화학공학소재연구정보센터
Electrochimica Acta, Vol.228, 453-461, 2017
Fabrication of Ba0.95M0.05Li2Ti6O14 (M = Ag, Pb, Al) as high performance anode candidates for lithium secondary batteries
Using Ag, Pb and Al as dopants Ba0.95M0.05Li2Ti6O14 is fabricated as advanced anode candidate for repeated lithium storage. Owing to smaller ionic radius Ag+ Pb2+ and A1(3+) are successfully introduced into the lattice of BaLi2Ti6O14 which results in the formation of high purity Ba-site doped Ba0.95M0.05Li2Ti6O14 (M = Ag Pb Al). Compared with the pristine sample M-doped BaLi2Ti6O14 exhibits higher reversible capacity better rate capability and superior cyclability. Especially for Ba0.95Ag0.05Li2Ti6O14 it presents the best electrochemical property among all the as-prepared samples. It can deliver a high reversible charge capacity of 149.1 mAh g(-) after 100 cycles at the current density of 100 mA g(-) with capacity retention of 92.27%. In contrast BaLi2Ti6O14 only provides a lithium storage capacity of 126.9 mAh g(-) with capacity retention of 80.83%. In addition its high structural stability and electrochemical reversibility are also demonstrated by in-situ X-ray diffraction observation. All these evidences show that metal doping may be an effective method to enhance the lithium storage capability of BaLi2Ti6O14. Especially for Ba0.95Ag0.05Li2Ti6O14 it can be used as possible anode candidate for rechargeable batteries. (C) 2017 Elsevier Ltd. All rights reserved.