title: ε-MnO2 nanostructures directly grown on Ni foam: a cathode catalyst for rechargeable Li-O2 batteries.
abstract: A sponge-like ε-MnO2 nanostructure was synthesized by direct growth of ε-MnO2 on Ni foam through a facile electrodeposition route. When applied as a self-supporting, binder-free cathode material for rechargeable nonaqueous lithium-oxygen batteries, the ε-MnO2/Ni electrode exhibits considerable high-rate capability (discharge capacity of ∼6300 mA h g(-1) at a current density of 500 mA g(-1)) and enhanced cyclability (exceeding 120 cycles) without controlling the discharge depth. The superior performance is proposed to be associated with the 3D nanoporous structures and abundant oxygen defects as well as the absence of side reactions related to carbon-based conductive additives and binders.
authors.affiliation: Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China. fycheng@nankai.edu.cn chenabc@nankai.edu.cn.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: Hu
authors.forename: Xiaopeng
authors.initials: X
authors.lastname: Han
authors.forename: Yuxiang
authors.initials: Y
authors.lastname: Hu
authors.forename: Fangyi
authors.initials: F
authors.lastname: Cheng
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D011211:Electric Power Supplies; D055664:Electrochemical Techniques; D004566:Electrodes; D008094:Lithium / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D058608:Nanopores / Q000648:ultrastructure; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*
chemical_list: D017895:Manganese Compounds; D010087:Oxides; C027424:manganese oxide; D009532:Nickel; D008094:Lithium; D010100:Oxygen