Approaching the Lithiation Limit of MoS₂ While Maintaining Its Layered Crystalline Structure to Improve Lithium Storage

Abstract

MoS2 holds great promise as high‐rate electrode for lithium‐ion batteries since its large interlayer can allow fast lithium diffusion in 3.0–1.0 V. However, the low theoretical capacity (167 mAh g−1) limits its wide application. Here, by fine tuning the lithiation depth of MoS2, we demonstrate that its parent layered structure can be preserved with expanded interlayers while cycling in 3.0–0.6 V. The deeper lithiation and maintained crystalline structure endows commercially micrometer‐sized MoS2 with a capacity of 232 mAh g−1 at 0.05 A g−1 and circa 92 % capacity retention after 1000 cycles at 1.0 A g−1. Moreover, the enlarged interlayers enable MoS2 to release a capacity of 165 mAh g−1 at 5.0 A g−1, which is double the capacity obtained under 3.0–1.0 V at the same rate. Our strategy of controlling the lithiation depth of MoS2 to avoid fracture ushers in new possibilities to enhance the lithium storage of layered transition‐metal dichalcogenides.

Decimal Solvent-Based High-Entropy Electrolyte Enabling the Extended Survival Temperature of Lithium-Ion Batteries to −130 °C

“…Considering that some solvents possess lower LUMO compared with EC, FEC was used as an additive to promote the formation of a stable SEI. [72][73][74] Then, the ionic conductivity of commercial and multicomponent electrolytes was studied over a range of temperatures. At room temperature (25°C), these electrolytes showed comparable Li diffusivity (Figure 2c and Supporting Information Figure S2).…”

Flatten the Li‐ion Activation in Perfectly Lattice‐Matched MXene and 1T‐MoS2 Heterostructures via Chemical Functionalization

“…A strong lattice and orbital coupling together with a wealth of polymorphs (semiconducting 2H phase and metallic 1T, 1T’ phases) also ensure MoS 2 for various applications. [ 25–35 ] Different from the semiconducting 2H‐MoS 2 , the 1T phase is less prone to capacity fading. [ 31,32,36 ] MXene/2H‐MoS 2 hybrid has been examined as the anode material of LIBs.…”

Tunable 0D/2D/2D Nanocomposite Based on Green Zn-Doped CuInS2 Quantum Dots and MoS2/rGO as Photoelectrodes for Solar Hydrogen Production

“…37-1492). The (002) reflection at 13.9° is indicative of the layered structure of MoS 2 . The intense and sharp diffraction peak of GO at 10.0°, corresponding to the (001) crystal plane, disappears in the MG nanocomposite, revealing the reduction of GO during the hydrothermal process.…”