Anode and battery
View Patent ↗A battery capable of improving cycle characteristics and a manufacturing yield is provided. An anode includes: an anode current collector; and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including a plurality of pores, and the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry.
1. An anode comprising:
an anode current collector; and
an anode active material layer arranged on the anode current collector,
wherein
the anode active material layer includes an anode active material including a plurality of pores,
the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry, and
the rate of change in the amount of mercury intruded has another peak in a diameter range from 3 nm to 50 nm both inclusive.
2. The anode according to claim 1 , wherein the rate of change in the amount of mercury intruded has a peak in a diameter range from 100 nm to 1000 nm both inclusive.
3. The anode according to claim 1 , wherein the rate of change in the amount of mercury intruded has a peak in a diameter range from 120 nm to 600 nm both inclusive.
4. The anode according to claim 1 , wherein the anode active material includes silicon (Si).
5. The anode according to claim 4 , wherein the anode active material includes oxygen (O), and the oxygen content in the anode active material is within a range from 3 at % to 40 at % both inclusive.
6. The anode according to claim 4 , wherein the anode active material includes at least one kind of metal element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni), chromium (Cr), titanium (Ti) and molybdenum (Mo).
7. The anode according to claim 1 , wherein the anode active material is in the form of a plurality of particles.
8. The anode according to claim 7 , wherein the anode active material has a multilayer configuration in its particles.
9. The anode according to claim 1 , wherein the anode active material is formed by a vapor-phase method.
10. The anode according to claim 1 , wherein the ten-point height of roughness profile Rz of the surface of the anode current collector is within a range from 1.5 μm to 6.5 μm both inclusive.
11. An anode comprising:
an anode current collector; and
an anode active material layer arranged on the anode current collector,
wherein
the anode active material layer includes an anode active material including a plurality of pores, and
the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry, and
the anode active material includes an oxygen-containing region including oxygen in its thickness direction, and the oxygen content in the oxygen-containing region is higher than the oxygen content in a region other than the oxygen-containing region.
12. The anode according to claim 11 , wherein the rate of change in the amount of mercury intruded has another peak in a diameter range from 3 nm to 50 nm both inclusive.
13. A battery comprising a cathode, an anode and an electrolytic solution, wherein:
the anode includes an anode current collector and an anode active material layer arranged on the anode current collector,
the anode active material layer includes an anode active material including a plurality of pores,
the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry, and
the anode active material includes oxygen, and the oxygen content in the anode active material is within a range from 3 at % to 40 at % both inclusive.
14. The battery according to claim 13 , wherein the rate of change in the amount of mercury intruded has a peak in a diameter range from 100 nm to 1000 nm both inclusive.
15. The battery according to claim 13 , wherein the rate of change in the amount of mercury intruded has a peak in a diameter range from 120 nm to 600 nm both inclusive.
16. The battery according to claim 13 , wherein the rate of change in the amount of mercury intruded has another peak in a diameter range from 3 nm to 50 nm both inclusive.
17. The battery according to claim 13 , wherein the anode active material includes silicon.
18. The battery according to claim 17 , wherein the anode active material includes at least one kind of metal element selected from the group consisting of iron, cobalt, nickel, chromium, titanium and molybdenum.
19. The battery according to claim 13 , wherein the anode active material is in the form of a plurality of particles.
20. The battery according to claim 19 , wherein the anode active material has a multilayer configuration in its particles.
21. The battery according to claim 13 , wherein the anode active material is formed by a vapor-phase method.
22. The battery according to claim 13 , wherein the ten-point height of roughness profile Rz of the surface of the anode current collector is within a range from 1.5 μm to 6.5 μm both inclusive.
23. The battery according to claim 13 , wherein the electrolytic solution includes a solvent including a sultone.
24. The battery according to claim 23 , wherein the sultone is 1,3-propene sultone.
25. The battery according to claim 13 , wherein the electrolytic solution includes a solvent including a cyclic carbonate including an unsaturated bond.
26. The battery according to claim 25 , wherein the cyclic carbonate including an unsaturated bond is vinylene carbonate or vinyl ethylene carbonate.
27. The battery according to claim 13 , wherein the electrolytic solution includes a solvent including a fluorinated carbonate.
28. The battery according to claim 27 , wherein the fluorinated carbonate is difluoroethylene carbonate.
29. The battery according to claim 13 , wherein the electrolytic solution includes a solvent including an acid anhydride.
30. The battery according to claim 29 , wherein the acid anhydride is sulfobenzoic anhydride or sulfopropionic anhydride.
31. The battery according to claim 13 , wherein the electrolytic solution includes an electrode salt including boron (B) and fluorine (F).
32. The battery according to claim 31 , wherein the electrolyte salt is lithium tetrafluoroborate (LiBF 4 ).
33. The battery according to claim 13 , wherein the cathode, the anode and the electrolytic solution are contained in a cylindrical or prismatic package member.
34. The battery according to claim 33 , wherein the package member includes iron or an iron alloy.
35. A battery comprising a cathode, an anode and an electrolytic solution, wherein:
the anode includes an anode current collector and an anode active material layer arranged on the anode current collector,
the anode active material layer includes an anode active material including a plurality of pores,
the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry, and
the anode active material includes an oxygen-containing region including oxygen in its thickness direction, and the oxygen content in the oxygen-containing region is higher than the oxygen content in a region other than the oxygen-containing region.
36. The battery according to claim 35 , wherein the rate of change in the amount of mercury intruded has another peak in a diameter range from 3 nm to 50 nm both inclusive.