All-solid-state lithium-ion secondary battery and production method thereof
A secondary battery and manufacturing method technology, applied in the direction of secondary battery, electrolyte battery manufacturing, lithium battery, etc., can solve the problems of poor high-rate discharge characteristics, small effective surface area, and inability to achieve high current, etc., to achieve excellent high The effect of rate discharge characteristics
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Embodiment 1
[0082] With respect to 1 equivalent of titanium isopropoxide, 1.25 equivalents of lithium acetate were mixed, and then 20 equivalents of isopropanol and 1 equivalent of polyvinylpyrrolidone were added and stirred to obtain a sol-like anode precursor.
[0083] In addition, with respect to 1 equivalent of butoxy aluminum, mix 6 equivalents of butoxy titanium, 10 equivalents of ammonium dihydrogen phosphate, and 5 equivalents of lithium acetate, then add 20 equivalents of butanol and stir to obtain a sol-like Solid electrolyte layer precursor.
[0084] In addition, with respect to 1 equivalent of cobalt acetate, add 1 equivalent of lithium acetate, 20 equivalents of acetic acid, 20 equivalents of water, 20 equivalents of isopropanol, and 1 equivalent of polyvinylpyrrolidone, and stir to obtain a sol-like cathode precursor .
[0085] Next, Ni paste was applied on the PET film and dried to form a Ni layer as a current collector. A sol-form anode precursor was coated on the Ni lay...
Embodiment 2
[0089] Except using the screen printing method instead of the nozzle method as the method of coating the anode precursor, the solid electrolyte layer precursor, and the cathode precursor, operate in the same manner as in Example 1 to manufacture the chip-type all-solid lithium ion secondary battery of Example 2 .
[0090] For the obtained all-solid lithium ion secondary battery, the interface between the anode and the solid electrolyte layer and the interface between the cathode and the solid electrolyte layer were confirmed by SEM and TEM. It can be confirmed that at the interface between the anode and the solid electrolyte layer, a mixed region (thickness 0.5 μm) where these constituent materials are mixed is formed; at the interface between the cathode and the solid electrolyte layer, a mixed region (thickness 0.3 μm) where these constituent materials are mixed is formed. ).
Embodiment 3
[0092] Except using the spin coating method instead of the nozzle method as the method of coating the anode precursor, the solid electrolyte layer precursor, and the cathode precursor, the same operation was performed as in Example 1 to manufacture the chip-type all-solid lithium ion secondary battery of Example 3.
[0093] For the obtained all-solid lithium ion secondary battery, the interface between the anode and the solid electrolyte layer and the interface between the cathode and the solid electrolyte layer were confirmed by SEM and TEM. It can be confirmed that at the interface between the anode and the solid electrolyte layer, a mixed region (thickness 0.3 μm) where these constituent materials are mixed is formed; at the interface between the cathode and the solid electrolyte layer, a mixed region (thickness 0.3 μm) where these constituent materials are mixed is formed. ).
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