Researchers have removed the traditional graphite electrode from the battery. The new anode has porous structure of interconnected SnO2 nano particles. This anode has 2X more charging capacity as compared to the capacity of graphite. The team leader, Vilas Pol, a professor at chemical engineering department in Purdue University claims that the storage capacity of graphite is not sufficient for the needs in battery technology. The maximum storage capacity of graphite is 372 mAh g-1.
When team of researchers tested this tin-oxide based anode, they found the capacity of battery has become 430 milliamp hours per gram and the anode can be charged is less than 30 minutes. Whereas the battery with traditional graphite electrode takes 10 hours to charge. The porous structure of this anode helps in expanding and contracting during charge-discharge cycles. When the electrode gets heated up to 400 degree Celsius, the tin oxide nanoparticles start getting into the network of pores' structure.
This new battery technology can be very helpful in commercial manufacturing as it can be made by adding tin alkoxide in boiling water. This material is cost-effective and easily available. Pol confirms that they have not applied any complex chemistry here.
Researchers are still working on durability of the battery. They are still testing the battery’s capabilities. Their focus is on improving the number of charge-discharge cycles in fully functioning batteries. The research has been published in November issue of Advance Energy Materials journal.
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