Hydrothermal Preparation and High Electrochemical Performance of NiS Nanospheres as Anode for Lithium-Ion Batteries
Linhui Wang, Long-Long Ren, Yu-Feng Qin, Qiang Li
Abstract
Nickel sulfide has been widely studied as an anode material for lithium-ion batteries due to its environmental friendliness, low cost, high conductivity, and high theoretical capacity. A simple hydrothermal method was used to prepare NiS nanospheres materials with the size in the range of 100–500 nm. The NiS nanospheres electrodes exhibited a high reversible capacity of 1402.3 mAh g −1 at 200 mA g −1 after 280 cycles and a strong rate capability of 814.8 mAh g −1 at 0.8 A g −1 and 1130.5 mAh g −1 when back to 0.1 A g −1 . Excellent electrochemical properties and the simple preparation method of the NiS nanospheres make it possible to prepare NiS on a large scale as the anode of lithium-ion batteries.