Functional semiconductor–ionic composite GDC–KZnAl/LiNiCuZnOx for single-component fuel cell
Functional semiconductor–ionic composite GDC–KZnAl/LiNiCuZnOx for single-component fuel cell
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DOI：
10.1039/c3ra47783e
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发表时间：
2014-02
期刊：
影响因子：
3.9
通讯作者：
B. Zhu;L. Fan;Yufeng Zhao;W. Tan;D. Xiong;Hao Wang
中科院分区：
文献类型：
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作者：
B. Zhu;L. Fan;Yufeng Zhao;W. Tan;D. Xiong;Hao Wang
单组分燃料电池(SCFC)的研究活动为保持领先地位打开了新的大门，主要集中在两个主要领域：通过贡献新材料来提高SCFC的性能，以及科学地理解SCFC的性质和运行模式。本文报道了利用Gd掺杂CeO_2-KAlZn-氧化物(GDC-KAZ)和LiNiCuZn-氧化物(LNCZ)组成的兼具离子和半导体性能的SCFC新材料的开发。首次使用了一种新的方法，通过内部电子-空穴氧化还原循环导致没有净电子，从而避免了CeO2电子传导问题，从而开发出了性能优良的GDC-KAZ电解液。在600℃时，其离子电导率为0.08 S cm−1，是GDC的10倍。使用GDC-KAZ-LNCZ材料制成的超临界燃料电池在580℃时的电化学性能为628mW cm−2，显著高于传统的三组分(阳极/电解液/阴极)燃料电池。这一结果为燃料电池领域带来了一种新的具有成本效益和健壮性的系统，具有重大的科学和经济意义。
The research activities on single-component fuel cells (SCFCs) have opened new doors for keeping ahead with two major areas of focus: improvement of SCFC performances by contributing new materials, and scientific understanding of the SCFC nature and operation mode. The present work reports the exploitation of new material composed of the Gd doped ceria-KAlZn-oxide (GDC–KAZ) and the LiNiCuZn-oxide (LNCZ), combining ionic and semiconducting properties for SCFCs. A new method is first used through an internal electron–hole redox cycle resulting in no net electrons to avoid ceria electronic conduction problems thus to develop an excellent GDC–KAZ electrolyte. Its ionic conductivity, 0.08 S cm−1 at 600 °C, is ten times higher than that of GDC. The SCFC using the GDC–KAZ–LNCZ materials exhibits a remarkable electrochemical performance of 628 mW cm−2 at 580 °C, significantly higher than that of conventional three-component (anode/electrolyte/cathode) fuel cells. The results bring about a new cost-effective and robust system with significant scientific and economic consequences for the fuel cell field.