Guiding Uniform Li Plating/Stripping through Lithium-Aluminum Alloying Medium for Long-Life Li Metal Batteries

Huan Ye; Zi-Jian Zheng; Hu-Rong Yao; Shun-Chang Liu; Tong-Tong Zuo; Xiong-Wei Wu; Ya-Xia Yin; Nian-Wu Li; Jiang-Jiang Gu; Fei-Fei Cao; Yu-Guo Guo

doi:10.1002/anie.201811955

Guiding Uniform Li Plating/Stripping through Lithium-Aluminum Alloying Medium for Long-Life Li Metal Batteries

Angew Chem Int Ed Engl. 2019 Jan 21;58(4):1094-1099. doi: 10.1002/anie.201811955. Epub 2018 Dec 20.

Authors

Huan Ye^{1

2}, Zi-Jian Zheng³, Hu-Rong Yao^{1

4}, Shun-Chang Liu^{1

4}, Tong-Tong Zuo^{1

4}, Xiong-Wei Wu^{1

4}, Ya-Xia Yin^{1

4}, Nian-Wu Li^{1

4}, Jiang-Jiang Gu², Fei-Fei Cao², Yu-Guo Guo^{1

4}

Affiliations

¹ CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China.
² Huazhong Agricultural University, Wuhan, 430070, P. R. China.
³ Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, P. R. China.
⁴ University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.

PMID: 30447094
DOI: 10.1002/anie.201811955

Abstract

The uncontrolled growth of Li dendrites upon cycling might result in low coulombic efficiency and severe safety hazards. Herein, a lithiophilic binary lithium-aluminum alloy layer, which was generated through an in situ electrochemical process, was utilized to guide the uniform metallic Li nucleation and growth, free from the formation of dendrites. Moreover, the formed LiAl alloy layer can function as a Li reservoir to compensate the irreversible Li loss, enabling long-term stability. The protected Li electrode shows superior cycling over 1700 h in a Li|Li symmetric cell.

Keywords: Li anodes; alloys; dendrites; lithium metal batteries.

Abstract

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