Cathode, lithium-air battery comprising the same, and method of preparing the cathode
AssigneeSamsung Electronics Co., Ltd.
InventorsHyunpyo LEE, Taeyoung KIM, Mokwon KIM, Wonsung CHOI
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Abstract
A cathode configured to use oxygen as a cathode active material, the cathode including: a porous film, wherein the porous film includes a metal oxide, and wherein a surface of the porous film has root mean square (RMS) roughness (Rq) of about 0.01 micrometer to about 1 micrometer, and a porosity of the porous film is about 50 volume percent to about 99 volume percent, based on a total volume of the porous film.
Claims34
A cathode configured to use oxygen as a cathode active material, the cathode comprising:
- a porous film,
- wherein the porous film comprises a metal oxide, and
- wherein a surface of the porous film has a root mean square roughness of about 0.01 micrometer to about 1 micrometer, and a porosity of the porous film is about 50 volume percent to about 99 volume percent, based on a total volume of the porous film.
A method of preparing a cathode, the method comprising:
- providing a composition comprising a metal oxide and a binder;
- disposing the composition onto a base;
- drying the composition on the base to prepare a coating layer;
- pressing the coating layer to prepare a sheet;
- and
- heat-treating the sheet in an oxidizing atmosphere at a temperature of about 450° C. to about 800° C. to prepare the cathode.
A cathode configured to use oxygen as a cathode active material, the cathode comprising:
- a porous film,
- wherein the porous film comprises a metal oxide, wherein the metal oxide is a lithium containing metal oxide represented by Formula 1,
- LixAyGzO3-δ Formula 1
- wherein, in Formula 1,
- each A and G are independently at least one of a Group 2 to a Group 16 element,
- 0<x≤1, 0<y≤1, 0<x+y≤1, 0<z≤1.5, and 0≤δ≤1.5, and
- wherein a surface of the porous film has a root mean square roughness of about 0.01 micrometer to about 1 μm micrometer.
Dependencies are inferred from the claim text.