Kyushu University · Engineering
Professor Atsushi Inoishi's research lab specializes in advanced energy storage systems, with a primary focus on solid oxide-based rechargeable batteries. The lab explores innovative concepts such as metal-air batteries using iron, magnesium, and silicon as anodes, leveraging oxide ion conductors and oxygen shuttle mechanisms for high-capacity, stable operation at elevated temperatures. Key research directions include optimizing redox mediators like H₂/H₂O, developing cermet anodes (e.g., Ni–Fe with CMF), and enhancing interfacial stability to improve cycle life and energy efficiency. The lab integrates materials chemistry, electrochemistry, and solid-state ionics to design next-generation all-solid-state batteries with high theoretical capacity and practical durability.
Figures are computed from collected data and may differ slightly.
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 H(2), the combination of H(2) 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 sta
“Single-phase” all-solid-state battery, based on Na3−xV2−xZrx(PO4)3 as the cathode, anode, and electrolyte, is reported. It successfully undergoes room temperature charge–discharge reactions based on the V3+/V2+ (anode) and V3+/V4+ (cathode) redox systems with insertion reaction. The interfacial resistance is essentially zero at the anode and cathode. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed an
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.
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
Herein, we report a new type of Si–air rechargeable battery incorporating an oxide ion conducting electrolyte, based on the oxygen shuttle concept. A cell designed in this manner and employing Ca stabilized ZrO2 exhibited stable charge–discharge over 20 cycles at 1073 K and achieved a discharge capacity of approximately 600 mA h gSi−1.
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 dec
Abstract Chloride‐ion batteries have some attractive properties such as high energy density and low cost. However, they have poor cycle performance because chloride as an active material tends to dissolve into a polar solvent. Herein, an all‐solid‐state chloride‐ion battery is demonstrated with KCl‐doped PbCl 2 as a solid electrolyte to suppress the dissolution of chloride. The all‐solid‐state cell with BiCl 3 as the cathode had an initial discharge capacity of 187 mAh g −1 , which corresponds t
Abstract To realize an ideal interface between electrode and electrolyte, a single‐phase all‐solid‐state lithium‐ion battery is studied using Li 3 V 2 (PO 4 ) 3 ‐based NASICON‐type material as the cathode, anode, and electrolyte. A dense Li 3‐x V 2‐x Al x (PO 4 ) 3 pellet with the Pt current collectors on both the front and back surfaces successfully demonstrates charge‐discharge reactions based on the V 3+ /V 2+ (anode) and V 3+ /V 4+ (cathode) redox systems at 373 K. Al substitutional doping f
All-solid-state Li batteries have attracted significant attention because of their high energy density and high level of safety. In a solid-state Li-ion battery, the electrodes contain a solid electrolyte that does not contribute directly to the capacity. Therefore, a battery that does not require a solid electrolyte in its electrode mixture should exhibit a higher energy density. In this study, a MgH<sub>2</sub> electrode was used as the negative electrode material without a solid electrolyte i
We investigated a catalyst for oxidation of Fe powder using steam and it was applied to a Fe–air rechargeable battery based on the low temperature operating Solid Oxide Fuel Cells technology.
We report a battery made from a single material using Li<sub>1.5</sub>Cr<sub>0.5</sub>Ti<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub> as the anode, cathode and electrolyte. A high rate capability at room temperature and very low-temperature operation (233 K) were possible as a result of the superior ionic conductivity and low interfacial resistance obtained from the single-phase cell design.
Fluoride batteries are attracting intensive attention because they can provide a higher energy density than conventional lithium‐ion batteries. Among various metal fluorides, FeF 3 is a promising candidate for the cathode material of fluoride batteries because of its high theoretical capacity. In this report, the reversibility of an FeF 3 cathode is investigated in conjunction with fluorite‐type Ba 0.6 La 0.4 F 2.4 as the electrolyte and Pb as the counter‐electrode material. For the first time,
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