Hydrogen/manganese hybrid redox flow battery
Hydrogen/manganese hybrid redox flow battery
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DOI：
10.1088/2515-7655/aaee17
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发表时间：
2019-01-01
影响因子：
6.9
通讯作者：
Gomez-Gonzalez, Miguel
中科院分区：
文献类型：
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作者：
Rubio-Garcia, Javier;Kucernak, Anthony;Gomez-Gonzalez, Miguel
电化学储能是进一步整合可再生能源的关键技术。氧化还原液流电池（RFB）由于其耐用性、效率和快速响应而成为此类应用的有希望的候选者。然而，现有RFB的部署受到（通常基于钒的）电解质的相对高的成本的阻碍。锰是一种地球上丰富而廉价的元素，广泛用于一次性碱性电池。然而，由于Mn（III）的不稳定性导致MnO（2）通过反硝化反应沉淀，迄今为止对RFB的探索很少。在这里，我们表明，通过将容易的氢负电极反应与抑制Mn（III）还原的电解质相结合，可以构建具有高往返能量效率（82%）和高功率和能量密度（1410 mW cm（-2），33 Wh l（-1））的氢/锰混合RFB，与钒氧化还原液流电池相比，估计成本降低70%。
Electrochemical energy storage is a key enabling technology for further integration of renewables sources. Redox flow batteries (RFBs) are promising candidates for such applications as a result of their durability, efficiency and fast response. However, deployment of existing RFBs is hindered by the relatively high cost of the (typically vanadium-based) electrolyte. Manganese is an earth-abundant and inexpensive element that is widely used in disposable alkaline batteries. However it has hitherto been little explored for RFBs due to the instability of Mn(III) leading to precipitation of MnO(2)via a disproportionation reaction. Here we show that by combining the facile hydrogen negative electrode reaction with electrolytes that suppress Mn(III) disproportionation, it is possible to construct a hydrogen/manganese hybrid RFB with high round trip energy efficiency (82%), and high power and energy density (1410 mW cm(-2), 33 Wh l(-1)), at an estimated 70% cost reduction compared to vanadium redox flow batteries.