一个稳定和能量密集的多硫化物/甲流电池
Mei Ding1,2, Hu Fu1,2, Xuechun Lou1,2
1Institute of Energy Storage Technology, Changsha University of Science & Technology, Changsha 410114, China.
ACS nano
|July 31, 2023
概括
这项研究引入了一种新的硫/ (S/Mn) 氧化还原流电池 (RFB),用于高效的能量存储. S/Mn RFB提供高能量密度和长周期寿命,使其成为一个具有成本效益的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 反氧流电池 (RFB) 对于电网规模的能源存储至关重要.
- 实际应用需要高性能,稳定和经济高效的RFB系统.
- 现有的RFB面临着诸如缓慢动力学和电极不稳定等挑战.
研究的目的:
- 使用聚硫化物和酸开发一种高性能S/Mn RFB.
- 为了提高电极稳定性和催化活性,以改善循环.
- 展示一个可扩展和具有成本效益的储能解决方案.
主要方法:
- 用于聚硫化物电催化物的NiS/Ni泡阳极的制造.
- 为了提高稳定性,开发了用石墨烯修饰的碳 (G/CF) 阴极.
- 利用NaMnO4作为催解剂,由于其高溶解度,使其成为氧化还原活性分子.
- 对S/Mn RFB单元和一个三单元堆进行电化学测试.
主要成果:
- 实现了 67.8 Wh L-1.1 的高能量密度.
- 证明了长周期使用寿命,低容量色率为0.025%h-1.1.
- 据报道,低电解质成本为17.31美元/千瓦时-1.1.
- 经过验证的可扩展性,三细胞堆显示了100个周期 (226.8小时) 的稳定循环.
结论:
- 开发的S/Mn RFB系统为稳定,能源密度高和成本效益高的能源存储提供了一个有前途的方法.
- 优化的电极和电解质组成有助于系统的卓越性能.
- 这一战略为未来的电网规模储能应用提供了一个可行的候选者.
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