Ruddlesden-Popper phases are layered oxides composed of nABO(3) perovskite layers sandwiched between two AO rock-salt layers. Herein a new composition of n = 3 Ruddlesden-Popper phases, La2Pr2Ni3O10 (+/-) (delta), synthesised by the citrate sol-gel method is reported. A preliminary microstructure investigation combined with studies of the electrochemical performance of this new composition, La2Pr2Ni3O10 (+/-) (delta) as a potential cathode material in both symmetrical and single cell configurations is reported. The area specific resistance of the La2Pr2Ni3O10 (+/-) (delta) cathode was found to be 0.34 Omega cm(2) at 800 degrees C, which is significantly better than previous reports for the La2Pr2Ni3O10 (+/-) (delta) analogue under similar conditions. A modest peak power density of 0.19 W cm(-2) at 800 degrees C was found, whilst electrode adhesion was identified as contributing to the modest performance.