Ultrasmall MoS₃ Loaded GO Nanocomposites as High‐Rate and Long‐Cycle‐Life Anode Materials for Lithium‐ and Sodium‐Ion Batteries

Abstract

MoS3 is a promising anode material due to its high theoretical capacity (838 mAh g−1), high conductivity, low cost, and environmental friendliness. However, the big volume changes upon cycling can induce particle pulverization, leading to a poor cycling performance, especially at high rates. Herein, nanocomposites of amorphous ultrasmall MoS3 nanoparticles and loaded graphene oxide (GO/MoS3) have been prepared via a facile acid precipitation method. Three nanocomposites were obtained by changing the amounts of GO. They were employed as anode materials for both lithium‐ and sodium‐ion batteries. Using GO as the buffer layer, the volume changes can be effectively suppressed. The material exhibits better lithium‐ and sodium‐storage performances than pure MoS3. An optimized nanocomposite containing 30 mg of GO shows the highest specific capacity of 685 mAh g−1 after 1000 cycles, even at 2 A g−1. Different from lithium‐ion batteries, the nanocomposite containing 50 mg of GO demonstrates a superior cycling stability in sodium‐ion batteries in comparison with the other nanocomposites. It delivers a high reversible specific capacity of 272 mAh g−1 after 700 cycles at 1 A g−1. The excellent electrochemical performances of these nanocomposites could be attributed to the synergistic effect of GO and MoS3.

Harnessing the Volume Expansion of MoS3 Anode by Structure Engineering to Achieve High Performance Beyond Lithium‐Based Rechargeable Batteries

“…Though, to the best of our knowledge, controllable preparation of 2D amorphous MoS 3 ‐based heterostructure has not yet been reported. [ 48,49 ]…”

Efficient Synthesis and Characterization of Robust MoS2 and S Cathode for Advanced Li–S Battery: Combined Experimental and Theoretical Studies

“…Arguably, the wide discharge plateau exhibited less than 0.7 V, suggest battery chemistry could be controlled by either parasitic reaction resulting in the formation of metallic molybdenum (MoS 2 + 4Li → 2Li 2 S + Mo) or intercalation of lithium ion in the RGO nanostructure . Zhou et al demonstrated the application of MoS 3 -loaded graphene oxide composite electrode, with a capacity of ∼400 mA h/g at a current load of 500 mA h/g, for lithium-ion batteries . Also, alleviating the passivation layer formed by irreversible Li 2 S is also crucial toward long-life Li–S battery.…”

The main problems and solutions in practical application of anode materials for sodium ion batteries and the latest research progress

“…At 2 Ag −1 The reversible capacity is 334.6 mAhg −1 after 1200 cycles at high current density. Zhou et al 103 prepared nanocomposites of amorphous ultra‐small MoS 3 nanoparticles and supported graphene oxide (GO/MoS 3 ). The sodium storage property was optimized by changing the amount of GO in the composite.…”