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DOI | 10.1126/science.aaz9139 |
Proton transport enabled by a field-induced metallic state in a semiconductor heterostructure | |
Y. Wu; B. Zhu; M. Huang; L. Liu; Q. Shi; M. Akbar; C. Chen; J. Wei; J. F. Li; L. R. Zheng; J. S. Kim; H. B. Song | |
2020-07-10 | |
发表期刊 | Science
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出版年 | 2020 |
英文摘要 | The operating temperatures of solid oxide fuel cells are usually much higher than needed to drive the uncatalyzed electrochemical reaction to transport oxygen anions or protons through ceramic electrolytes. Wu et al. report that the interface between two semiconductors, NaxCoO2 and CeO2, forms a metallic state that enables proton transport at temperatures below 600°C (see the Perspective by Ni and Shao). The authors constructed a hydrogen fuel cell with this material that delivered 1 watt per centimeter. Science , this issue p. [184][1]; see also p. [138][2] Tuning a semiconductor to function as a fast proton conductor is an emerging strategy in the rapidly developing field of proton ceramic fuel cells (PCFCs). The key challenge for PCFC researchers is to formulate the proton-conducting electrolyte with conductivity above 0.1 siemens per centimeter at low temperatures (300 to 600°C). Here we present a methodology to design an enhanced proton conductor by means of a Na x CoO2/CeO2 semiconductor heterostructure, in which a field-induced metallic state at the interface accelerates proton transport. We developed a PCFC with an ionic conductivity of 0.30 siemens per centimeter and a power output of 1 watt per square centimeter at 520°C. Through our semiconductor heterostructure approach, our results provide insight into the proton transport mechanism, which may also improve ionic transport in other energy applications. [1]: /lookup/doi/10.1126/science.aaz9139 [2]: /lookup/doi/10.1126/science.abc9136 |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/283400 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Y. Wu,B. Zhu,M. Huang,et al. Proton transport enabled by a field-induced metallic state in a semiconductor heterostructure[J]. Science,2020. |
APA | Y. Wu.,B. Zhu.,M. Huang.,L. Liu.,Q. Shi.,...&H. B. Song.(2020).Proton transport enabled by a field-induced metallic state in a semiconductor heterostructure.Science. |
MLA | Y. Wu,et al."Proton transport enabled by a field-induced metallic state in a semiconductor heterostructure".Science (2020). |
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