Method for preparing carbon/lithium sulfide positive electrode composite material from industrial-grade butyl lithium
A technology of composite materials and lithium sulfide, applied in nanotechnology for materials and surface science, alkali metal sulfide/polysulfide, nano-carbon, etc., can solve problems such as poor safety performance and poor cycle performance, and achieve The effect of low cost, small primary particles and high conductivity
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Embodiment 1
[0027] Step A (solution mixing): Under inert gas conditions, 500ml of industrial grade n-butyllithium solution (2.5mol / L) and 1.5L of n-hexane were thoroughly mixed to obtain a mixed solution, and the resulting mixed solution was put into a closed container.
[0028] Step B (gas-liquid reaction): under airtight conditions, the temperature is 25 ° C, first H 2 S gas is passed into the gas washing bottle through the submerged tube at a certain rate (10.5L / h), and then into the mixed solution through the submerged tube, and is stirred continuously to allow it to react for 6 hours until the entire slurry is pseudo-thick. A reaction slurry was obtained.
[0029] Step C (vacuum drying): put the obtained lithium sulfide reaction slurry into a vacuum drying oven at 205° C. for 2 hours, and finally obtain dried lithium sulfide.
[0030] Step D (heat treatment): Put the vacuum-dried lithium sulfide into a vacuum stainless steel airtight device, put the device into a 400°C atmosphere fu...
Embodiment 2
[0032] Step A (solution mixing): Under inert gas conditions, 500ml of industrial grade n-butyllithium solution (2.5mol / L) and 2L of n-hexane were thoroughly mixed to obtain a mixed solution, and the resulting mixed solution was put into a closed container.
[0033] Step B (gas-liquid reaction): under airtight conditions, the temperature is 30 ° C, first H 2 S gas is passed into the gas washing bottle through the submerged tube at a certain rate (10.5L / h), and then into the mixed solution through the submerged tube, and is stirred continuously for 5 hours until the whole slurry is pseudo-thick. A reaction slurry was obtained.
[0034] Step C (vacuum drying): put the obtained lithium sulfide reaction slurry into a vacuum drying oven at 205° C. for 2 hours, and finally obtain dried lithium sulfide.
[0035] Step D (heat treatment): Put the vacuum-dried lithium sulfide into a vacuum stainless steel airtight device, put the device into a 450°C atmosphere furnace after pumping, kee...
Embodiment 3
[0037] Step A (solution mixing): Under inert gas conditions, 500ml of industrial-grade n-butyllithium solution (2.5mol / L) and 2.5L of n-hexane were thoroughly mixed to obtain a mixed solution, and the resulting mixed solution was placed in a closed container.
[0038] Step B (gas-liquid reaction): under airtight conditions, the temperature is 30 ° C, first H 2 S gas is passed into the gas washing bottle through the submerged tube at a certain rate (10.5L / h), and then into the mixed solution through the submerged tube, and is stirred continuously to allow it to react for 4 hours until the entire slurry is pseudo-thick. A reaction slurry was obtained.
[0039] Step C (vacuum drying): put the obtained lithium sulfide reaction slurry into a vacuum drying oven at 205° C. for 2 hours, and finally obtain dried lithium sulfide.
[0040] Step D (heat treatment): Put the vacuum-dried lithium sulfide into a vacuum stainless steel airtight device, put the device into a 500°C atmosphere fur...
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