Method for preparing liquid metal nano-particles and method for preparing lithium ion batteries
A lithium-ion battery and liquid metal technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor conductivity, low energy density, and poor performance of large rate of electrode materials, and achieve improved conductivity and high energy density. , Increase the effect of cycle life and stability
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[0028] A preparation method of liquid metal nanoparticles, comprising the following steps:
[0029] Step S1: mixing liquid metal alloy (LM), ethanol solution and dodecanethiol to form a mixture I, and ultrasonically degrading the mixture I;
[0030] Step S2: The mixture I was left to stand for 2h-4h, then filtered and dried to obtain liquid metal nanoparticles. The physical picture of liquid metal nanoparticles figure 2 shown.
[0031] Further: the preparation method of the liquid metal alloy described in the step S1 is:
[0032] Step S11: weighing molten metal Ga and molten metal Sn in a beaker with a mass ratio of 22:3;
[0033] Step S12: stirring the metal Ga and the metal Sn in the beaker for 1.5h-2.5h, and after cooling down to room temperature, a liquid metal alloy is obtained. The physical picture of the liquid metal alloy figure 1 shown.
[0034] Further: the specific implementation of the sonication in the step S1 is as follows: taking the ultrasonic wave to ac...
Embodiment 1
[0042] Example 1. Metal Ga and metal Sn were melted at a high temperature of 300°C, and the molten metal Ga and metal Sn were weighed in a beaker according to a mass ratio of 22:3, and stirred gently for 2 hours under an argon atmosphere. After cooling to room temperature, a liquid metal alloy is obtained;
[0043] Weigh 0.18g liquid metal alloy, add 0.75mL ethanol solution, and add 0.2024g dodecanethiol as a surfactant at the same time to form a mixture I, carry out ultrasonic degradation to the mixture I, and rest for ten minutes every two minutes with ultrasonic waves. Once every minute, repeat fifteen times; then stand still for 3 hours, filter, and dry at 50°C to obtain liquid metal nanoparticles;
[0044] Weigh commercial sulfur, liquid metal nanoparticles, acetylene black and PVDF at a mass ratio of 8:2:1:1 to make positive plates, use lithium plates as counter electrodes, use electrolyte salts and organic solvents as electrolytes, and use Celgard2400 as separators In ...
Embodiment 2
[0046] Example 2. Metal Ga and metal Sn were melted at a high temperature of 300°C, and the molten metal Ga and metal Sn were weighed in a beaker according to a mass ratio of 22:3, and stirred gently for 2 hours under an argon atmosphere. After cooling to room temperature, a liquid metal alloy is obtained;
[0047] Weigh 0.18g liquid metal alloy, add 0.75mL ethanol solution, and add 0.2024g dodecanethiol as a surfactant at the same time to form a mixture I, carry out ultrasonic degradation to the mixture I, and rest for ten minutes every two minutes with ultrasonic waves. Once every minute, repeat fifteen times; then stand still for 3 hours, filter, and dry at 50°C to obtain liquid metal nanoparticles;
[0048] Weigh commercial lithium titanate, liquid metal nanoparticles, acetylene black, and PVDF at a mass ratio of 8:2:1:1 to make negative electrodes, use lithium sheets as counter electrodes, use electrolyte salts and organic solvents as electrolytes, and use Celgard 2400 i...
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