Chunyan Lai

Modification of LiNiPO 4 by metal doping and carbon coating

Single-phase LiNiPO<inf>4</inf> and doped and coated LiNiPO4 particles were synthesized by solid-state reaction method. The electrochemical properties of LiNiPO<inf>4</inf>/Li<inf>4</inf>Ti<inf>5</inf>O<inf>12</inf> batteries were analyzed by cyclic voltammetry (CV) and charge/discharge tests. The structural and morphological performance of LiNiPO<inf>4</inf> and doped LiNiPO<inf>4</inf> particles were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FTIR). The results show that the electrochemical properties of doped LiNiPO<inf>4</inf> have been improved.

Improved cycling performance and rate stability of ITO-compounded Li2MnSiO4 for lithium-ion batteries

Li2MnSiO4 compounded with indium tin oxide (ITO) was successfully synthesized through a sol–gel method. The structure and morphology characterization of Li2MnSiO4/ITO nanocomposite are demonstrated by XRD, SEM, TEM, EDS and XPS. Galvanostatic charge–discharge tests, EIS and CV are employed to examine the electrochemical performance of the composite. From those results, it could be observed that the electrochemical performance of Li2MnSiO4 cathode material has been significantly improved due to the introducing of indium tin oxide. The 3 wt% ITO-compounded sample displayed a discharge specific capacity around 141 mA h g−1 at 0.05C, 134.4 mA h g−1 at 0.1C, 132.9 mA h g−1 at 0.2C and 127.4 mA h g−1 at 0.5C in the first cycle, which is much higher than the pristine sample.