METHOD FOR PRODUCING NEGATIVE ELECTRODE FOR LITHIUM ION BATTERY AND METHOD FOR PRODUCING LITHIUM ION BATTERY
A method for producing a negative electrode for a lithium ion battery comprising heat-treating a negative electrode active material layer that is placed on a negative electrode current collector and includes a carbon material as a negative electrode active material and a binder until dry, and placing the layer under a hydrogen-containing atmosphere.
1 . A method for producing a negative electrode for a lithium ion battery comprising
heat-treating a negative electrode active material layer that is placed on a negative electrode current collector and includes a carbon material as a negative electrode active material and a binder until dry, and
placing the layer under a hydrogen-containing atmosphere.
2 . The method for producing a negative electrode for a lithium ion battery according to claim 1 , comprising
a drying step of drying the negative electrode active material layer by the heat treatment, and
a hydrogen treatment step of placing the dried negative electrode active material layer under a hydrogen-containing atmosphere.
3 . The method for producing a negative electrode for a lithium ion battery according to claim 2 , wherein the drying step is conducted under an inert gas atmosphere.
4 . The method for producing a negative electrode for a lithium ion battery according to claim 2 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.
5 . The method for producing a negative electrode for a lithium ion battery according to claim 2 , wherein
the temperature of the heat treatment is 80° C. or more and 200° C. or less, and
the treatment temperature in the hydrogen treatment step is 200° C. or less.
6 . The method for producing a negative electrode for a lithium ion battery according to claim 2 , wherein the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
7 . The method for producing a negative electrode for a lithium ion battery according to claim 2 , wherein
the drying step is conducted under an inert gas atmosphere,
the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas, and
the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
8 . The method for producing a negative electrode for a lithium ion battery according to claim 1 , comprising a dry hydrogen treatment step of drying the negative electrode active material layer by the heat treatment in a state that the layer is placed under a hydrogen-containing atmosphere.
9 . The method for producing a negative electrode for a lithium ion battery according to claim 8 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.
10 . The method for producing a negative electrode for a lithium ion battery according to claim 8 , wherein the temperature of the heat treatment is 80° C. or more and 200° C. or less.
11 . A method for producing a lithium ion battery comprising an electrode assembly including a negative electrode that contains a carbon material as a negative electrode active material, a positive electrode, and a separator, a package, and an electrolytic solution,
wherein the electrode assembly placed in the package is heat-treated until dry and placed under a hydrogen-containing atmosphere.
12 . The method for producing a lithium ion battery according to claim 11 , comprising
a drying step of drying the electrode assembly placed in the package by the heat treatment,
a hydrogen treatment step of placing the dried electrode assembly placed in the package under a hydrogen-containing atmosphere, and
a solution injection step of injecting the electrolytic solution in the package in this order.
13 . The method for producing a lithium ion battery according to claim 12 , wherein the drying step is conducted under an inert gas atmosphere.
14 . The method for producing a lithium ion battery according to claim 12 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.
15 . The method for producing a lithium ion battery according to claim 12 , wherein
the temperature of the heat treatment is 80° C. or more and 200° C. or less, and
the treatment temperature in the hydrogen treatment step is 200° C. or less.
16 . The method for producing a lithium ion battery according to claim 12 , wherein the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
17 . The method for producing a lithium ion battery according to claim 12 , wherein
the drying step is conducted under an inert gas atmosphere,
the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas, and
the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
18 . The method for producing a lithium ion battery according to claim 11 , comprising
a dry hydrogen treatment step of drying the electrode assembly placed in the package by the heat treatment in a state that the assembly is placed under a hydrogen-containing atmosphere, and
a solution injection step of injecting the electrolytic solution in the package in this order.
19 . The method for producing a lithium ion battery according to claim 18 , wherein the temperature of the heat treatment is 80° C. or more and 200° C. or less.
20 . The method for producing a lithium ion battery according to claim 18 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.
21 . A method for producing a negative electrode for a lithium ion battery comprising
placing a negative electrode slurry including a carbon material as a negative electrode active material, a binder, and a solvent on a negative electrode current collector,
heat-treating the negative electrode slurry on the negative electrode current collector until dry, and
placing the slurry under a hydrogen-containing atmosphere.
22 . The method for producing a negative electrode for a lithium ion battery according to claim 21 , comprising
a drying step of drying the negative electrode slurry on the negative electrode current collector by the heat treatment to remove the solvent to thereby form a negative electrode active material layer, and
a hydrogen treatment step of placing the negative electrode active material layer under a hydrogen-containing atmosphere.
23 . The method for producing a negative electrode for a lithium ion battery according to claim 22 , wherein the drying step is conducted under an inert gas atmosphere.
24 . The method for producing a negative electrode for a lithium ion battery according to claim 22 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.
25 . The method for producing a negative electrode for a lithium ion battery according to claim 22 , wherein
the temperature of the heat treatment is 80° C. or more and 200° C. or less, and
the treatment temperature in the hydrogen treatment step is 200° C. or less.
26 . The method for producing a negative electrode for a lithium ion battery according to claim 22 , wherein the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
27 . The method for producing a negative electrode for a lithium ion battery according to claim 22 , wherein
the drying step is conducted under an inert gas atmosphere,
the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas, and
the drying step and the hydrogen treatment step are conducted sequentially in the same drying furnace.
28 . The method for producing a negative electrode for a lithium ion battery according to claim 21 , comprising a dry hydrogen treatment step of drying the negative electrode slurry on the negative electrode current collector by the heat treatment in a state that the slurry is placed under a hydrogen-containing atmosphere to remove the solvent to thereby form a negative electrode active material layer.
29 . The method for producing a negative electrode for a lithium ion battery according to claim 28 , wherein the temperature of the heat treatment is 80° C. or more and 200° C. or less.
30 . The method for producing a negative electrode for a lithium ion battery according to claim 28 , wherein the hydrogen-containing atmosphere is a mixed gas comprising hydrogen gas and an inert gas.