A conversion-type, NiO–MCMB (mesocarbon microbeads) composite anode prepared by high-energy ball milling is here characterized and tested in lithium half and full cells. An optimized and submicrometric morphology allows the NiO–MCMB electrode to achieve high cell performance and excellent rate capability, that is, delivering specific capacities of 515 and 450 mAhg -1 when cycled at current densities as high as 545 and 1090 mAg -1, respectively. The NiO–MCMB composite anode is studied in a full lithium-ion battery using a high-voltage LiNi0.5Mn1.5O4 electrode that is considered a suitable cathode in combination with conversion-type electrodes. The battery delivers a specific capacity of 90 mAhg -1 with high coulombic efficiency and an average working voltage of 4.1 V. The electrochemical results suggest the viability of the alternative cell configuration here adopted for the development of low cost, high-energy-density lithium-ion batteries.
High-Capacity NiO-(Mesocarbon Microbeads) Conversion Anode for Lithium-Ion Battery
HASSOUN, Jusef
2015
Abstract
A conversion-type, NiO–MCMB (mesocarbon microbeads) composite anode prepared by high-energy ball milling is here characterized and tested in lithium half and full cells. An optimized and submicrometric morphology allows the NiO–MCMB electrode to achieve high cell performance and excellent rate capability, that is, delivering specific capacities of 515 and 450 mAhg -1 when cycled at current densities as high as 545 and 1090 mAg -1, respectively. The NiO–MCMB composite anode is studied in a full lithium-ion battery using a high-voltage LiNi0.5Mn1.5O4 electrode that is considered a suitable cathode in combination with conversion-type electrodes. The battery delivers a specific capacity of 90 mAhg -1 with high coulombic efficiency and an average working voltage of 4.1 V. The electrochemical results suggest the viability of the alternative cell configuration here adopted for the development of low cost, high-energy-density lithium-ion batteries.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
