Honeycomb substrate carbon and nitrogen-doped coated carbon synergistically boost SnS/ZnS for efficient lithium storage

Abstract

Metal sulfide has become an important anode electrode material for lithium-ion batteries due to its high theoretical specific capacity and low cost. In this work, nano-SnS/ZnS grown on a honeycomb substrate carbon were coated with nitrogen-doped carbon (EG@SnS@ZnS@N-C) by solvothermal and in situ thermal decomposition/sulfide reactions. Honeycomb carbon with good electrical conductivity and mechanical mechanism is loaded with SnS and ZnS with synergistic effects, combined with nitrogen-doped porous carbon with enhanced ion transport. These unique designs enable EG@SnS@ZnS@N-C to exhibit excellent lithium storage performance with a specific capacity of 880 mAh/g at 0.1 A/g and capacity retention of 98% after 100 cycles.