Anode for lithium ion secondary battery, lithium ion secondary battery, electric power tool, electrical vehicle, and electric power storage system
View Patent ↗A lithium secondary battery that has high capacity and excellent cycle characteristics is provided. The lithium ion secondary battery includes a cathode, an anode, and an electrolyte. The anode has, on an anode current collector, an anode active material layer including Li x SiF y (1≦x≦2 and 5≦y≦6) as an anode active material.
1. An anode for a lithium ion secondary battery comprising:
an anode current collector; and
an anode active material layer, wherein the anode active material layer comprises: Li x SiF y (1≦x≦2 and 5≦y≦6) and polyvinylidene fluoride (PVDF).
2. The anode for a lithium ion secondary battery according to claim 1 , wherein the Li x SiF y (1≦x≦2 and 5≦y≦6) is Li 2 SiF 6 .
3. The anode for a lithium ion secondary battery according to claim 1 , wherein the anode active material layer further comprises graphite.
4. The anode for a lithium ion secondary battery according to claim 1 , wherein the content of polyvinylidene fluoride is 0.1 parts by weight to 10 parts by weight, both inclusive, when the content of Li x SiF y (1≦x≦2 and 5≦y≦6) is 100 parts by weight.
5. A lithium ion secondary battery comprising:
a cathode;
an anode; and
an electrolyte,
wherein the anode comprises:
an anode current collector; and
an anode active material layer on the anode current collector, wherein the anode active material layer comprises Li x SiF y (1≦x≦2 and 5≦y≦6) and polyvinylidene fluoride (PVDF).
6. The lithium ion secondary battery according to claim 5 , wherein the Li x SiF y (1≦x≦2 and 5≦y≦6) is Li 2 SiF 6 .
7. The lithium ion secondary battery according to claim 5 , wherein the content of polyvinylidene fluoride is 0.1 parts by weight to 10 parts by weight, both inclusive, when the content of Li x SiF y (1≦x≦2 and 5≦y≦6) is 100 parts by weight.
8. An electric power tool acting with the use of a lithium ion secondary battery, wherein the lithium ion secondary battery comprises:
a cathode;
an anode;
and an electrolytic solution as a power source;
wherein the anode comprises:
an anode current collector; and
an anode active material layer on the anode current collector, wherein the anode active material layer comprises: Li x SiF y (1≦x≦2 and 5≦y≦6) and polyvinylidene fluoride (PVDF).
9. An electrical vehicle acting with the use of a lithium ion secondary battery, wherein the lithium ion secondary battery comprises:
a cathode;
an anode;
and an electrolytic solution as a power source,
wherein the anode comprises:
an anode current collector; and
an anode active material layer on the anode current collector, wherein the anode active material layer comprises: Li x SiF y (1≦x≦2 and 5≦y≦6) and polyvinylidene fluoride (PVDF).
10. An electric power storage system acting with the use of a lithium ion secondary battery, wherein the lithium ion secondary battery comprises:
a cathode;
an anode;
and an electrolytic solution as a power storage source,
wherein the anode comprises:
an anode current collector;
an anode active material layer on the anode current collector, wherein the anode active material layer comprises: Li x SiF y (1≦x≦2 and 5≦y≦6) and polyvinylidene fluoride (PVDF).