Mixed electronic and oxide ionic conduction and migration mechanisms in digermanate La2−xCaxGe2O7−x/2

Author:

Liang Lu1,Li Xiaohui12ORCID,Wang Xiaoge3,Luo Zhaoji4,Lin Kun1,Li Qiang1ORCID,Deng Sihao5,He Lunhua5,Kuang Xiaojun24ORCID,Xing Xianran1ORCID

Affiliation:

1. Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, University of Science and Technology Beijing, Beijing 100083, People's Republic of China

2. Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, People's Republic of China

3. College of Chemistry and Molecular Engineering, Peking University, Beijing National Laboratory for Molecular Science (BNLMS), Beijing 100871, People's Republic of China

4. MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guangxi Universities Key Laboratory of Nonferrous Metal Oxide Electronic Functional Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, People's Republic of China

5. Songshan Lake Materials Laboratory, Dongguan 523808, China; Spallation Neutron Source Science Center, Dongguan 523803, People's Republic of China

Abstract

Mixed electronic and oxide ion conduction was enabled in digermanate La2−xCaxGe2O7−x/2. Oxygen vacancy was stabilized and transported by sharing oxygen and oxygen exchange between Ge3O10 and GeO4 units, showing three-dimensional oxide ion transport.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Natural Science Foundation of Guangxi Province

Publisher

Royal Society of Chemistry (RSC)

Subject

Inorganic Chemistry

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