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- Title
Using an AlCl<sub>3</sub>/Urea Ionic Liquid Analog Electrolyte for Improving the Lifetime of Aluminum‐Sulfur Batteries.
- Authors
Bian, Yinghui; Li, Yu; Yu, Zhichao; Chen, Hui; Du, Kewen; Qiu, Chaochao; Zhang, Guoxin; Lv, Zichuan; Lin, Meng‐Chang
- Abstract
Aluminum‐sulfur (Al−S) chemistry is attractive for the development of next‐generation rechargeable battery systems. However, only a few reversible Al−S cells have been reported until now. This paper demonstrates that the use of an AlCl3/urea electrolyte in Al−S cells is a promising approach to improve the cycle life and reach a high discharge voltage plateau of ∼1.6–2.0 V. In contrast to the instability of sulfur in the conventional AlCl3/EMIC electrolyte, sulfur is chemically stable in the AlCl3/urea electrolyte, which allows better cell cycling stability. The Al−S cell delivers an initial capacity of ∼700 mAh gs−1 and maintains a capacity of up to ∼500 mAh gs−1 after 100 cycles. Performance of a lifetime: the cycle life of an Al−S battery was significantly enhanced by replacing EMIC with urea.The Al−S cell with the AlCl3/urea electrolyte is stable for >100 charge/discharge cycles, the longest cycle life reported in the literature so far. By charging to a cut‐off of 2.4 V, the Al−S cell reaches a discharge voltage plateau of ∼1.6–2.0 V, superior to those of Al−S cells with EMIC‐ or NBMPBr‐based electrolyte (∼0.2–1.3 V).
- Subjects
ALUMINUM; SULFUR; STORAGE batteries; LITHIUM-ion batteries; ELECTROCHEMICAL analysis
- Publication
ChemElectroChem, 2018, Vol 5, Issue 23, p3607
- ISSN
2196-0216
- Publication type
Article
- DOI
10.1002/celc.201801198