General Synthesis of Sulfonate‐Based Metal–Organic Framework Derived Composite of M<sub><i>x</i></sub>S<sub><i>y</i></sub>@N/S‐Doped Carbon for High‐Performance Lithium/Sodium Ion Batteries
Lin Chen, Lijing Han, Xingjiang Liu, Yafeng Li, Mingdeng Wei
Abstract
Abstract A general and simple strategy is realized for the first time for the preparation of metal sulfide (M x S y ) nanoparticles immobilized into N/S co‐doped carbon (NSC) through a one‐step pyrolysis method. The organic ligand 1,5‐naphthalenedisulfonic acid in the metal–organic framework (MOF) precursor is used as a sulfur source, and metal ions are sulfurized in situ to form M x S y nanoparticles, resulting in the formation of M x S y /NSC (M=Fe, Co, Cu, Ni, Mn, Zn) composites. Benefiting from the M x S y nanoparticles and conductive carbon, a synergistic effect of the composite is achieved. For instance, the composite of Fe 7 S 8 /NSC as an anode displays excellent long‐term cycling stability in lithium/sodium ion batteries. At 5 A g −1 , large capacities of 645 mA h g −1 and 426.6 mA h g −1 can be retained after 1500 cycles for the lithium‐ion battery and after 1000 cycles for the sodium‐ion battery, respectively.