title: A Carbon- and Binder-Free Nanostructured Cathode for High-Performance Nonaqueous Li-O2Battery.
abstract: Operation of the nonaqueous Li-O2battery critically relies on the reversible oxygen reduction/evolution reactions in the porous cathode. Carbon and polymeric binder, widely used for the construction of Li-O2cathode, have recently been shown to decompose in the O2environment and thus cannot sustain the desired battery reactions. Identifying stable cathode materials is thus a major current challenge that has motivated extensive search for noncarbonaceous alternatives. Here, RuOx/titanium nitride nanotube arrays (RuOx/TiN NTA) containing neither carbon nor binder are used as the cathode for nonaqueous Li-O2batteries. The free standing TiN NTA electrode is more stable than carbon electrode, and possesses enhanced electronic conductivity compared to TiN nanoparticle bound with polytetrafluoroethylene due to a direct contact between TiN and Ti mesh substrate. RuOxis electrodeposited into TiN NTA to form a coaxial nanostructure, which can further promote the oxygen evolution reaction. This optimized monolithic electrode can avoid the side reaction arising from carbon material, which exhibits low overpotential and excellent cycle stability over 300 cycles. These results presented here demonstrate a highly effective carbon-free cathode and further imply that the structure designing of cathode plays a critical role for improving the electrochemical performance of nonaqueous Li-O2batteries.
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China; College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China.
authors.forename: Yueqi
authors.initials: Y
authors.lastname: Chang
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China.
authors.forename: Shanmu
authors.initials: S
authors.lastname: Dong
authors.affiliation: Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China.
authors.forename: Yuhang
authors.initials: Y
authors.lastname: Ju
authors.affiliation: Institute of Physics Chinese Academy of Sciences Beijing 100080 P. R. China.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Xiao
authors.affiliation: College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China.
authors.forename: Xinhong
authors.initials: X
authors.lastname: Zhou
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China.
authors.forename: Lixue
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Chen
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China.
authors.forename: Chaoqun
authors.initials: C
authors.lastname: Shang
authors.affiliation: Institute of Physics Chinese Academy of Sciences Beijing 100080 P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China.
authors.forename: Zhangquan
authors.initials: Z
authors.lastname: Peng
authors.affiliation: Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Qingdao 266101 P. R. China.
authors.forename: Guanglei
authors.initials: G
authors.lastname: Cui
keywords: RuOx; TiN nanotube arrays; carbon‐free cathode; nonaqueous Li–O2 batteries