DataVXACS Energy LettersPaper
journal article·2019-11-08

Proton Shuttles in CeO2/CeO2−δ Core–Shell Structure

Yueming Xing, Yan Wu, Lingyao Li, Quan Shi, Jing Shi, Sining Yun, Muhammad Akbar, Baoyuan Wang, Jung-Sik Kim, Bin Zhu

ACS Energy Letters· Volume 4· Issue 11
Publisher page
Source abstract

Abstract

We report a confined proton transportation in the CeO2/CeO2−δ core–shell structure to build up proton shuttles, leading to a super proton conductivity of 0.16 S cm–1 for the electrolyte and advanced fuel cell performance, 697 mW cm–2 at 520 °C. The semiconductor nature of the CeO2 (i-type) core and the CeO2−δ (n-type) shell reveals a unique proton transport mechanism based on the charged layers formed at the interface of the CeO2−δ/CeO2 heterostructure. Two key factors of this structure confine proton transport to the particle surface. The first is the high concentration of oxygen vacancies in the surface layer, which benefits proton conduction. The second is a depletion region created by the core–shell interface that allows proton migration only on the surface layer rather than into the bulk CeO2. The constrained surface region of the CeO2−δ builds up continuous proton shuttles. This work presents a new methodology and understanding for proton transport in general oxides and a new generation proton ceramic fuel cells.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageCeramics & glassesElectronic materials

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Engineering Research Center of Nano-Geo Materials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, China

MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, School of Science, Xi’an Jiaotong University, Xi’an 710049, China

Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China

Hubei Collaborative Innovation Center for Advanced Organic Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, China

Department of Aero & Auto Engineering, Loughborough University, Ashby Road, Loughborough LE11 3TU, United Kingdom

Funding

National Natural Science Foundation of China

References (20)

Show source-provided references
1. 10.1038/3500917710.1038/35009177 ↗
2. 10.1038/3510462010.1038/35104620 ↗
3. 10.1016/j.jpowsour.2014.01.04110.1016/j.jpowsour.2014.01.041 ↗
4. 10.1016/j.nanoen.2018.08.07010.1016/j.nanoen.2018.08.070 ↗
5. 10.1039/C0CP01702G10.1039/C0CP01702G ↗
6. 10.1021/nn505345c10.1021/nn505345c ↗
7. 10.1039/C9TA00499H10.1039/C9TA00499H ↗
8. 10.1038/ncomms1536010.1038/ncomms15360 ↗
9. 10.1021/jp406653210.1021/jp4066532 ↗
10. 10.1063/1.488554610.1063/1.4885546 ↗
11. 10.1021/acs.chemmater.6b0154810.1021/acs.chemmater.6b01548 ↗
12. 10.1016/S0955-2219(01)00152-210.1016/S0955-2219(01)00152-2 ↗
13. Yu P. Y. · 2010
14. 10.1016/j.solmat.2015.06.02710.1016/j.solmat.2015.06.027 ↗
15. 10.1021/nl402810d10.1021/nl402810d ↗
16. 10.1002/adma.20100229010.1002/adma.201002290 ↗
17. 10.1149/1.362561110.1149/1.3625611 ↗
18. 10.1039/C4CP04766D10.1039/C4CP04766D ↗
19. 10.1021/acsenergylett.7b0099710.1021/acsenergylett.7b00997 ↗
20. 10.1002/er.410510.1002/er.4105 ↗