DataVXACS Materials LettersPaper
journal article·2024-06-03

Acid- and Alkali-Resistant Microporous Na4Cu8Ge3S12·xH2O Exhibiting Fast Mixed Sodium Ion and Electron Conduction

Guo-Qin Zhang, Hao-Yu Li, Jing-Bo Song, Shuo Zuo, Hong-Bin Luo, Gongping Liu, Yang Zou, Zheng-Fang Tian, Xiao-Ming Ren

ACS Materials Letters· Volume 6· Issue 6
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Source abstract

Abstract

Mixed ion-electron conductors (MIECs) capable of simultaneously transporting ions and electrons possess critical applications in a large variety of electrochemical devices. However, the development of MIECs with desirable conduction and stability remains a great challenge. Herein, we present the first example of an open-framework metal chalcogenide for use as a MIEC with mixed sodium ion and electron conduction. The open-framework metal chalcogenide, Na 4 Cu 8 Ge 3 S 12 · x H 2 O ( NCGS ), comprised of a {[Cu 8 Ge 3 S 12 ] 4– } ∞ anion framework, Na + counter cations, and lattice water molecules, displays good thermal stability and remarkable resistance to acid and alkali. Importantly, NCGS exhibits fast mixed sodium ion and electron conduction under high humidity conditions, with a sodium ionic conductivity of 4.05 × 10 –2 S cm –1 and electronic conductivity of 4.03 × 10 –3 S cm –1 at room temperature and achieves the maximum value of 1.16 × 10 –1 S cm –1 and 8.12 × 10 –2 S cm –1 at 328 K, respectively. This study provides new opportunities for the development of high-performing MIECs toward practical application in electrochemical devices.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Photocatalysis Techniques

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Affiliations

State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China

State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, P. R. China

Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, P. R. China

College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, P. R. China

State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China

Funding

Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Postgraduate Research & Practice Innovation Program of Jiangsu Province of China

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