Sc improves lithium titanate anode performance Li4 Ti5 O12 and Li3.7 Sc0.3 Ti4.7 Nb0.3 O12 based on the stoichiometric formula Li4-x ScxTi5-y NbyO12 were synthesized by the chemical method of sol-gel technique. A comparison of the specific capacity of pure and doped lithium titanate electrodes revealed that at the 1 C there is increase in specific capacity by 7.98 % ( from 213 mA/g to 230 mA/g) due to the incorporation of double dopant (Scandium& Niobium) in parent lithium titanate electrode. Remarkable increases in the discharge capacity of the PTO electrode are observed after the incorporation of dopants. An increase of 1.82% in discharge capacity at 2 C and 7.1% increase in discharge capacity at 1 C are observed after the incorporation of dopants even at 100 cycles. There are considerable decreases in real impedance observed in the case of Li3.7 Sc0.3 Ti4.7 Nb0.3 O12 in comparison to pure Li4 Ti5 O12. It reflects that the conductivity of the electrode after incorporation of double dopants i.e. Sc and Nb gets increased, hence there is an increase in conductivity, and better ionic movement among the electrodes is expected. All the findings indicate that Li3.7 Sc0.3 Ti4.7 Nb0.3 O12 electrodes may be a competent anode for a lithium-ion battery.
https://chalcogen.ro/933_KumarC.pdf