Journal of Power Sources ( IF 8.1 ) Pub Date : 2023-01-05 , DOI: 10.1016/j.jpowsour.2023.232628 Zichen Qi , Ting Xiong , Zhi Gen Yu , Fanbo Meng , Bo Chen , Hong Xiao , Junmin Xue
Rechargeable aqueous zinc-ion batteries are attractive candidates as energy storage technology, but the uncontrollable Zn dendrite formation and low stripping/plating coulombic efficiency when using bare Zn metal foil as anode have severely limit the battery reliability and energy density. Thus, to develop a more robust ZIB anode with lower extent of dendrite growth, Zn–Al alloy is proposed in this work. The passivating Al2O3 shell formed on the Al phase can provide two key functions; (1) selective electrochemical stripping of Zn due to electrochemically inert Al2O3, and (2) guiding the electrodeposition of Zn on the available Zn sites. The as-prepared Zn–Al alloy anode is able to outperform the bare Zn anode as bare Zn anode shows signs of short circuit after cycling. When paired with V6O13 cathode, the Zn–Al//V6O13 cell delivers enhanced rate performance and a nearly 95% capacity retention after 1000 cycles at 3 A g−1, with a specific capacity of 280 mA h g−1. The strategy demonstrated that Zn–Al alloy is suitable for aqueous zinc-ion batteries due to its low corrosion rate, low dendrite formation, low corrosion current, and high capacity retention.
中文翻译:
通过 Zn-Al 合金化与空间受限的锌储层抑制水系电池中锌枝晶的生长
可充电水系锌离子电池作为储能技术是很有吸引力的候选者,但是当使用裸锌金属箔作为阳极时,无法控制的锌枝晶形成和低剥离/电镀库仑效率严重限制了电池的可靠性和能量密度。因此,为了开发一种枝晶生长程度较低的更坚固的 ZIB 负极,本文提出了 Zn-Al 合金。在 Al 相上形成的钝化 Al 2 O 3壳可以提供两个关键功能;(1) 由于电化学惰性的 Al 2 O 3选择性电化学剥离 Zn, 和 (2) 引导 Zn 在可用 Zn 位点上的电沉积。所制备的 Zn-Al 合金阳极能够优于裸 Zn 阳极,因为裸 Zn 阳极在循环后显示出短路迹象。当与 V 6 O 13阴极配对时,Zn–Al//V 6 O 13电池提供增强的倍率性能和在 3 A g −1 下 1000 次循环后的近 95% 的容量保持率,比容量为 280 mA h g − 1 . 该策略表明,锌铝合金具有低腐蚀速率、低枝晶形成、低腐蚀电流和高容量保持率等优点,适用于水系锌离子电池。