MoS2 Anchored on Agar‐Derived 3D Nitrogen‐Doped Porous Carbon for Electrocatalytic Hydrogen Evolution Reaction and Lithium‐Ion Batteries

摘要

Abstract MoS2 has been explored as a potential material for hydrogen evolution reaction (HER) and lithium‐ion batteries (LIBs). However, the limited number of active sites and poor conductivity restrain its applications. Herein, a facile method is reported to construct MoS2 nanosheets (MoS2 NSs) grown on agar‐derived 3D nitrogen‐doped porous carbon (MoS2‐NPC). The as‐prepared MoS2‐NPC composite exhibits good stability and HER electrocatalytic properties with a low overpotential of 209 mV at 10 mA cm−2 and a small Tafel slope of 41 mV dec−1. Furthermore, as an anode of LIBs, it delivers an initial discharge capacity of 1289 mAh g−1 at 0.1 A g−1 and rate capability of 712 and 419 mAh g−1 at 0.5 and 2.0 A g−1, respectively. This is attributed to the synergistic effects and unique 3D network structure, which avoids the aggregation of MoS2 and results in more exposed active sites. The agar‐derived 3D nitrogen‐doped porous carbon can act as a support material for MoS2 NSs dispersed on the surface, providing a cheap and efficient strategy to prepare high quality catalysts for electrochemical energy conversion and storage applications.