title: Toward Highly Efficient Electrocatalyst for Li-O2Batteries Using Biphasic N-Doping Cobalt@Graphene Multiple-Capsule Heterostructures.
abstract: For the promotion of lithium-oxygen batteries available for practical applications, the development of advanced cathode catalysts with low-cost, high activity, and stable structural properties is demanded. Such development is rooted on certain intelligent catalyst-electrode design that fundamentally facilitates electronic and ionic transport and improves oxygen diffusivity in a porous environment. Here we design a biphasic nitrogen-doped cobalt@graphene multiple-capsule heterostructure, combined with a flexible, stable porous electrode architecture, and apply it as promising cathodes for lithium-oxygen cells. The biphasic nitrogen-doping feature improves the electric conductivity and catalytic activity; the multiple-nanocapsule configuration makes high/uniform electroactive zones possible; furthermore, the colander-like porous electrode facilitates the oxygen diffusion, catalytic reaction, and stable deposition of discharge products. As a result, the electrode exhibits much improved electrocatalytic properties associated with unique morphologies of electrochemically grown lithium peroxides.
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Tan
authors.forename: Lina
authors.initials: L
authors.lastname: Chong
authors.forename: Rachid
authors.initials: R
authors.lastname: Amine
authors.forename: Jun
authors.identifier: 0000-0003-0858-8577
authors.initials: J
authors.lastname: Lu
authors.forename: Cong
authors.initials: C
authors.lastname: Liu
authors.forename: Yifei
authors.initials: Y
authors.lastname: Yuan
authors.affiliation: Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Wen
authors.forename: Kun
authors.initials: K
authors.lastname: He
authors.forename: Xuanxuan
authors.initials: X
authors.lastname: Bi
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Guo
authors.forename: Hsien-Hau
authors.initials: HH
authors.lastname: Wang
authors.forename: Reza
authors.identifier: 0000-0002-7744-4780
authors.initials: R
authors.lastname: Shahbazian-Yassar
authors.forename: Said
authors.initials: S
authors.lastname: Al Hallaj
authors.affiliation: Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States.
authors.forename: Dean J
authors.initials: DJ
authors.lastname: Miller
authors.forename: Dijia
authors.initials: D
authors.lastname: Liu
authors.forename: Khalil
authors.identifier: 0000-0001-9206-3719
authors.initials: K
authors.lastname: Amine
keywords: MOF; N-doped graphene; cathode catalyst; cobalt nitride; lithium−oxygen battery