In recent years, the Reversible Solid Oxide Cells (RSOCs) are regarded as direct energy converters between hydrogen and electricity. The proton conducting oxides proposed as electrolyte materials for RSOCs have several advantages. Perovskite type oxides CaZr0.9In0.1O3-delta (CZI) are known as high temperature proton conductors with high chemical stability and mechanical properties. In this paper, Ni-CZI electrode supported tubular single cells with CZI thin film electrolyte are fabricated for the first time. Composite air electrodes with La0.6Sr0.4CoO3 (LSC) nano-particles impregnated into porous CZI matrix are applied to improve the electrochemical performance. Three single cells with different LSC impregnation loadings are tested and compared. The modified single cell achieves hydrogen production rate of 2.1 mL.min(-1)cm(-2) at 1.3 V and 850 degrees C. After the initial 18% performance degradation, the cell performance almost kept constant in 3 SOEC-SOFC cycles. All these results show the potential application of CZI materials and electrode supported tubular structure for RSOCs. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.