Lithium sulfur battery anode structure including carbon coating layer and carbon structure layer immersed with sulfur
An anode structure of a lithium sulfur battery includes a sulfur anode laminated on an aluminum foil, and a carbon coating layer disposed between the sulfur anode and a carbon structure layer in which sulfur is immersed. The sulfur anode includes the sulfur, a conductor, and a binder. The carbon structure layer in which sulfur is immersed is a polyester (PE) separation membrane separated from a counter electrode. A loaded amount of sulfur within the anode structure is dispersed to the sulfur anode and the carbon structure layer in which the sulfur is immersed.
1. An anode structure of a lithium sulfur battery comprising:
an aluminum foil;
a sulfur anode disposed and laminated on the aluminum foil;
a carbon coating layer disposed on the sulfur anode; and
a carbon structure layer disposed on the carbon coating layer,
wherein the sulfur anode includes a first sulfur, a conductor, and a binder,
a second sulfur is immersed in the carbon structure layer, and
a loaded amount of sulfur within the anode structure is dividedly dispersed to the sulfur anode and the carbon structure layer.
2. The anode structure of claim 1 , wherein the sulfur anode is rolled to have a clad sheet density of greater than or equal to 1 g/cc and less than or equal to 2 g/cc.
3. The anode structure of claim 1 , wherein the sulfur anode contains 0.5 to 7.0 mg/cm 2 of the first sulfur.
4. The anode structure of claim 1 , wherein the conductor is one or more types selected from the group consisting of graphite, vapor grown carbon fibers, acetylene black, carbon black, carbon nanotubes, multi-walled carbon nanotubes, and ordered mesoporous carbon.
5. The anode structure of claim 1 , wherein the binder is one or more types selected from the group consisting of polyvinyl acetate, polyvinyl alcohol, polyethylene oxide, polyvinylpyrrolidone, polystyrene, polyvinyl ether, polymethylmethacrylate, polyvinylidene fluoride, a polyhexafluoropropylene-polyvinylidene fluoride copolymer, polyethylacrylate, polytetrafluoroethylene, polyvinyl chloride, polyacrylonitrile, carboxylmethylcellulose (CMC), styrenebutadiene rubber (SBR), derivatives, and mixtures thereof.
6. The anode structure of claim 1 , wherein the carbon coating layer is one or more types selected from the group consisting of vapor grown carbon fibers, acetylene black, carbon black, carbon nanotubes, multi-walled carbon nanotubes, and ordered mesoporous carbon.
7. The anode structure of claim 1 , wherein the carbon structure layer in which sulfur is immersed forms a structure layer with one or more types of carbon materials selected from the group consisting of carbon fiber and acetylene black.
8. The anode structure of claim 1 , wherein the carbon structure layer in which the second sulfur is immersed contains 0.5 to 7.0 mg/cm 2 of the second sulfur.