Are sodiation/de-sodiation reactions reversible in two-dimensional metallic NbSe2?

Author:

Liu Zaichun1,Wang Rui2,Zhang Panpan3ORCID,Dun Chaochao4ORCID,Urban Jeffrey J.4ORCID,Yang Sheng5ORCID,Wang Tao1ORCID,Ma Yuan1,Zhong Yiren1,He Jiarui1,Zhu Zhi1,Xiong Xiaosong1,Fan Weijia1,Zhou Qi1,Yang Haoyuan1,Cheng Xin-Bing1ORCID,Wang Faxing1ORCID,Huang Ying36ORCID,Wu Yuping1ORCID

Affiliation:

1. Confucius Energy Storage Lab, School of Energy and Environment, Southeast University, Nanjing, 211189, China

2. Department of Engineering, University of Cambridge, 17 Charles Babbage Road, Cambridge, CB3 0FS, UK

3. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Luoyu Road 1037, 430074 Wuhan, China

4. The Molecular Foundry, Lawrence Berkeley National Laboratory Berkeley, Berkeley, CA, 94720, USA

5. Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China

6. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, 518060 Shenzhen, China

Abstract

The sodiation/de-sodiation mechanism of metallic NbSe2 anodes is corrected to involve an initial irreversible conversion from NbSe2 to Na2Se/Nb composites and the subsequent reversible selenide conversion reaction.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Innovative Research Group Project of the National Natural Science Foundation of China

Publisher

Royal Society of Chemistry (RSC)

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