Nd2-xInxCe2O7　(x　=　0,　0.05,　0.10,　0.15　and　0.20)　powders　are　successfully　synthesized　by　citric　acid-nitrate　sol-gel　combustion　method.　The　influence　of　In　doping　on　the　phase　structure,　morphology,　and　electrical　conduction　behavior　of　neodymium　cerium　is　characterized　by　X-ray　diffraction,　Raman　spectroscopy,　scanning　electron　microscopy　and　electrochemical　impedance　spectroscopy.　All　Nd2-xInxCe2O7　ceramics　are　found　to　possess　a　fluorite-type　structure.　Moreover,　Nd1.85In0.15Ce2O7　pellets　keep　sufficiently　excellent　chemical　stability　under　different　atmospheres　containing　CO2,　water　and　wet　hydrogen.　Highly　dense　ceramics　with　increasing　grain　size　are　obtained　by　sintering　at　reduced　temperature　resulting　from　indium　incorporation　promotes　sinterability　of　Nd2-xInxCe2O7.　The　Nd1.85In0.15Ce2O7　pellet　promises　the　highest　total　conductivities　of　0.75　×　10−2　and　2.07　×　10−2　S　cm-1　at　700　°C　in　dry　air　and　wet　5%　H2-Ar　conditions,　respectively.　Furthermore,　an　anode-supported　single　cell　with　dense　Nd1.85In0.15Ce2O7　electrolyte　film　is　successfully　assembled　and　evaluated.　The　maximum　power　density　of　the　cell　reaches　743　mW　cm-2　at　700　°C.　The　results　indicate　that　In-doped　Nd2Ce2O7　is　a　promising　candidate　as　a　proton-conducting　electrolyte　for　intermediate-temperature　solid　oxide　fuel　cells.　©　2018　Elsevier　B.V.