Ni–Fe–Ce(Mn,Fe)O2 cermet anode for rechargeable Fe–Air battery using LaGaO3 oxide ion conductor as electrolyte
Ni–Fe–Ce(Mn,Fe)O2 cermet anode for rechargeable Fe–Air battery using LaGaO3 oxide ion conductor as electrolyte
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DOI：
10.1039/c2ra23370c
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发表时间：
2013-02
期刊：
影响因子：
3.9
通讯作者：
Atsushi Inoishi;S. Ida;Shouichi Uratani;Takayuki Okano;T. Ishihara
中科院分区：
文献类型：
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作者：
Atsushi Inoishi;S. Ida;Shouichi Uratani;Takayuki Okano;T. Ishihara
各领域对大容量充电电池的发展有着强烈的需求。最近，我们提出了将固体氧化物燃料电池技术与铁-空气电池概念相结合，以H2/H2O为氧化还原介质，以LaGaO_3基氧化物为电解液。由于负极具有较大的内阻和充放电循环过程中的退化，因此对提高放电电位和循环稳定性有很大的需求。这项研究调查了金属陶瓷阳极的使用，该阳极由镍铁合金和氧化物离子导体组成。采用Ni-Fe金属陶瓷负极和Ce0.6Mn0.3Fe0.1O2(CMF)，在10 mA cm−2和873K下，电池的观察容量提高到1163mAhg−1 Fe−1，约为假设形成Fe3O4(1200mAhg−1 Fe−1)的理论容量的97%。与使用Ni-Fe阳极相比，使用Ni-Fe-CMF阳极可以显著提高电池的循环稳定性，这是因为Ni与CMF的混合提供了抑制聚集的作用。
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 g−1 Fe−1 at 10 mA cm−2 and 873 K. This is about 97% of the theoretical capacity by assuming the formation of Fe3O4 (1200 mAh g−1 Fe−1). 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.