||A. Inoishi, T. Omuta, Y. Yoshioka, E. Kobayashi, A. Kitajou, S. Okada, Single-Phase All-Solid-State Lithium-Ion Battery Using Li3V2(PO4)3 as the Cathode, Anode, and Electrolyte, Chemistry SELECT, 2, 7925-7929, 2017.09.
||A. Inoishi, Y. Yoshioka, L. ZHAO, A. Kitajou, S. Okada, Improvement in the energy density of Na₃V₂(PO₄)₃ by Mg substitution, ChemElectroChem, 10.1002/celc.201700540R1, 2017.08.
||A. Inoishi, T. Omuta, E. Kobayashi, A. Kitajou, S. Okada, A Single-Phase, All-Solid-State Sodium Battery Using Na3−xV2−xZrx(PO4)3 as the Cathode, Anode, and Electrolyte, Advanced Materials Interfaces, 10.1002/admi.201600942, 4, 1600942-1600946, 2017.03.
||A. Inoishi, J. Hyodo, H. Kim, T. Sakai, S. Ida, T. Ishihara, Low temperature operation of the solid-oxide Fe-air rechargeable battery using La0.9Sr0.1Ga0.8Mg0.2O3 oxide ion conductor, Journal of Materials Chemistry A, 3, 8260-8264, 2015.03.
||A. Inoishi, H. Kim, T. Sakai, Y. W. Ju, S. Ida, T. Ishihara, Discharge performance of Solid State Oxygen Shuttle Metal-Air Battery Using
Ca Stabilized ZrO2 Electrolyte, ChemSusChem, 8, 1264-1269, 2015.01.
||A. Inoishi, Matsuka Maki, T. Sakai, Y. W. Ju, S. Ida, T. Ishihara, Lithium–Air Oxygen Shuttle Battery with a ZrO2-Based Ion-Conducting Oxide Electrolyte, ChemPlusChem, 10.1002/cplu.201402041, in press, 2014.06.
||A. Inoishi, T. Sakai, Y. W. Ju, S. Ida, T. Ishihara, Effect of Ni/Fe ratio on the performance and stability of the Fe-air rechargeable battery using a La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte, International Journal of Hydrogen Energy, in press, 2014.07.
||A. Inoishi, T. Sakai, Y. W. Ju, S. Ida, T. Ishihara, Improved Cycle Stability of Fe-Air Solid State Oxide Rechargeable Battery Using LaGaO3-Based Oxide Ion Conductor, Journal of Power Sources, 262, 310-315, 2014.04.
||A. Inoishi, T. Sakai, Y. W. Ju, S. Ida, T. Ishihara, A Rechargeable Si-air Solid State Oxygen Shuttle Battery Incorporating an Oxide Ion Conductor , Journal of Materials Chemistry A, 1, 15212-15215, 2013.10.
||A. Inoishi, Y. W. Ju, S. Ida, T. Ishihara, Mg–air oxygen shuttle batteries using a
ZrO2-based oxide ion-conducting electrolyte, Chemical Communications, DOI: 10.1039/c3cc40880a, 49, 4961-4963, 2013.04, A new concept of an ‘‘oxygen shuttle’’ type battery for Mg–air
solid oxide batteries using a Ca-stabilized ZrO2 electrolyte was
proposed and studied. The observed open circuit potential and
discharge capacity were 1.81 V and 1154 mA h gMg
1 (52% of the
theoretical capacity), respectively..
||A. Inoishi, Y. Okamoto, Y. W. Ju, S. Ida, T, Ishihara, Oxidation Rate of Fe and Electrochemical Performance of Fe-air Rechargeable Battery using LaGaO3 based Oxide Ion Conductor, RSC advances, 10.1039/c3ra23337e, 3, 8820-8825, 2013.03, Effects of oxidation rate of Fe powder in Fe–air solid oxide rechargeable battery on discharge potential
and capacity were studied. From the measurement of PO2 in Fe set chamber and AC impedance for
electrode reaction, oxidation rate of Fe, i.e., formation rate of H2, was an important parameter for
discharge performance of Fe–air solid oxide battery. Slow oxidation rate of Fe, namely, low current density,
shows high discharge potential, however, caused sintering of Fe powder resulting in the decreased
discharge capacity and so decreased usage efficiency of Fe powder. On the other hand, larger capacity
(1145 mAh g21 Fe), which is close to the theoretical capacity, can be achieved at higher discharge rate of
30 mA cm22 at 873 K. Therefore, higher current density seems to be suitable for larger discharge capacity.
Concentration overpotential is negligibly small at initial stage of discharge, however, with discharge
period, diffusion overpotential became significantly enlarged caused by the slow oxidation rate of Fe.
Sintering of Fe powder was observed after discharge at 5 mA cm22 by SEM and TEM observations and so
fast oxidation rate at larger current density can be assigned to bulk oxidation of Fe powder with small
particle size sustained during discharge..
||A. Inoishi, S. Uratani, T. Okano, S. Ida, T. Ishihara, Ni–Fe–Ce(Mn,Fe)O2 cermet anode for rechargeable Fe–
Air battery using LaGaO3 oxide ion conductor as
electrolyte, RSC advances, 10.1039/c2ra23370c, 3, 3024-3030, 2012.12, There is a strong demand for the development of a large capacity rechargeable battery in various fields.
Recently, we proposed the combination of solid oxide fuel cell technology with Fe–air battery concepts
using H2/H2O as a redox mediator and a LaGaO3-based oxide as an electrolyte. Because large internal
resistance and large degradation during charge and discharge cycles were observed on the anode, there is
a strong demand for improvements in discharge potential and cycle stability. This study investigates the
use of a cermet anode consisting of a Ni–Fe alloy combined with an oxide ion conductor. It was observed
that by using a cermet anode of Ni–Fe combined with Ce0.6Mn0.3Fe0.1O2 (CMF), the observed capacity of
the cell was improved to 1163 mAh g21 Fe21 at 10 mA cm22 and 873 K. This is about 97% of the
theoretical capacity by assuming the formation of Fe3O4 (1200 mAh g21 Fe21). Cycle stability of the cell
was also considerably improved with the use of a Ni–Fe–CMF anode compared to a Ni–Fe anode because
of the suppressed aggregation provided by the mixing of Ni with CMF..
||A. Inoishi, Y. W. Ju, S. Ida, T. Ishihara, Fe-air rechargeable battery using oxide ion conducting electrolyte of Y2O3 stabilized ZrO2, Journal of Power Sources, 229, 12-15, 2012.12, Solid oxide fuel cell concept was applied for Feeair rechargeable battery by using H2/H2O as a mediator
for Fe redox. Oxygen partial pressure in Fe set chamber during discharge was monitored simultaneously
with O2 sensor for analysis of discharge mechanism. On the cell consisting of Pt anode, Y2O3 stabilized
ZrO2(YSZ) electrolyte, and Pt cathode, 10 cycles of charge and discharge was stably performed, although
decrease in capacity was observed at initial cycle. Oxygen partial pressure ðPO2
Þ was monitored by
zirconia oxygen sensor which is used for Fe set chamber. Simultaneous monitoring the oxygen partial
pressure during the charge and discharge, the reasonable response of PO2 in Fe set chamber was observed
and for discharge, Fe seems to be oxidized to FeO and reduction to Fe was also confirmed. Impedance
plots suggested that degradation could be assigned to the increased diffusion overpotential because of
the decreased oxidation rate of Fe powder. However, after second cycles, internal resistance of the cell
was stable up to 10 cycles examined. Therefore, application of SOFC concept and H2/H2O redox mediator
is successfully demonstrated for the Feeair rechargeable battery..
||A. Inoishi, S. Uratani, T. Okano, S. Ida, T. Ishihara, High capacity of an Fe–air rechargeable battery using LaGaO3-based
oxide ion conductor as an electrolyte, Physical Chemistry Chemical Physics, 10.1039/c2cp42166f, 14, 12819-12822, 2012.07, Rapid growth and improved functions of mobile equipment present the need for an advanced
rechargeable battery with extremely high capacity. In this study, we investigated the application
of fuel cell technology to an Fe–air rechargeable battery. Because the redox potential of Fe is
similar to that of H2, the combination of H2 formation by the oxidation of Fe with a fuel cell has
led to a new type of metal–air rechargeable battery. By decreasing the operating temperature, a
deep oxidation state of Fe can be achieved, resulting in enlarged capacity of the Fe–air battery.
We found that the metal Fe is oxidized to Fe3O4 by using H2/H2O as mediator. The observed
discharge capacity is 817 mA h g1-Fe, which is approximately 68% of the theoretical capacity
of the formation of Fe3O4, 1200 mA h g1-Fe, at 10 mA cm2 and 873 K. Moreover, the
cycle stability of this cell is examined. At 1073 K, the cell shows a discharge capacity of
ca. 800 mA h g1-Fe with reasonably high discharge capacity sustained over five cycles..