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A high-performance electrode material for lithium-ion batteries

By Paul Grad |

A huge market for lithium ion batteries is expected to develop as car makers move toward electric vehicles. However, improvements in the batteries’ energy and power density are needed. It is also desirable to replace the common, high-cost lithium cobalt oxide cathodes with those based on more abundant and more environmentally friendly materials. Now, a group from the Dept. of Energy Engineering, Hanyang University (Seoul, South Korea; www.hanyang.ac.kr) and the Dept. of Chemistry, University of Rome Sapienza (Rome, Italy; www.uniroma1.it), believes it has developed high-performance electrode materials that fulfill the requirements expected of advanced energy-storage systems. The group uses a combination of a stable, high performance Sn-C anode with a morphologically and structurally optimized Li[Ni0.45Co0.1Mn1.45]O4 cathode. The cathode is made by a coprecipitation method, which uses stoichiometric proportions of high-purity NiSO4 .6H2O, CoSO4 .7H2O, and MnSO4 .5H2O as the starting materials for the synthesis of [Ni0.225Co0.05Mn0.725](OH)2. An aqueous solution of the starting materials with a concentration of 2.4 mol/L is pumped into a continuously stirred tank reactor under a N2 atmosphere. Simultaneously, an aqueous solution…
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