Influence of ethylene sulfite in lithium bis(trifluoromethane)sulfonimide-based electrolyte for dual carbon battery

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-09-02 DOI:10.1007/s11581-024-05800-1

Z. Yan, Z. Osman, M. Z. Kufian

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Abstract

Dual carbon batteries (DCB) are gaining traction in energy storage research due to their cost-effectiveness, better safety, eco-friendliness, and rapid charging capability. Despite these merits, carbon-based electrode systems face many challenges, particularly in their relatively lower energy density. Researchers are addressing this by exploring innovative strategies, with a focus on electrolyte additives. One noteworthy additive is ethylene sulfite (ES), recognized for its protective effect on electrodes. This study compares two LiTFSI-based electrolytes, one of which is enhanced with ES, to determine their potential in improving DCB capabilities. The LiTFSI-ES electrolyte demonstrates a higher conductivity (7.29 × 10⁻³ S cm⁻¹) and a broader potential window (5.554 V) compared to LiTFSI alone. Cyclic voltammetry (CV) and dQ/dV analysis confirm the intercalation of TFSI⁻ anions in the graphite electrode, indicating DCB behavior. This research contributes valuable insights into enhancing DCB performance through the incorporation of ES and sheds light on the electrochemical behavior of the LiTFSI-ES electrolyte.

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双碳电池双（三氟甲烷）磺酰亚胺基锂电解质中亚硫酸乙烯的影响

双碳电池（DCB）因其成本效益高、安全性好、环保和快速充电能力强等优点，在储能研究领域正日益受到重视。尽管具有这些优点，但碳基电极系统仍面临许多挑战，尤其是能量密度相对较低。研究人员正在通过探索创新战略来解决这一问题，重点是电解质添加剂。其中一种值得注意的添加剂是亚硫酸乙烯（ES），它对电极具有公认的保护作用。本研究比较了两种基于 LiTFSI 的电解质（其中一种添加了 ES），以确定它们在提高 DCB 能力方面的潜力。与单独使用 LiTFSI 相比，LiTFSI-ES 电解质具有更高的电导率（7.29 × 10-3 S cm-1）和更宽的电位窗口（5.554 V）。循环伏安法（CV）和 dQ/dV 分析证实了 TFSI 阴离子在石墨电极中的插层，表明了 DCB 行为。这项研究为通过加入 ES 提高 DCB 性能提供了宝贵的见解，并揭示了 LiTFSI-ES 电解质的电化学行为。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.