Trichome-like Carbon-Metal Fabrics Made of Carbon Microfibers, Carbon Nanotubes, and Fe-Based Nanoparticles as Electrodes for Regenerative Hydrogen/Vanadium Flow Cells
Trichome-like Carbon-Metal Fabrics Made of Carbon Microfibers, Carbon Nanotubes, and Fe-Based Nanoparticles as Electrodes for Regenerative Hydrogen/Vanadium Flow Cells
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由碳微纤维、碳纳米管和铁基纳米粒子制成的毛状碳金属织物作为再生氢/钒流动电池的电极
DOI：
10.1021/acsanm.1c02195
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发表时间：
2021
影响因子：
5.9
通讯作者：
Chakrabarti B
中科院分区：
文献类型：
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作者：
Chakrabarti B
再生氢/钒液流电池（rhvfc）需要结合纳米、微、毫秒级电化学、催化和机械性能的电极结构。目前使用的碳基电极可能导致电解质利用率差、动力学慢、电极快速劣化，导致电化学性能不理想，阻碍了RHVFC的商业可行性。为了解决这个问题，我们在这里展示了由碳微纤维、碳纳米管和铁基纳米颗粒制成的毛状碳金属织物（CMFs）作为催化层和电极在rhvfc中的应用，并评估了它们的关键优点。CMFs与商用碳布相结合，不仅提供高功率密度~ 645 mW cm-2 (~ 0.82 V)，而且在150 mA cm-2下具有优异的循环性能，产生接近100%的能量效率和高平均放电容量~ 23 Ah L-1（~ 90%的电解质利用率）。这些电化学结果以及通过x射线断层扫描评估的电极微观结构特征和预计成本分析表明，在设计和开发能够承受RHVFC循环条件而不影响电化学性能的定制电极方面发生了重大变化。
Regenerative hydrogen/vanadium flow cells (RHVFCs) require electrode architectures combining electrochemical, catalytic, and mechanical properties across nano-, micro-, and milliscales. The use of current carbon-based electrodes can lead to poor electrolyte utilization, slow kinetics, and rapid electrode deterioration, resulting in suboptimal electrochemical performance and hindering RHVFC’s commercial viability. To address this, we here demonstrate the application of trichome-like carbon-metal fabrics (CMFs) made of carbon microfibers, carbon nanotubes, and iron-based nanoparticles as both a catalytic layer and electrode in RHVFCs by evaluating their key figures of merit. CMFs in combination with commercial carbon cloth not only offer a high power density ∼645 mW cm–2(∼0.82 V) but also excellent cycling performance at 150 mA cm–2, yielding nearly 100% energy efficiency and a high average discharge capacity of ∼23 Ah L–1(∼90% electrolyte utilization). These electrochemical results together with electrode microstructural features assessed by X-ray tomography and projected cost analysis represent a step change in the design and development of tailored electrodes capable of withstanding RHVFC cycling conditions without compromising electrochemical performance.
氢-钒可逆燃料电池交叉研究
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
R. Dowd
通讯作者：
R. Dowd
全钒和钒/氧氧化还原液流电池的一维数学模型
DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
Ching;H. K. Yeoh;M. H. Chakrabarti
通讯作者：
M. H. Chakrabarti