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US 8,795,871 B2Granted
Electrode assembly and secondary battery having the same
AssigneeSamsung SDI Co., Ltd.
InventorsWan-Mook Lim, Kyu-Nam Han, Myung-Ro Lee
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Abstract
An electrode assembly for a battery. The electrode assembly includes a positive electrode with a positive electrode active material layer and a negative electrode with a negative electrode active material layer. The assembly further includes a separator that has a porous layer formed of a ceramic material and a binder and a polyolefin resin layer. The porous layer has a thickness of about 4 to 6 μm and the polyolefin resin layer has a thickness of about 12 to 16 μm.
Claims20
An electrode assembly for a battery, the assembly comprising:
- a first electrode comprising a first electrode active material and a first binder, wherein the first electrode further comprises 0.1 to 30 wt % of the first binder based on the total weight of the first electrode active material;
- a second electrode comprising a second electrode active material and a second binder, wherein the second electrode further comprises 0.1 to 30 wt % of the second binder based on the total weight of the second electrode active material;
- and
- a separator between the first and second electrodes, the separator including a porous layer and a polyolefin resin layer, the porous layer having a ceramic component and a third binder,
- wherein the porous layer has a thickness of approximately 4 to 6 μm and the polyolefin resin layer has a thickness of approximately 12 to 16 μm,
- wherein the porous layer is formed on the second electrode, and
- wherein the second binder and the third binder are either an aqueous binder or an organic binder and when the second binder is an aqueous binder, the third binder is an organic binder, and when the second binder is an organic binder, the third binder is an aqueous binder.
4 more elements
A secondary battery comprising:
- an electrolyte
- an electrode assembly including a first electrode including a first electrode active material and a first binder, a second electrode including a second electrode active material and a second binder, and a separator disposed between the first electrode and the second electrode;
- a can accommodating the electrolyte and the electrode assembly, the can including an open end;
- a cap assembly disposed at the open end of the can,
- wherein the separator includes a porous layer and a polyolefin resin layer, wherein the porous layer includes a ceramic component and a third binder, and the porous layer is disposed between the second electrode and the polyolefin resin layer,
- wherein a thickness of the porous layer is 4 to 6 μm and a thickness of the polyolefin resin layer is 12 to 16 μm,
- wherein the first binder of the first electrode is 0.1 to 30 wt % based on the total weight of the first electrode active material, and the second binder of the second electrode is 0.1 to 30 wt % based on the total weight of the second electrode active material,
- wherein the second and third binders are either aqueous or organic binder and when the second binder is an aqueous binder, the third binder is an organic binder, and when the second binder is an organic binder, the third binder is an aqueous binder.
5 more elements
Dependencies are inferred from the claim text.