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HIGH CAPACITY LITHIUM-ION BATTERIES TO BE STABILIZED BY NEW MATERIALS

- Jul 30, 2018 -

Scientists are look for new ways to stabilize batteries with high capacity. The material is mainly designed based on lithium-manganese –oxide cathode which if proven to be working properly could help more than double the life cycle of cellphones and electric cars batteries.


The tests conducted on the battery electrode show that it was one of the highest capacity ever recorder for a transition metal oxide based electrode. It’s in fact more than double the capacity of conventional lithium-ion batteries. As seen by researchers, the high capacity displayed by this new material could help advance the lithium-ion use on electric automobiles.


As conventionally discovered, the batteries work by moving back and forth between the anode and cathode. The cathode is usually made from a compound that is composed of lithium ions mixed with transition metal and oxygen.  The cobalt usually used as the transition metal, stores and releases electrical energy  when the lithium ions move from the anode to the cathode and back to the anode but the main issue is that the capacity is usually limited by the number of electrons in the cobalt.


Even though this material has been previously reported by another research team, this new way is done by replacing the traditional cobalt with the less expensive material which is manganese-oxide and holds a higher capacity. The main challenge was to bring the material to keep up on longer life cycle as it was getting degraded just after two cycle of charge/discharge. The team slowly discovered that the material loss of capacity was due to the force use of the oxygen in its process to store and release electrical energy. By stabilizing the battery to prevent its rapid degradation, the researchers use managed to find new ways to allow the compound to be mixed with other element that enhance the battery strength to hold more capacity.


The main materials chosen that can be mixed with lithium manganese oxide to produce stable compounds are chromium and vanadium, and will help maintain the cathode high capacity. These new materials can hold the keys to future battery technology that can hold our electronics energy for as long as needed.