Porphyrin-Based Symmetric Redox-Flow Batteries towards Cold-Climate Energy Storage
Porphyrin-Based Symmetric Redox-Flow Batteries towards Cold-Climate Energy Storage
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DOI：
10.1002/anie.201713423
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发表时间：
2018-03-12
影响因子：
16.6
通讯作者：
Chen, Jun
中科院分区：
文献类型：
--
作者：
Ma, Ting;Pan, Zeng;Chen, Jun
低温下氧化还原液流电池的电化学储能对于寒冷地区可再生能源的利用具有重要意义。然而，RFB通常在10摄氏度以上使用。本文提出了基于5，10，15，20-四苯基卟啉（H2 TPP）作为双极氧化还原活性材料（阳极：[H2 TPP]（2-）/H2 TPP，阴极：H2 TPP/[H2 TPP]（2+））和具有高离子电导率的Y-沸石-聚（偏二氟乙烯）（Y-PVDF）离子选择性膜作为隔膜的非水有机RFB。所构建的RFB在20至-40 ℃的温度范围内表现出8.72AhL（-1）的高体积容量和2.83V的高电压以及优异的循环稳定性（每次循环的容量保持率超过99.98%）。我们的研究强调了在低温下工作的RFBs的设计原则，从而为寒冷气候条件下的电化学储能提供了一种有前途的方法。
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 degrees 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 8.72AhL(-1) with a high voltage of 2.83V and excellent cycling stability (capacity retention exceeding 99.98% per cycle) in the temperature range between 20 and -40 degrees 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.