Porous electrode active material and secondary battery including the same
Provided are an electrode active material having a plurality of pores and a secondary battery including the same, and more particularly, a porous electrode active material including silicon-based oxide expressed by SiO x (0.5≦x≦1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m 2 /g to 100 m 2 /g, and a secondary battery including a cathode including a cathode active material, a separator, an anode including an anode active material, and an electrolyte, in which the anode active material includes a porous electrode active material including silicon-based oxide expressed by SiO x (0.5≦x≦1.2) and having a BET specific surface area ranging from 2 m 2 /g to 100 m 2 /g.
1. A porous electrode active material comprising silicon-based oxide expressed by SiO x (0.5≦x≦1.2) and having a Brunauer, Emmett, and Teller (BET) specific surface area ranging from 2 m 2 /g to 100 m 2 /g,
wherein porosity is in a range of from 5% to 90%, and
wherein pores in a honeycomb shape are included at least on a surface of the porous electrode active material.
2. The porous electrode active material of claim 1 , wherein the SiO x is silicon monoxide.
3. A secondary battery comprising:
a cathode including a cathode active material;
a separator;
an anode including an anode active material; and
an electrolyte,
wherein the anode active material comprises the porous electrode active material of any one of claims 1 or 2 .
4. The secondary battery of claim 3 , wherein the anode electrode active material further comprises one or more selected from the group consisting of graphite, soft carbon, hard carbon, and lithium titanium oxide.