High performance sodium-sulfur batteries at low temperature enabled by superior molten Na wettability

Minyuan M. Li; Xiaochuan Lu; Xiaowen Zhan; Mark H. Engelhard; Jeffrey F. Bonnett; Evgueni Polikarpov; Keeyoung Jung; David M. Reed; Vincent L. Sprenkle; Guosheng Li

doi:10.1039/D0CC06987F

High performance sodium-sulfur batteries at low temperature enabled by superior molten Na wettability†

Minyuan M. Li,

^a Xiaochuan Lu,*^b Xiaowen Zhan,

^c Mark H. Engelhard,

^a Jeffrey F. Bonnett,^a Evgueni Polikarpov,

^a Keeyoung Jung,

^d David M. Reed,^a Vincent L. Sprenkle^a and Guosheng Li

*^a

Author affiliations

* Corresponding authors

^a Electrochemical Materials and Systems Group, Pacific Northwest National Laboratory, Richland, WA 99352, USA
E-mail: guosheng.Li@pnnl.gov

^b Department of Applied Engineering Technology, North Carolina A&T State University, Greensboro, North Carolina 27411, USA
E-mail: xlu@ncat.edu

^c College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, P. R. China

^d Materials Research Division, Research Institute of Industrial Science & Technology, Pohang, South Korea

Abstract

Reducing the operating temperature of conventional molten sodium–sulfur batteries (∼350 °C) is critical to create safe and cost-effective large-scale storage devices. By raising the surface treatment temperature of lead acetate trihydrate, the sodium wettability on β′′-Al₂O₃ improved significantly at 120 °C. The low temperature Na–S cell can reach a capacity as high as 520.2 mA h g⁻¹ and stable cycling over 1000 cycles.

Chemical Communications

High performance sodium-sulfur batteries at low temperature enabled by superior molten Na wettability†

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High performance sodium-sulfur batteries at low temperature enabled by superior molten Na wettability

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