无粘合剂的CNT修改的优秀电极,用于全氧化回氧流电池
Nitika Devi1, Prabhakar Singh2, Yong-Song Chen1
1Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, 168 University Rd., Minhsiung Township, Chiayi County 621301, Taiwan.
Nanomaterials (Basel, Switzerland)
|May 10, 2024
概括
这项研究开发了碳纳米管改性石墨电极 (CNT-GFs) 用于全氧化还原流电池 (VRFBs). CNT-GF显著提高了VRFB的性能,显示出更高的效率和稳定性,特别是在作为正电极使用时.
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:
- 全氧化还原流电池 (VRFB) 对于电网规模的能源存储至关重要.
- 电极材料的性能直接影响VRFB的效率和寿命.
- 具有高表面积的多孔石墨感觉是首选的电极材料.
研究的目的:
- 开发一种简单的,无粘合剂的方法,用于制造稳定的碳纳米管改性石墨电极 (CNT-GFs).
- 与传统电极相比,评估CNT-GF的电化学特性和VRFB性能.
- 调查CNT修改对反应动力学和电池整体效率的影响.
主要方法:
- 用热处理的石墨电极 (H-GFs) 的制备.
- 用同质碳纳米管 (CNT) 溶液浸涂H-GF,以创建CNT-GF.
- 使用循环电量计 (CV) 和电化学阻抗光谱 (EIS) 的电化学表征.
- 使用CNT-GF的VRFB的性能测试,特别是在正电极位置.
主要成果:
- 与H-GF相比,CNT-GF表现出较低的阻力,增强的反应电流和更好的可逆性.
- 带有CNT-GF的VRFB显著提高了性能,特别是当CNT-GF作为正电极 (P-CNT-GF) 时.
- 配置为P-CNT-GF的VRFB实现了高效率 (例如,在100 mA cm-2下82%的能效).
- 在200 mA cm−2的300个周期中,用CNT-GFs证明了稳定的循环性能.
结论:
- 无粘合剂的CNT修改方法有效地提高了VRFB的石墨电极性能.
- CNT-GF改善了两种氧化还原对的电化学动力学,从而提高了电池的性能.
- 开发的CNT-GF为推进VRFB技术提供了有前途的途径,提高了效率和稳定性.
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