Fabrication of Ba0.95M0.05Li2Ti6O14 (M = Ag, Pb, Al) as high performance anode candidates for lithium secondary batteries

摘要: Abstract Using Ag, Pb and Al as dopants, Ba 0.95 M 0.05 Li 2 Ti 6 O 14 is fabricated advanced anode candidate for repeated lithium storage. Owing to smaller ionic radius, Ag + , 2+ 3+ are successfully introduced into the lattice of BaLi which results in formation high purity Ba-site doped (M = Ag, Pb, Al). Compared with pristine sample, M-doped exhibits higher reversible capacity, better rate capability superior cyclability. Especially it presents best electrochemical property among all as-prepared samples. It can deliver a charge capacity 149.1 mAh g −1 after 100 cycles at current density 100 mA g retention 92.27%. In contrast, only provides storage 126.9 mAh g 80.83%. addition, its structural stability reversibility also demonstrated by in-situ X-ray diffraction observation. All these evidences show that metal doping may be an effective method enhance . used possible rechargeable batteries.