Proton transport enabled by a field-induced metallic state in a semiconductor heterostructure

doi:10.1126/science.aaz9139

GSTDTAP > 气候变化

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
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
引用统计
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).