Surface-treated active materials and surface treatment method thereof
An active material and a surface treatment method of the active material are provided. A surface of the active material may be treated with a coating layer including a first metal oxide containing lithium, and a second metal oxide.
1. An active material having a surface treated with a coating layer comprising a first metal oxide containing lithium, and a second metal oxide,
the coating layer further comprising a polyanion,
the polyanion comprising at least one of (XO 4 ) n− or (XmO 3 m+1) n− ,
X being P, S, As, Mo, W or V, and
n and m being in a range of 1 to 4,
wherein the second metal oxide co at least one selected from the group consisting of P, S, As, Mo, W and V.
2. The active material of claim 1 , wherein the first metal oxide is represented by the following Chemical Formula 1:
Li x M y O z
wherein M comprises at least one selected from the group consisting of Ni, Co, Fe, Mn, Ru, Sn, Cr, Ti, Al, P, V, S, As, Mo and W, and x, y and z are 1 to 8.
3. The active material of claim 1 , wherein a mass ratio of the first metal oxide:the second metal oxide ranges from 1:1 to 1:100.
4. The active material of claim 1 , wherein a mass ratio of the second metal oxide:a polyanion ranges from 1:1 to 1:100.
5. The active material of claim 1 , wherein the first metal oxide has a particle diameter of 10 nanometers (nm) to 5,000 nm.
6. The active material according to claim 1 , wherein the coating layer is derived from a precursor solution comprising the first metal oxide and the second metal oxide.
7. An active material having a surface treated with a coating layer comprising a first metal oxide containing lithium, and a second metal oxide,
the coating layer further comprising a polyanion,
the polyanion comprising at least one of (XO 4 ) n− or (XmO 3 m+1) n− ,
X being P, S, As, Mo, W or V, and
n and m being in a range of 1 to 4,
wherein a mass ratio of the first metal oxide:the second metal oxide ranges from 1:1 to 1:100.
8. The active material of claim 7 , wherein the first metal oxide is represented by the following Chemical Formula 1:
Li x M y O z
wherein M comprises at least one selected from the group consisting of Ni, Co, Fe, Mn, Ru, Sn, Cr, Ti, Al, P, V, S, As, Mo and W, and x, y and z are 1 to 8.
9. The active material of claim 7 , wherein the second metal oxide comprises at least one selected from the group consisting of P, S, As, Mo, W and V.
10. The active material of claim 7 , wherein a mass ratio of the second metal oxide:a polyanion ranges from 1:1 to 1:100.
11. The active material of claim 7 , wherein the first metal oxide has a particle diameter of 10 nanometers (nm) to 5,000 nm.
12. An active material having a surface treated with a coating layer comprising a first metal oxide containing lithium, and a second metal oxide,
the coating layer further comprising a polyanion,
the polyanion comprising at least one of (XO 4 ) n− or (XmO 3 m+1) n− ,
X being P, S, As, Mo, W or V, and
n and m being in a range of 1 to 4,
wherein the first metal oxide has a particle diameter of 10 nanometers (nm) to 5,000 nm.
13. The active material of claim 12 , wherein the first metal oxide is represented by the following Chemical Formula 1:
Li x M y O z
wherein M comprises at least one selected from the group consisting of Ni, Co, Fe, Mn, Ru, Sn, Cr, Ti, Al, P, V, S, As, Mo and W, and x, y and z are 1 to 8.
14. The active material of claim 12 , wherein the second metal oxide comprises at least one selected from the group consisting of P, S, As, Mo, Wand V.
15. The active material of claim 12 , wherein a mass ratio of the first metal oxide:the second metal oxide ranges from 1:1 to 1:100.
16. The active material of claim 12 , wherein a mass ratio of the second metal oxide:a polyanion ranges from 1:1 to 1:100.