{"title":"为高容量锌-溴液流电池管理溴的均相络合策略","authors":"Qinghua Xiong, Mingbao Huang, Tianlu Ren, Shixi Wu, Wenfeng Wang, Zhipeng Xiang, Kai Wan, Zhiyong Fu, Zhenxing Liang","doi":"10.1002/aenm.202403347","DOIUrl":null,"url":null,"abstract":"Zinc–bromine flow batteries (ZBFBs) have received widespread attention as a transformative energy storage technology with a high theoretical energy density (430 Wh kg<sup>−1</sup>). However, its efficiency and stability have been long threatened as the positive active species of polybromide anions (Br<sub>2</sub><i><sub>n</sub></i><sub>+1</sub><sup>−</sup>) are subject to severe crossover across the membrane at a high concentration. Herein, a novel highly hydrophilic complexing agent, N-methyl-N, N-bis(2-hydroxyethyl)-1-propanaminium bromide (PMDA), is developed to effectively manage bromine in a homogeneous posolyte, which realizes a low bromine crossover at a high operating concentration in ZBFBs. Both theoretical and experimental results suggest that the PMDA interacts with Br<sub>2</sub><i><sub>n</sub></i><sub>+1</sub><sup>−</sup> and forms a larger-size complex PMDABr<sub>2</sub><i><sub>n</sub></i><sub>+1</sub>. When adding 0.40 <span>m</span> PMDA, the bromine stays homogeneous at a high concentration up to 1.20 <span>m</span>, and its permeability is remarkably decreased by 74%. For demonstration, the ZBFB achieves a operating capacity record of 57.2 Ah L<sup>−1</sup> in a homogeneous bromine posolyte with a high Coulombic efficiency of ≈90.0% and superior cycling stability (capacity retention rate of 100.0% per cycle). This work provides one innovative bromine management strategy to realize a high capacity and superior stability in ZBFBs.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Homogeneous Complexation Strategy to Manage Bromine for High-Capacity Zinc–Bromine Flow Battery\",\"authors\":\"Qinghua Xiong, Mingbao Huang, Tianlu Ren, Shixi Wu, Wenfeng Wang, Zhipeng Xiang, Kai Wan, Zhiyong Fu, Zhenxing Liang\",\"doi\":\"10.1002/aenm.202403347\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Zinc–bromine flow batteries (ZBFBs) have received widespread attention as a transformative energy storage technology with a high theoretical energy density (430 Wh kg<sup>−1</sup>). However, its efficiency and stability have been long threatened as the positive active species of polybromide anions (Br<sub>2</sub><i><sub>n</sub></i><sub>+1</sub><sup>−</sup>) are subject to severe crossover across the membrane at a high concentration. Herein, a novel highly hydrophilic complexing agent, N-methyl-N, N-bis(2-hydroxyethyl)-1-propanaminium bromide (PMDA), is developed to effectively manage bromine in a homogeneous posolyte, which realizes a low bromine crossover at a high operating concentration in ZBFBs. Both theoretical and experimental results suggest that the PMDA interacts with Br<sub>2</sub><i><sub>n</sub></i><sub>+1</sub><sup>−</sup> and forms a larger-size complex PMDABr<sub>2</sub><i><sub>n</sub></i><sub>+1</sub>. When adding 0.40 <span>m</span> PMDA, the bromine stays homogeneous at a high concentration up to 1.20 <span>m</span>, and its permeability is remarkably decreased by 74%. For demonstration, the ZBFB achieves a operating capacity record of 57.2 Ah L<sup>−1</sup> in a homogeneous bromine posolyte with a high Coulombic efficiency of ≈90.0% and superior cycling stability (capacity retention rate of 100.0% per cycle). This work provides one innovative bromine management strategy to realize a high capacity and superior stability in ZBFBs.\",\"PeriodicalId\":111,\"journal\":{\"name\":\"Advanced Energy Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":24.4000,\"publicationDate\":\"2024-10-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Energy Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/aenm.202403347\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202403347","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Homogeneous Complexation Strategy to Manage Bromine for High-Capacity Zinc–Bromine Flow Battery
Zinc–bromine flow batteries (ZBFBs) have received widespread attention as a transformative energy storage technology with a high theoretical energy density (430 Wh kg−1). However, its efficiency and stability have been long threatened as the positive active species of polybromide anions (Br2n+1−) are subject to severe crossover across the membrane at a high concentration. Herein, a novel highly hydrophilic complexing agent, N-methyl-N, N-bis(2-hydroxyethyl)-1-propanaminium bromide (PMDA), is developed to effectively manage bromine in a homogeneous posolyte, which realizes a low bromine crossover at a high operating concentration in ZBFBs. Both theoretical and experimental results suggest that the PMDA interacts with Br2n+1− and forms a larger-size complex PMDABr2n+1. When adding 0.40 m PMDA, the bromine stays homogeneous at a high concentration up to 1.20 m, and its permeability is remarkably decreased by 74%. For demonstration, the ZBFB achieves a operating capacity record of 57.2 Ah L−1 in a homogeneous bromine posolyte with a high Coulombic efficiency of ≈90.0% and superior cycling stability (capacity retention rate of 100.0% per cycle). This work provides one innovative bromine management strategy to realize a high capacity and superior stability in ZBFBs.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.