Fabrication of porous Ni3S2/Ni nanostructured electrode and its application in lithium ion battery

Porous Ni3S2 nanostructured electrode that direct growth on Ni foam was synthesized via a simple hydrothermal approach. Galvanostatic battery testing shows that Ni3S2/Ni electrode exhibits initial discharge and charge capacity of 535 and 451 mAh g−1 at a current density of 0.1 mA cm−2. After 80 cycles, the discharge and charge capacity maintains at 403 and 398 mAh g−1, respectively. The excellent performances of Ni3S2/Ni electrode are owing to the formation of new porous structure of Ni3S2 electrode during the cycle process, which are relevant to the favorable porous structure of Ni3S2 and its nanoflake morphology as well as direct growth of Ni3S2 on Ni foam.