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https://hdl.handle.net/2440/139302
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Type: | Journal article |
Title: | Low-cost and Non-flammable Eutectic Electrolytes for Advanced Zn-I2 Batteries |
Author: | Hao, J. Yuan, L. Zhu, Y. Bai, X. Ye, C. Jiao, Y. Qiao, S. |
Citation: | Angewandte Chemie International Edition, 2023; 62(39):1-8 |
Publisher: | Wiley |
Issue Date: | 2023 |
ISSN: | 1433-7851 1521-3773 |
Statement of Responsibility: | Junnan Hao, Libei Yuan, Yilong Zhu, Xiaowan Bai, Chao Ye, Yan Jiao, Shi-Zhang Qiao |
Abstract: | As a burgeoning electrolyte system, eutectic electrolytes based on ZnCl2/Zn(CF3SO3)2/Zn(TFSI)2 have been widely proposed in advanced Zn-I2 batteries; however, safety and cost concerns significantly limit their applications. Here, we report new-type ZnSO4-based eutectic electrolytes that are both safe and cost-effective. Their universality is evident in various solvents of polyhydric alcohols, in which multiple -OH groups not only involve in Zn2+ solvation but also interact with water, resulting in the high stability of electrolytes. Taking propylene glycol-based hydrate eutectic electrolyte (HEE) as an example, it features significant advantages in non-flammability and low price that is < 1/200 cost of Zn(CF3SO3)2/Zn(TFSI)2-based eutectic electrolytes. Moreover, its effectiveness in confining the shuttle effects of I2 cathode and side reactions of Zn anodes is evidenced, resulting in Zn-I2 coin cells with high reversibility at 1 C and 91.4% capacity remaining under 20 C. After scaling up to the pouch cell with a record mass loading of 33.3 mg cm-2, super-high-capacity retention of 96.7% is achieved after 500 cycles, which exceeds other aqueous counterparts. This work significantly broadens the eutectic electrolyte family for advanced Zn battery design. |
Keywords: | Eutectic electrolyte low temperature non-flammable shuttle free Zn-I2 battery |
Description: | Version of record online: August 18, 2023 |
Rights: | © 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCHGmbH |
DOI: | 10.1002/anie.202310284 |
Grant ID: | http://purl.org/au-research/grants/arc/DP220102596 http://purl.org/au-research/grants/arc/DP200100365 http://purl.org/au-research/grants/arc/DE230100032 http://purl.org/au-research/grants/arc/DE230100471 http://purl.org/au-research/grants/arc/FL170100154 |
Published version: | http://dx.doi.org/10.1002/anie.202310284 |
Appears in Collections: | Chemical Engineering publications |
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