Treatment method of stainless steel base material for film lithium battery
A technology of stainless steel and lithium batteries, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of limiting the development of thin-film lithium batteries and increasing battery costs, and achieve the effects of increasing film adhesion, increasing energy density, and reducing diffusion
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Embodiment 1
[0031] The 304 stainless steel substrate is rolled by a rolling mill, with a thickness of 50 microns and a roughness of less than 50 nm. Heat it to 300°C in a muffle furnace, keep it warm for 1 hour, and then cut it to 5cm*5cm.
[0032] Select the above-mentioned stainless steel base material and cut it to the required size, immerse it in acetone, ethanol and deionized water, respectively, ultrasonically clean it for 15 minutes, and finally dry it.
[0033] Immerse the cleaned stainless steel substrate in a mixed solution of copper sulfate and hydrochloric acid, the ratio is 4g:20mL:20mL, and the soaking time is 30s.
[0034] After cleaning, soak with 4% hydrochloric acid aqueous solution for 1min. Finally wash again and dry.
[0035] 1 μm thick lithium cobalt oxide (LiCoO 2 , LCO) positive electrode, after annealing at 700 ° C for 1 h, and then prepared 2 micron thick lithium phosphate nitride (LiPON) electrolyte by magnetron sputtering deposition, and prepared 1 micron th...
Embodiment 2
[0037] The 304 stainless steel substrate is rolled by a rolling mill, with a thickness of 90 microns and a roughness of less than 50 nm. Heat it to 400°C in a muffle furnace, keep it warm for 0.3h, and then cut it to 3cm*3cm.
[0038] Select the above-mentioned stainless steel base material and cut it to the required size, immerse it in acetone, ethanol and deionized water, respectively, ultrasonically clean it for 18 minutes, and finally dry it.
[0039] After cleaning, soak in 1% nitric acid alcohol solution for 2 minutes.
[0040] After cleaning, soak with 1% hydrochloric acid aqueous solution for 3 minutes. Finally wash again and dry.
[0041] 1 μm thick lithium cobalt oxide (LiCoO 2, LCO) positive electrode, after annealing at 700 °C for 1 h, and then prepared 2 micron thick lithium phosphate nitride (LiPON) electrolyte by magnetron sputtering deposition, and prepared 1 micron thick metal lithium (Li) negative electrode by thermal evaporation deposition . After assem...
Embodiment 3
[0043] The 304 stainless steel substrate is rolled by a rolling mill with a thickness of 20 microns and a roughness of less than 20 nm. Heat it to 250°C in a muffle furnace, keep it warm for 2 hours, and then cut it to 8cm*8cm.
[0044] Select the above-mentioned stainless steel base material and cut it to the required size, immerse it in acetone, ethanol and deionized water for ultrasonic cleaning respectively for 20 minutes, and finally dry it.
[0045] After cleaning, immerse in hydrochloric acid picric acid ethanol solution, the ratio is 5mL:1g:100mL, and the soaking time is 30s. After cleaning, soak with 0.5% hydrochloric acid aqueous solution for 10 minutes.
[0046] 4 μm thick lithium cobalt oxide (LiCoO 2 , LCO) positive electrode, after annealing at 700 ° C for 1 h, and then prepared 3 micron thick lithium phosphate nitride (LiPON) electrolyte by magnetron sputtering deposition, and prepared 1 micron thick metal lithium (Li) negative electrode by thermal evaporation...
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