Carbon supported TiN nanoparticles: an efficient bifunctional catalyst for non-aqueous Li–O2 batteries

Fujun Li; Ryohji Ohnishi; Yuki Yamada; Jun Kubota; Kazunari Domen; Atsuo Yamada; Haoshen Zhou

doi:10.1039/C2CC37042E

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Chemical Communications

Issue 12, 2013

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Carbon supported TiN nanoparticles: an efficient bifunctional catalyst for non-aqueous Li–O₂ batteries

Fujun Li,^a^b Ryohji Ohnishi,^b Yuki Yamada,^b Jun Kubota,^b Kazunari Domen,^b Atsuo Yamada*^b and Haoshen Zhou*^a^b

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Corresponding authors

Institute of Energy Technology, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Japan
E-mail: hs.zhou@aist.go.jp

Department of Engineering, The University of Tokyo, Building 5-607, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
E-mail: yamada@chemsys.t.u-tokyo.ac.jp

Chem. Commun., 2013,49, 1175-1177

DOI: 10.1039/C2CC37042E
Received 28 Sep 2012, Accepted 08 Nov 2012
First published online 08 Nov 2012

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A Li–O₂ battery with TiN nanoparticles supported on Vulcan XC-72, n-TiN/VC, as the cathode catalyst presented an onset potential for the oxygen evolution reaction (OER) at 2.9 V, contrasting with a mixture of micro-sized TiN and VC (m-TiN/VC), and VC, both at [similar] 3.1 V. The discharge–recharge voltage gap of n-TiN/VC was estimated to be 1.05 V, which is 390 and 450 mV smaller than that of m-TiN/VC and VC, respectively, at 50 mA g_carbon⁻¹. These indicate that n-TiN/VC can function as both an active ORR catalyst during discharge and an efficient OER catalyst during recharge.