Abstract
? 2022 Elsevier B.V.To improve the cathode materials performance of Li-ion batteries, an effect of nickel content in lithium borate (xNi:LiBO3) glass systems was introduced. The physical, structural, magnetic and electrochemical properties of xNi:LiBO3 glasses with x = 0, 0.15, 0.20, and 0.25 were carefully studied. XRD, XAS, and XPS techniques were used to investigate the effect of Ni contents in all glass structures. A glass structural motif was clearly confirmed by XRD and TEM results with an absence of crystallization behavior. By VSM measurement, LiBO3 based glass samples exhibited diamagnetism, while Ni doped glass samples exhibited a mixing of paramagnetism and weak ferromagnetism. Interestingly, a mixing valence state of Ni2+ and Ni3+ was observed of all glasses and local bonding distances between Ni-O and Ni-Ni were discovered ranging of 1.98–1.99 ? and 2.72–2.86 ?, respectively. Surprisingly, electrochemical properties of prepared LiBO3 glasses could be enhanced by increasing the Ni content in glass structure. In this study, the 0.25Ni:LiBO3 glass electrode showed the highest specific capacitance of 91.06 F.g?1 at a scan rate of 5 mV/s, indicating that it could be a promising glass electrode for Li ion battery.
NSTL
Elsevier