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- Title
Porphyrin‐Based Symmetric Redox‐Flow Batteries towards Cold‐Climate Energy Storage.
- Authors
Ma, Ting; Pan, Zeng; Miao, Licheng; Chen, Chengcheng; Han, Mo; Shang, Zhenfeng; Chen, Jun
- Abstract
Abstract: Electrochemical energy storage with redox‐flow batteries (RFBs) under subzero temperature is of great significance for the use of renewable energy in cold regions. However, RFBs are generally used above 10 °C. Herein we present non‐aqueous organic RFBs based on 5,10,15,20‐tetraphenylporphyrin (H2TPP) as a bipolar redox‐active material (anode: [H2TPP]2−/H2TPP, cathode: H2TPP/[H2TPP]2+) and a Y‐zeolite–poly(vinylidene fluoride) (Y‐PVDF) ion‐selective membrane with high ionic conductivity as a separator. The constructed RFBs exhibit a high volumetric capacity of 8.72 Ah L−1 with a high voltage of 2.83 V and excellent cycling stability (capacity retention exceeding 99.98 % per cycle) in the temperature range between 20 and −40 °C. Our study highlights principles for the design of RFBs that operate at low temperatures, thus offering a promising approach to electrochemical energy storage under cold‐climate conditions.
- Subjects
ENERGY storage; DIFLUOROETHYLENE; IONIC conductivity; ELECTRIC batteries; COLD regions; BARIUM zirconate
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 12, p3212
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201713423