由素衍生碳启用的先进电极,用于高性能氧还原流电池的氧还原流电池
Xinyan He1, Liangyu Li1, Su Yan1
1College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China; Institute of Energy Storage Technology, Changsha University of Science & Technology, Changsha 410114, China.
Journal of colloid and interface science
|October 7, 2023
概括
研究人员使用丰富的材料素开发了用于氧还原流电池 (VRFB) 的先进电极. 这些素衍生的碳电极显著提高VRFB的性能和寿命.
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:
- 氧化还原流电池 (VRFB) 对于集成间歇性可再生能源至关重要.
- 电极性能直接影响VRFB的能效和功率密度.
- 开发具有成本效益,高性能电极对于VRFB的商业化至关重要.
研究的目的:
- 研究素作为制造高性能VRFB电极的前体.
- 为了增强碳 (CF) 电极的电化学活性和水友性.
- 为了评估VRFB的性能和循环稳定性,使用素衍生碳改性CF (Lignin-CF) 电极.
主要方法:
- 红经过热分解产生无形碳粒子.
- 碳颗粒被用来修改碳 (CF) 电极,从而产生了 Lignin-CF.
- 将lignin-CF的电化学活性与原始和加热裸体CF进行了比较.
- 评估了VRFB性能,包括能效 (EE),电压效率 (VE) 和功率密度,使用Lignin-CF作为正极.
主要成果:
- 素衍生的碳颗粒有效地覆盖了CF表面,增加了活性点和水友性.
- 与控制电极相比,Lignin-CF对VO2+/VO2+氧化还原对表现出更高的电化学活性.
- 使用利格宁-CF的VRFB在1000个周期 (16天) 的100mA cm-2.0时实现了高平均EE (83.3%) 和VE (85.0%).
- 记录了高功率密度为1053.2mW cm-2.
- 据报道,Lignin-CF电极的循环寿命比许多已修改的CF电极更长.
结论:
- 是高性能VRFB电极材料的可行,具有成本效益的前体.
- 由素衍生的碳修饰显著提高了VRFB的电化学性能和耐用性.
- 这种方法为开发用于先进VRFB的负担得起的电极提供了一个有希望的策略.
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