A Universal Additive Design Strategy to Modulate Solvation Structure and Hydrogen Bond Network toward Highly Reversible Fe Anode for Low-Temperature All-Iron Flow Batteries
文献类型：期刊论文
| 作者 | Yang, Jing1,2; Yan, Hui1,2; Zhang, Qi-an2; Song, Yuanfang1,2; Li, Ying2; Tang, Ao2 |
| 刊名 | SMALL
 |
| 出版日期 | 2023-10-11 |
| 页码 | 12 |
| 关键词 | additive design Fe anodes hydrogen-bond interaction low temperatures solvation structures |
| ISSN号 | 1613-6810 |
| DOI | 10.1002/smll.202307354 |
| 通讯作者 | Li, Ying(liying@imr.ac.cn) ; Tang, Ao(a.tang@imr.ac.cn) |
| 英文摘要 | Aqueous all-iron redox flow batteries (RFBs) are promising competitors for next-generation grid-scale energy storage applications. However, the high-performance operation of all-iron RFBs in a wider temperature range is greatly hindered by inferior iron plating/stripping reaction and low solid-liquid transition temperature at Fe anode. Herein, a universal electrolyte additive design strategy for all-iron RFBs is reported, which realizes a highly reversible and dendrite-free Fe anode at low temperatures. Quantum chemistry calculations first screen several organic molecules with oxygen-containing functional groups and identify N,N-Dimethylacetmide (DMAc) as a potential candidate with low cost, high solubility, and strong interactions with Fe2+ and H2O. Combined experimental characterizations and theoretical calculations subsequently demonstrate that adding DMAc into the FeCl2 solution effectively reshapes the primary solvation shell of Fe2+ via the Fe2+-O (DMAc) bond and breaks hydrogen-bonding network of water through intensified H-bond interaction between DMAc and H2O, thereby affording the Fe anode with enhanced Fe/Fe2+ reversibility and lower freezing point. Consequently, the assembled all-iron RFB achieves an excellent combination of high power density (25 mW cm-2), long charge-discharge cycling stability (95.59% capacity retention in 103 h), and preeminent battery efficiency at -20 degrees C (95% coulombic efficiency), which promise a future for wider temperature range operation of all-iron RFBs. A universal additive design strategy is proposed for all-iron flow batteries at low-temperature operation. By reshaping the solvation structure and breaking hydrogen-bonding network of water, N,N-Dimethylacetmide (DMAc) proves to realize both enhanced Fe/Fe2+ reversibility and lower freezing point, which enables the all-iron flow cell an excellent combination of high power density, long cycling stability and preeminent battery efficiency at -20 degrees C.image |
| 资助项目 | This work was supported by the Natural Science Foundation of Liaoning Province (Grant No. 2023-MS-021).[2023-MS-021] ; Natural Science Foundation of Liaoning Province |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001079002200001 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 资助机构 | This work was supported by the Natural Science Foundation of Liaoning Province (Grant No. 2023-MS-021). ; Natural Science Foundation of Liaoning Province |
| 源URL | [http://ir.imr.ac.cn/handle/321006/179418]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Li, Ying; Tang, Ao |
| 作者单位 | 1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110000, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Jing,Yan, Hui,Zhang, Qi-an,et al. A Universal Additive Design Strategy to Modulate Solvation Structure and Hydrogen Bond Network toward Highly Reversible Fe Anode for Low-Temperature All-Iron Flow Batteries[J]. SMALL,2023:12. |
| APA | Yang, Jing,Yan, Hui,Zhang, Qi-an,Song, Yuanfang,Li, Ying,&Tang, Ao.(2023).A Universal Additive Design Strategy to Modulate Solvation Structure and Hydrogen Bond Network toward Highly Reversible Fe Anode for Low-Temperature All-Iron Flow Batteries.SMALL,12. |
| MLA | Yang, Jing,et al."A Universal Additive Design Strategy to Modulate Solvation Structure and Hydrogen Bond Network toward Highly Reversible Fe Anode for Low-Temperature All-Iron Flow Batteries".SMALL (2023):12. |
入库方式： OAI收割
来源：金属研究所
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