Ammonia‐Treated Ordered Mesoporous Carbons with Hierarchical Porosity and Nitrogen‐Doping for Lithium‐Sulfur Batteries

Abstract Developed porosity and high‐level heteroatom‐doping are necessary to acquire the advanced carbon materials as sulfur hosts for lithium‐sulfur batteries with high sulfur loading. We herein demonstrated that hierarchical ordered micro/mesoporous carbons with controllable porosity and nitrogen functionality could be prepared via two scalable steps which are based on aqueous self‐assembly and ammonia activation processes. The effects of porosity and nitrogen doping upon the electrochemical performances of the carbon/sulfur hybrids as the cathodes in lithium‐sulfur batteries were investigated. It demonstrated that the carbon materials with balanced porosity and nitrogen‐doping level could effectively increase the conductivity of sulfur and alleviate the “shuttle effect” and exhibit high specific capacity, good rate performance, and superior cycling stability.