Lee Soobeom, Kim Minsoo, Park Jihan, Choi Jinyeong, Kang Joonhee, Park Minjoon
Department of Nanoenergy Engineering, Pusan National University, 50, Busan daehak-ro 63 beon-gil 2, Geumjeong-gu, Busan46241, Republic of Korea.
Research Center of Energy Convergence Technology, Pusan National University, Busandaehak-ro 63beon-gil 2, Geumjeong-gu, Busan, 46241, Republic of Korea.
ACS Appl Mater Interfaces. 2023 Feb 8;15(5):7002-7013. doi: 10.1021/acsami.2c22554. Epub 2023 Jan 30.
Aqueous zinc-based redox flow batteries are promising large-scale energy storage applications due to their low cost, high safety, and environmental friendliness. However, the zinc dendritic growth has depressed the cycle performance, stability, and efficiency, hindering the commercialization of the zinc-based redox flow batteries. We fabricate the carbon felt modified with bimodal sized tin and copper clusters (SCCF) with the electrometallic synthesis in a continuous-flow cell. The SCCF electrode provides a larger zinc nucleation area and lower overpotential than pristine carbon felt, which is ascribed to the well-controlled interfacial interaction of bimodal tin and copper particle clusters by suppressing unwanted alloy formation. The zinc symmetric flow battery and the zinc-based hybrid redox flow battery show the improved zinc plating and stripping efficiency. The SCCF electrode exhibits 75% improved cycling stability compared to the pristine carbon felt electrode in the zinc symmetric flow battery. Notably, the high-voltage aqueous zinc-vanadium redox flow battery demonstrates a high average cell voltage of 2.31 V at 40 mA cm, showing a Coulombic efficiency of 99.9% and an energy efficiency of 87.6% for 100 cycles. We introduce a facile strategy to suppress the zinc dendritic growth, enhancing the performance of the zinc-based redox flow batteries.
水系锌基氧化还原液流电池因其低成本、高安全性和环境友好性而在大规模储能应用中具有广阔前景。然而，锌枝晶生长降低了电池的循环性能、稳定性和效率，阻碍了锌基氧化还原液流电池的商业化进程。我们通过连续流动电池中的电金属合成法制备了用双峰尺寸的锡和铜簇修饰的碳毡（SCCF）。与原始碳毡相比，SCCF电极提供了更大的锌成核面积和更低的过电位，这归因于通过抑制不需要的合金形成对双峰锡和铜颗粒簇的界面相互作用进行了良好控制。锌对称液流电池和锌基混合氧化还原液流电池的锌电镀和剥离效率都有所提高。在锌对称液流电池中，与原始碳毡电极相比，SCCF电极的循环稳定性提高了75%。值得注意的是，高压水系锌钒氧化还原液流电池在40 mA cm时表现出2.31 V的高平均电池电压，在100次循环中库仑效率为99.9%，能量效率为87.6%。我们引入了一种简便的策略来抑制锌枝晶生长，提高锌基氧化还原液流电池的性能。
