title: Advanced Sulfur Cathode Enabled by Highly Crumpled Nitrogen-Doped Graphene Sheets for High-Energy-Density Lithium-Sulfur Batteries.
abstract: Herein, we report a synthesis of highly crumpled nitrogen-doped graphene sheets with ultrahigh pore volume (5.4 cm(3)/g) via a simple thermally induced expansion strategy in absence of any templates. The wrinkled graphene sheets are interwoven rather than stacked, enabling rich nitrogen-containing active sites. Benefiting from the unique pore structure and nitrogen-doping induced strong polysulfide adsorption ability, lithium-sulfur battery cells using these wrinkled graphene sheets as both sulfur host and interlayer achieved a high capacity of ∼1000 mAh/g and exceptional cycling stability even at high sulfur content (≥80 wt %) and sulfur loading (5 mg sulfur/cm(2)). The high specific capacity together with the high sulfur loading push the areal capacity of sulfur cathodes to ∼5 mAh/cm(2), which is outstanding compared to other recently developed sulfur cathodes and ideal for practical applications.
authors.affiliation: Department of Mechanical and Nuclear Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Jiangxuan
authors.initials: J
authors.lastname: Song
authors.affiliation: Department of Mechanical and Nuclear Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Yu
authors.affiliation: Department of Mechanical and Nuclear Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Mikhail L
authors.initials: ML
authors.lastname: Gordin
authors.affiliation: Department of Mechanical and Nuclear Engineering, The Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors.forename: Donghai
authors.initials: D
authors.lastname: Wang
mesh_terms: D000818:Animals; D004195:Disease Models, Animal; D004553:Electric Conductivity; D011211:Electric Power Supplies; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D006614:Hindlimb; D006801:Humans; D007511:Ischemia; D008094:Lithium / Q000737:chemistry*; D051379:Mice; D009584:Nitrogen / Q000737:chemistry; D051381:Rats; D013455:Sulfur / Q000737:chemistry*
chemical_list: D013455:Sulfur; D006108:Graphite; D008094:Lithium; D009584:Nitrogen
keywords: Lithium−sulfur batteries; crumpled graphene; high areal capacity; high sulfur content; nitrogen-doped graphene