TY - JOUR
T1 - Oxide ionic and electronic conduction in Ni-doped LaGaO3-based oxide
AU - Ishihara, Tatsumi
AU - Ishikawa, Shinji
AU - Hosoi, Kei
AU - Nishiguchi, Hiroyasu
AU - Takita, Yusaku
N1 - Funding Information:
The authors acknowledge the financial support from Grant-in-Aid for Science Promotion (No. 11102006) from Ministry of Education, Culture, Sports, Science and Technology.
PY - 2004/11/30
Y1 - 2004/11/30
N2 - Partial electronic conduction in Ni-doped LaGaO3-based oxide was investigated by using the ion-blocking method. It was seen that the hole and the electronic conduction originated from doped Ni becomes dominant with decreasing temperature and also with increasing Ni content. PO2 dependences of hole and electronic conduction decrease with increasing Ni content and it becomes almost PO2-1-12 and P O2-1/12, respectively, at 1073 K when 10 mol% Ni is doped to Ga site. The estimated transport number of oxide ion in Ni-doped LaGaO 3 is always higher than 0.95 in PO2 range from 1 to 10-21 atm, which is the important PO2 range for fuel cell application. Therefore, the main charge carrier is still oxide ion in Ni-doped LaGaO3- Comparing with the partial electronic conduction in Co-doped sample, the electrolyte domain is wider on Ni-doped sample.
AB - Partial electronic conduction in Ni-doped LaGaO3-based oxide was investigated by using the ion-blocking method. It was seen that the hole and the electronic conduction originated from doped Ni becomes dominant with decreasing temperature and also with increasing Ni content. PO2 dependences of hole and electronic conduction decrease with increasing Ni content and it becomes almost PO2-1-12 and P O2-1/12, respectively, at 1073 K when 10 mol% Ni is doped to Ga site. The estimated transport number of oxide ion in Ni-doped LaGaO 3 is always higher than 0.95 in PO2 range from 1 to 10-21 atm, which is the important PO2 range for fuel cell application. Therefore, the main charge carrier is still oxide ion in Ni-doped LaGaO3- Comparing with the partial electronic conduction in Co-doped sample, the electrolyte domain is wider on Ni-doped sample.
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U2 - 10.1016/j.ssi.2004.03.036
DO - 10.1016/j.ssi.2004.03.036
M3 - Conference article
AN - SCOPUS:10044241825
VL - 175
SP - 319
EP - 322
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - 1-4
T2 - Fourteenth International Conference on Solid State Ionics
Y2 - 22 June 2003 through 27 June 2003
ER -