TY - JOUR
T1 - Improvement of Capacity and Cycling Performance of Spinel LiMn2O4 Cathode Materials with TiO2-B Nanobelts
AU - Zhang, J.Y.
AU - Shen, J.X.
AU - Wang, T.L.
AU - Wei, C.B.
AU - Ma, Y.
AU - Zhu, C.F.
AU - Yue, Yuanzheng
PY - 2013
Y1 - 2013
N2 - The spinel LiMn2O4 was modified with TiO2-B nanobelts to improve its specific capacity and cycling performance. TiO2-B/LiMn2O4 composites were fabricated by a facile liquid phase mixing method. The morphology and structure of the samples were characterized by means of X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that TiO2-B nanobelts are uniformly distributed in LiMn2O4 particle. Compared with bare LiMn2O4, TiO2-B/LiMn2O4 composite cathode material shows enhanced specific capacity of 129 mA h g−1 and improved cycling stability. After 50 cycles, the 0, 0.5, 1.0, 2.0 and 3.0 wt.% TiO2-B nanobelts modified LiMn2O4 exhibited the capacity retention of 86.1, 92.6, 93.7, 94.5 and 92.8%, respectively. The improvement of the electrochemical performance is attributed to suppression of Mn2+ dissolution, higher structural stability of the composite and rapid Li+ diffusion resulting from the open lattice channels and unique one-dimensional structure of TiO2-B nanobelts.
AB - The spinel LiMn2O4 was modified with TiO2-B nanobelts to improve its specific capacity and cycling performance. TiO2-B/LiMn2O4 composites were fabricated by a facile liquid phase mixing method. The morphology and structure of the samples were characterized by means of X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The results show that TiO2-B nanobelts are uniformly distributed in LiMn2O4 particle. Compared with bare LiMn2O4, TiO2-B/LiMn2O4 composite cathode material shows enhanced specific capacity of 129 mA h g−1 and improved cycling stability. After 50 cycles, the 0, 0.5, 1.0, 2.0 and 3.0 wt.% TiO2-B nanobelts modified LiMn2O4 exhibited the capacity retention of 86.1, 92.6, 93.7, 94.5 and 92.8%, respectively. The improvement of the electrochemical performance is attributed to suppression of Mn2+ dissolution, higher structural stability of the composite and rapid Li+ diffusion resulting from the open lattice channels and unique one-dimensional structure of TiO2-B nanobelts.
U2 - 10.1016/j.electacta.2013.08.063
DO - 10.1016/j.electacta.2013.08.063
M3 - Journal article
SN - 0013-4686
VL - 111
SP - 691
EP - 697
JO - Electrochimica Acta
JF - Electrochimica Acta
ER -