
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