Naveed Ahmad, Yang Huijun, Shao Yuyan, Yang Jun, Yanna Nuli, Liu Jun, Shi Siqi, Zhang Liwen, Ye Anjiang, He Bing, Wang Jiulin
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
Adv Mater. 2019 Sep;31(36):e1900668. doi: 10.1002/adma.201900668. Epub 2019 Jul 22.
Dendrite and interfacial reactions have affected zinc (Zn) metal anodes for rechargeable batteries many years. Here, these obstacles are bypassed via adopting an intrinsically safe trimethyl phosphate (TMP)-based electrolyte to build a stable Zn anode. Along with cycling, pristine Zn foil is gradually converted to a graphene-analogous deposit via TMP surfactant and a Zn phosphate molecular template. This novel Zn anode morphology ensures long-term reversible plating/stripping performance over 5000 h, a rate capability of 5 mA cm , and a remarkably high Coulombic efficiency (CE) of ≈99.57% without dendrite formation. As a proof-of-concept, a Zn-VS full cell demonstrates an ultralong lifespan, which provides an alternative for electrochemical energy storage devices.
多年来，枝晶和界面反应一直影响着用于可充电电池的锌（Zn）金属阳极。在此，通过采用本质安全的基于磷酸三甲酯（TMP）的电解质来构建稳定的锌阳极，绕过了这些障碍。随着循环的进行，原始锌箔通过TMP表面活性剂和磷酸锌分子模板逐渐转化为类似石墨烯的沉积物。这种新型的锌阳极形态确保了超过5000小时的长期可逆镀覆/剥离性能、5 mA cm 的倍率性能以及约99.57%的极高库仑效率（CE），且无枝晶形成。作为概念验证，锌-钒硫化物全电池展示出超长的寿命，为电化学储能装置提供了一种替代方案。
