The Poor Academic’s DC-Offset for Reversing Polarity in Electrochemical Cells: Application to Redox Flow Cells

The Poor Academic’s DC-Offset for Reversing Polarity in Electrochemical Cells: Application to Redox Flow Cells
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可怜的学术界用于反转电化学电池极性的直流偏移:在氧化还原流通池中的应用

DOI:
10.1149/1945-7111/ac91a8
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发表时间:
2022
影响因子:
3.9
通讯作者:
Aziz, Michael J.
Aziz, Michael J.
中科院分区:
工程技术4区
文献类型:
--
作者:
Amini, Kiana;Fell, Eric M.;Aziz, Michael J.

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我们提供了一种简单而廉价的手动直流偏置方法,用于将电池循环器的可接受电压范围扩展到负电压,而不会干扰被测电化学电池的实际运行,也不会超出电池循环器仪器的电压规格。我们描述了该方法的工作原理,并通过使用成分对称电池、开路电压为零和满电池配置进行短期和长期氧化还原液流电池循环来验证所提出的设置。该方法可用于扩展电池循环器仪表的能力,以操作任何需要极性反转的电化学电池。应用包括其他对称电池(如锂离子电池)的循环,实现电活性物质恢复或再平衡电化学电池的极性反转步骤,以及用于电化学合成的交替极性。
We provide a simple and inexpensive manual DC-offset method for extending the accepted voltage range of a battery cycler to negative voltages, without interfering with the actual operation of the electrochemical cell under the test or exceeding the voltage specs of the battery cycler instrument. We describe the working principles of the method and validate the proposed setup by operating short-term and long-term redox flow battery cycling using compositionally symmetric cell, with open-circuit voltage of zero, and full cell configurations. The method can be used to extend the capability of battery cycler instrumentation to operate any electrochemical cell that requires the polarity to be reversed during operation. Applications include cycling of other symmetric cells (eg, Li-ion cells), implementation of polarity reversal steps for rejuvenation of electroactive species or rebalancing electrochemical cells, and alternating polarity for electrochemical synthesis.
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影响因子: 2.1
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