Abstract
Nanoparticle-decorated MoS2 can effectively improve the electrochemical performance of lithium-ion battery. Among this structure, nanoparticles can act as a spacer to prevent the restack of adjacent MoS2 nanosheets and make them accessible to the electrolyte, which is a source of Li-ions. In this study, a facile synthesis of Ge/MoS2 composites has been developed. Ge/MoS2 composites exhibit the superior performance of 1362 mA h/g with the current density at 0.2 A/g after 50 cycles. Highly reversible and stable specific capacity of Ge/MoS2 composites at high rate (5 and 7 A/g) can be achieved for 100 cycles. The average specific capacity at 5 and 7 A/g is approximately 790 and 594 mA h/g, respectively. Herein, Ge nanoparticles not only play an important role to stabilize the structure but also to effectively enhance the high rate capability (>1 A/g) of Ge/MoS2 composites. For further application, coin-typed full-cell (CR2032) was assembled with a Ge/MoS2 anode and a Li(MnCoNi)O2 cathode to power the light-emitting diode (LED) array.