Detail Inovasi Perguruan Tinggi

Tema: Teknik Elektro
Judul: Magnetic field effect on the electrochemical performance of La0. 7Sr0. 3MnO3-0 cathodes
Perguruan Tinggi: Universitas Katolik Parahyangan
Jenis/sdm: dosen/0422078604

Tahun: 2016

La0.7La0.7Sr0.3Sr0.3MnO3δMnO3−δ (LSM) magnetic properties are exploited through the application of a magnetic field, resulting in a significant decrease of the cathode polarization resistance, a crucial component of high temperature solid oxide fuel cells. The magnetic field is applied during the drying process after the deposition of LSM cathodes by screen-printing on a Gd0.1Gd0.1Ce0.9Ce0.9O1.95O1.95 (GDC) electrolyte. This specific process aims to decrease the cathode polarization resistance of solid oxide fuel cells. X-ray diffraction patterns show a structural modification triggered by the magnetic field. LSM cathode performance is investigated over a temperature range of 700–800 °C by impedance spectroscopy. The measured electrode area specific resistance (ASR) of a LSM/GDC/LSM symmetric half-cell without and with magnetic field was 0.30 ΩΩ cm2 and 0.20 ΩΩ cm2, respectively, at 800 °C. The ASR value was therefore decreased by 33% with the magnetic field effect. This behaviour may be attributed to LSM grain reorientation, microstructure change, and tortuosity modification of LSM cathodes.
The authors wish to gratefully acknowledge the Region Nord-Pas de Calais for financial support.