1 Section of Chemistry, The Faculty of Engineering and Science, Aalborg University, VBN2 Department of Chemistry and Bioscience, The Faculty of Engineering and Science, Aalborg University, VBN3 Inorganic Amorphous Materials, The Faculty of Engineering and Science, Aalborg University, VBN4 The Faculty of Engineering and Science (ENG), Aalborg University, VBN5 Qilu University of Technology6 Shandong University7 Qilu University of Technology8 Shandong University
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.