高功率的酸氧化还原流电池与铁功能化碳电极
Abena A Williams1, Robert K Emmett2, Mark E Roberts1
1Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, SC 29604-0909, USA. mrober9@clemson.edu.
Physical chemistry chemical physics : PCCP
|June 8, 2023
概括
带有铁改性碳纳米管电极的 (ZI) 氧化还原流电池 (RFB) 的性能得到了改善. 这些先进的ZI RFB提供了更高的功率密度和更低的电阻,用于电网规模的储能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 酸 (ZI) 氧化还原流电池 (RFB) 由于其高能量密度,成本效益和环境效益,对电网规模的储能充满希望.
- 提高电极性能对于提高RFB效率和输出功率至关重要.
研究的目的:
- 研究将氧化还原活性铁颗粒纳入ZI RFB碳纳米管 (CNT) 电极中的影响.
- 评估电化学性能增强,包括放电电压,功率密度和电荷传输电阻.
主要方法:
- 使用由碳纳米管组成的电极制造ZI RFB,其功能与氧化还原活性铁颗粒相结合.
- 使用极化曲线分析性能指标的电化学表征.
- 使用铁改性电极的ZI RFB与使用惰性碳电极的ZI RFB的比较.
主要成果:
- 与惰性电极相比,用铁修改的CNT电极显著降低了90%的电荷传递电阻.
- 功率密度增加了100% (从44mW cm-2增加到90mW cm-2) 在110mA cm-2.
- 在含铁电极的电池中观察到较低的质量转移电阻,以及更高的放电电压.
结论:
- 将氧化还原活性铁颗粒纳入 CNT 电极是提高 ZI RFB 性能的一种有效策略.
- 这些修改后的电极导致功率密度和效率的大幅提高,使ZI RFB更适合于电网规模的应用.
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