TY - JOUR
T1 - Structural and electrochemical characterization of layered 0.3Li 2MnO3·0.7LiMn0.35-x /3Ni0.5-x/3Co0.15- x/3CrxO2 cathode synthesized by spray drying
AU - He, Zhenjiang
AU - Wang, Zhixing
AU - Cheng, Lei
AU - Zhu, Zhenguo
AU - Li, Tao
AU - Li, Xinhai
AU - Guo, Huajun
PY - 2014/3
Y1 - 2014/3
N2 - Cr doped 0.3Li2MnO3·0.7LiMn 0.35-x/3Ni0.5-x /3Co0.15-x/3CrxO 2 (x = 0, 0.02, 0.04, 0.06) as a cathode material for Li-ion battery has been successfully synthesized by spray drying and subsequent calcination. The effects of Cr dopant on the structural and electrochemical properties of this material have been investigated by XRD, SEM, EDS, charge-discharge measurements, Ac impedance spectroscopy as well as cyclic voltammetry. These results demonstrated that the element Cr distributed uniformly in these materials. With the Cr content increasing, lattice parameters a and c decrease and less Li ion locates in transition metal site. Among the synthesized Cr-doped materials, when x = 0.04, this material shows the best electrochemical properties. Between 2.5 and 4.8 V (vs. Li/Li+), the initial discharge capacities of the materials increased from 143 to 168 mA h g-1 at a constant current density of 250 mA g-1. After 50 cycles, the capacity retention of the materials raised from 83% to 93%.
AB - Cr doped 0.3Li2MnO3·0.7LiMn 0.35-x/3Ni0.5-x /3Co0.15-x/3CrxO 2 (x = 0, 0.02, 0.04, 0.06) as a cathode material for Li-ion battery has been successfully synthesized by spray drying and subsequent calcination. The effects of Cr dopant on the structural and electrochemical properties of this material have been investigated by XRD, SEM, EDS, charge-discharge measurements, Ac impedance spectroscopy as well as cyclic voltammetry. These results demonstrated that the element Cr distributed uniformly in these materials. With the Cr content increasing, lattice parameters a and c decrease and less Li ion locates in transition metal site. Among the synthesized Cr-doped materials, when x = 0.04, this material shows the best electrochemical properties. Between 2.5 and 4.8 V (vs. Li/Li+), the initial discharge capacities of the materials increased from 143 to 168 mA h g-1 at a constant current density of 250 mA g-1. After 50 cycles, the capacity retention of the materials raised from 83% to 93%.
KW - Cathode material
KW - Elements doping
KW - Lithium ion batteries
KW - Spray drying
UR - http://www.scopus.com/inward/record.url?scp=84896490648&partnerID=8YFLogxK
U2 - 10.1016/j.apt.2013.10.008
DO - 10.1016/j.apt.2013.10.008
M3 - Article
AN - SCOPUS:84896490648
SN - 0921-8831
VL - 25
SP - 647
EP - 653
JO - Advanced Powder Technology
JF - Advanced Powder Technology
IS - 2
ER -