Reviewing electrochemical stability of ionic liquids-/deep eutectic solvents-based electrolytes in lithium-ion, lithium-metal and post-lithium-ion batteries for green and safe energy

Yu Chen; Shuzi Liu; Zixin Bi; Zheng Li; Fengyi Zhou; Ruifen Shi; Tiancheng Mu

Green Energy & Environment (Jun 2024)

Reviewing electrochemical stability of ionic liquids-/deep eutectic solvents-based electrolytes in lithium-ion, lithium-metal and post-lithium-ion batteries for green and safe energy

Yu Chen,
Shuzi Liu,
Zixin Bi,
Zheng Li,
Fengyi Zhou,
Ruifen Shi,
Tiancheng Mu

Affiliations

Yu Chen: Department of Chemistry and Material Science, Langfang Normal University, NO. 100 Aimin West Road, Langfang, Hebei, 065000, China; Corresponding authors.
Shuzi Liu: Department of Chemistry, Renmin University of China, NO. 59 Zhongguancun Street, Haidian District, Beijing, 100872, China
Zixin Bi: Department of Chemistry and Material Science, Langfang Normal University, NO. 100 Aimin West Road, Langfang, Hebei, 065000, China
Zheng Li: Department of Chemistry and Material Science, Langfang Normal University, NO. 100 Aimin West Road, Langfang, Hebei, 065000, China
Fengyi Zhou: Department of Chemistry, Renmin University of China, NO. 59 Zhongguancun Street, Haidian District, Beijing, 100872, China
Ruifen Shi: Department of Chemistry, Renmin University of China, NO. 59 Zhongguancun Street, Haidian District, Beijing, 100872, China
Tiancheng Mu: Department of Chemistry, Renmin University of China, NO. 59 Zhongguancun Street, Haidian District, Beijing, 100872, China; Corresponding authors.

Journal volume & issue: Vol. 9, no. 6
pp. 966 – 991

Abstract

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Sustainable energy is the key issue for the environment protection, human activity and economic development. Ionic liquids (ILs) and deep eutectic solvents (DESs) are dogmatically regarded as green and sustainable electrolytes in lithium-ion, lithium-metal (e.g., lithium-sulphur, lithium-oxygen) and post-lithium-ion (e.g., sodium-ion, magnesium-ion, and aluminum-ion) batteries. High electrochemical stability of ILs/DESs is one of the prerequisites for green, sustainable and safe energy; while easy electrochemical decomposition of ILs/DESs would be contradictory to the concept of green chemistry by adding the cost, releasing volatile/hazardous by-products and hindering the recyclability. However, (1) are ILs/DESs-based electrolytes really electrochemically stable when they are not used in batteries? (2) are ILs/DESs-based electrolytes really electrochemically stable in real batteries? (3) how to design ILs/DESs-based electrolytes with high electrochemical stability for batteries to achieve sustainability and green development? Up to now, there is no summary on this topic, to the best of our knowledge. Here, we review the effect of chemical structure and non-structural factors on the electrochemical stability of ILs/DESs in simulated conditions. More importantly, electrochemical stability of ILs/DESs in real lithium-ion, lithium-metal and post-lithium-ion batteries is concluded and compared. Finally, the strategies to improve the electrochemical stability of ILs/DESs in lithium-ion, lithium-metal and post-lithium-ion batteries are proposed. This review would provide a guide to design ILs/DESs with high electrochemical stability for lithium-ion, lithium-metal and post-lithium-ion batteries to achieve sustainable and green energy.

Published in Green Energy & Environment

ISSN: 2468-0257 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mechanical engineering and machinery: Renewable energy sources; Science: Biology (General): Ecology
Website: https://www.keaipublishing.com/en/journals/green-energy-and-environment/

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