Chen Zibo, Wu Qiang, Han Xuran, Wang Cheng, Chen Jialu, Hu Tao, He Qian, Zhu Xinyue, Yuan Du, Chen Jianyu, Zhang Yu, Yang Lijun, Ma Yanwen, Zhao Jin
State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, Nanjing, 210023, P. R. China.
College of Materials Science and Engineering, Changsha University of Science and Technology, Hunan, 410004, P. R. China.
Angew Chem Int Ed Engl. 2024 Apr 22;63(17):e202401507. doi: 10.1002/anie.202401507. Epub 2024 Mar 14.
Rechargeable aqueous zinc batteries are promising but hindered by unfavorable dendrite growth and side reactions on zinc anodes. In this study, we demonstrate a fast melting-solidification approach for effectively converting commercial Zn foils into single (002)-textured Zn featuring millimeter-sized grains. The melting process eliminates initial texture, residual stress, and grain size variations in diverse commercial Zn foils, guaranteeing the uniformity of commercial Zn foils into single (002)-textured Zn. The single (002)-texture ensures large-scale epitaxial and dense Zn deposition, while the reduction in grain boundaries significantly minimizes intergranular reactions. These features enable large grain single (002)-textured Zn shows planar and dense Zn deposition under harsh conditions (100 mA cm, 100 mAh cm), impressive reversibility in Zn||Zn symmetric cell (3280 h under 1 mA cm, 830 h under 10 mAh cm), and long cycling stability over 180 h with a high depth of discharge value of 75 %. This study successfully addresses the issue of uncontrollable texture formation in Zn foils following routine annealing treatments with temperatures below the Zn melting point. The findings of this study establish a highly efficient strategy for fabricating highly reversible single (002)-textured Zn anodes.
可充电水系锌电池前景广阔，但受锌负极上不利的枝晶生长和副反应阻碍。在本研究中，我们展示了一种快速熔化-凝固方法，可有效将商业锌箔转化为具有毫米级晶粒的单一（002）织构锌。熔化过程消除了各种商业锌箔中的初始织构、残余应力和晶粒尺寸变化，确保将商业锌箔均匀转化为单一（002）织构锌。单一（002）织构确保大规模外延和致密的锌沉积，而晶界减少显著降低了晶间反应。这些特性使大晶粒单一（002）织构锌在苛刻条件下（100 mA cm，100 mAh cm）呈现平面且致密的锌沉积，在锌||锌对称电池中具有令人印象深刻的可逆性（1 mA cm下3280 h，10 mAh cm下830 h），并在180 h以上具有长循环稳定性，放电深度高达75%。本研究成功解决了在低于锌熔点的温度下进行常规退火处理后锌箔中不可控织构形成的问题。本研究结果建立了一种制造高可逆单一（002）织构锌负极的高效策略。
