title: Controlled Growth of Li2O2by Cocatalysis of Mobile Pd and Co3O4Nanowire Arrays for High-Performance Li-O2Batteries.
abstract: For Li-O2batteries, a challenge still remains to achieve high discharge capacity and easy decomposition of the discharge product (Li2O2) simultaneously. In this work, conformal growth of thin-layered Li2O2on Co3O4nanowire arrays (Co3O4NAs) during discharge is realized through the cocatalytic effect of solid/immobile Co3O4NAs and mobile Pd nanocrystals (Pd NCs), rendering easy decomposition of Li2O2during recharge. Meanwhile, high discharge capacity is also ensured with unique array-type design of the catalytic cathode despite the surface growth mode of Li2O2. The Li-O2cells can deliver a high discharge capacity of 5337 mAh g-1and keep a stable cycling of 258 cycles at a limited capacity of 500 mAh g-1. The achievement of excellent electrochemical performance is attributed to the highly efficient cocatalytic ability of Co3O4NAs and Pd NCs as well as the desirable array-type architecture of the catalytic electrode free of carbon and binder. The cocatalytic mechanism of Co3O4NAs and Pd NCs is clarified by systematic electrochemical tests, microstructural analyses, and ζ-potential measurements.
authors: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors: Can
authors: C
authors: Cao
authors: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors: Yucong
authors: Y
authors: Yan
authors: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.
authors: Hui
authors: H
authors: Zhang
authors: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.|Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province , Hangzhou 310027, China.
authors: Jian
authors: J
authors: Xie
authors: School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics , Beijing 100191, China.
authors: Shichao
authors: S
authors: Zhang
authors: Industrial Technology Research Institute of Zhejiang University , Hangzhou 310058, China.
authors: Bin
authors: B
authors: Pan
authors: Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province , Hangzhou 310027, China.
authors: Gaoshao
authors: G
authors: Cao
authors: State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University , Hangzhou 310027, China.|Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province , Hangzhou 310027, China.
authors: Xinbing
authors: X
authors: Zhao
keywords: binder/carbon free; cobalt oxide arrays; cocatalysis; controlled Li2O2 growth; lithium−oxygen batteries; palladium nanocrystals