Cobalt Lithium Ion Battery

New cobalt free lithium ion battery reduces costs without sacrificing performance these powder samples will be fabricated to become the cobalt free cathode.

Cobalt lithium ion battery.

Lithium cobalt oxide sometimes called lithium cobaltate or lithium cobaltite is a chemical compound with formula licoo 2 the cobalt atoms are formally in the 3 oxidation state hence the iupac name lithium cobalt iii oxide. Lithium cobalt oxide is a dark blue or bluish gray crystalline solid and is commonly used in the positive electrodes of lithium ion batteries. Currently the most popular lithium ion technology is the lithium cobalt oxide lco battery which has a cathode composed of licoo 2 the main feature of the lco battery is the high energy density translating into a long run time for portable devices such as cell phones tablets laptops and cameras. Cobalt is 28 500 per ton and it makes up 10 to 30 of most lithium ion battery cathodes.

A prototype li ion battery was developed by akira yoshino in 1985 based on earlier research by john goodenough m. Lithium ion batteries make up a signficant proportion of the cost of electric vehicles but tesla s use of new cobalt free technology could reduce prices considerably potentially shifting the. It is a hard lustrous silver gray metal that is extracted as a by product when mining nickel and copper. A small quantity of the cobalt shifts in oxidation state from 3 to 4 to make up for the removal of the lithium ion.

One of the simplest cathode materials is lithium cobalt oxide li co o 2 and he chose it as an example. The nominal voltage of a lithium ion battery is calculated by taking a fully charged battery of about 4 20v fully discharging it to about 3 00v at a rate of 0 5c while measuring the average voltage. Austin texas for decades researchers have looked for ways to eliminate cobalt from the high energy batteries that power electronic devices due to its high cost and the human rights. How does cobalt work in li ion.

In a lithium ion battery what we are trying to do during charging is to take the lithium ions out of the oxide and intercalate or insert them into a graphite electrode. Because of the lower internal resistance the average voltage of a spinel system will be higher than that of the cobalt based equivalent. Stanley whittingham rachid. During discharging exactly the opposite happens explained abraham.

Lithium cobalt oxide is an intercalation compound with the lithium cobalt and oxygen arranged in two dimensional layers. And we are completely eliminating it. A layer of lithium then a layer of oxygen a layer of cobalt a different.