Xie Chunlin, Yang Zefang, Zhang Qi, Ji Huimin, Li Yihu, Wu Tingqing, Li Wenbin, Wu Pengfei, Wang Haiyan
Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
Research (Wash D C). 2022 Aug 18;2022:9841343. doi: 10.34133/2022/9841343. eCollection 2022.
The development of zinc-ion batteries with high energy density remains a great challenge due to the uncontrollable dendrite growth on their zinc metal anodes. Film anodes plated on the substrate have attracted increasing attention to alleviate these dendrite issues. Herein, we first point out that both the random crystal orientation and the low metal affinity of the substrate are important factors of zinc dendrite formation. Accordingly, the (1 0 1) fully preferred tin interface layer with high zinc affinity was fabricated by chemical tin plating on (1 0 0) oriented copper. This tin decorated copper substrate can realize high reversible zinc plating/stripping behavior, and full cell using this zinc plated substrate can be operated for more than 1000 cycles with high capacity retention (85.3%) and low electrochemical impedance. The proposed strategy can be also applied to lithium metal batteries, which demonstrates that the substrate orientation regulation and metal affinity design are the promising approaches to achieve dendrite-free metal anode and overcome the challenges of highly reactive metal anodes.
由于锌金属阳极上不可控的枝晶生长，开发高能量密度的锌离子电池仍然是一个巨大的挑战。镀在基底上的薄膜阳极已引起越来越多的关注，以缓解这些枝晶问题。在此，我们首先指出，基底的随机晶体取向和低金属亲和力都是锌枝晶形成的重要因素。因此，通过在（100）取向的铜上进行化学镀锡，制备了具有高锌亲和力的（101）完全择优取向的锡界面层。这种镀锡的铜基底可以实现高可逆的锌电镀/剥离行为，并且使用这种镀锌基底的全电池可以在超过1000次循环中运行，具有高容量保持率（85.3%）和低电化学阻抗。所提出的策略也可以应用于锂金属电池，这表明基底取向调控和金属亲和力设计是实现无枝晶金属阳极和克服高活性金属阳极挑战的有前景的方法。
