Facile synthesis of crumpled nitrogen-doped carbon/molybdenum disulfide hybrid sheets as high-rate anodes for lithium-ion batteries

초록

To address the demand for high-rate anodes for lithium ion batteries, herein, crumpled MoS2/nitrogen-doped carbon hybrid sheets (CMNCS) were synthesized via a modified mix-bake-wash method. Material characterization proved that CMNCS comprised sheets with few-layer thickness that were composed of homogenously distributed MoS2 and N-doped carbon matrix with numerous mesopores. CMNCS offers the morphological advantage of 3D interconnected electron pathways and an enlarged ionic contact area for improving the rate performance. Furthermore, the N-doped carbon matrix in CMNCS plays a role in enhancing the electrical conductivity as well as suppressing volume changes during cycling. The CMNCS demonstrated a reversible discharge capacity of 264 mAh g−1 at 10 A g−1 and a stable cycle life with a discharge capacity of 324.2 mAh g−1 and coulombic efficiency of 99.7%, even after the 1000th cycle at 4 A g−1. These results indicate that CMNCS offers great potential as an anode material for lithium ion batteries that require high current and stable cycle life.

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