High-Voltage Symmetric Nonaqueous Redox Flow Battery Based on Modularly Tunable [Ru2M(μ3-O)(CH3CO2)6(py)3] (M = Ru, Mn, Co, Ni, Zn) Cluster Compounds with Multielectron Storage Capability
- Authors
- Choi, Suhyuk; Jeon, Hyeri; Kim, Youngsam; Kang, Philjae; Sim, Eunji; Hong, Seungwoo; Ahn, Hyun S.
- Issue Date
- Nov-2022
- Publisher
- American Chemical Society
- Citation
- ACS Materials Letters, v.4, no.11, pp 2159 - 2165
- Pages
- 7
- Journal Title
- ACS Materials Letters
- Volume
- 4
- Number
- 11
- Start Page
- 2159
- End Page
- 2165
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152340
- DOI
- 10.1021/acsmaterialslett.2c00718
- ISSN
- 2639-4979
2639-4979
- Abstract
- Redox flow batteries (RFBs) provide an attractive solution for large-scale energy buffering and storage. This report describes the development of nonaqueous RFBs based on trimetallic coordination cluster compounds: [Ru2M(μ3-O)(CH3CO2)6(py)3] (M = Ru, Mn, Co, Ni, Zn). The all-ruthenium complex exhibited stable battery cycles in anolyte-catholyte symmetric operation, with rarely observed multielectron storage in a single molecule. Moreover, the complex holds modularly tunable synthetic handles for systematic improvements in solubility and redox potentials. An optimized battery stack containing [Ru3(μ3-O)(CH3CO2)6(py)3]+ anolyte and [Ru2Co(μ3-O)(CH3CO2)6(py)3] catholyte yielded stable cycles with a discharge voltage of 2.4 V, comparable to the state-of-the-art nonaqueous RFBs. Explanation for the exceptional stability of the charged states and prediction of systematic tunability of the redox potentials of the cluster compounds were assisted by DFT calculations. © 2022 American Chemical Society.
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