TY - JOUR AU - Wang, Ziqi AU - Dong, Liubing AU - Huang, Weiyuan AU - Jia, Hao AU - Zhao, Qinghe AU - Wang, Yidi AU - Fei, Bin AU - Pan, Feng PY - 2021/02/15 Y2 - 2024/03/28 TI - Simultaneously Regulating Uniform Zn2+ Flux and Electron Conduction by MOF/rGO Interlayers for High-Performance Zn Anodes JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 13 IS - SE - Articles DO - 10.1007/s40820-021-00594-7 UR - https://www.nmlett.org/index.php/nml/article/view/839 SP - 73 AB - <p>Owing to the merits of low cost, high safety and environmental benignity, rechargeable aqueous Zn-based batteries (ZBs) have gained tremendous attention in recent years. Nevertheless, the poor reversibility of Zn anodes that originates from dendrite growth, surface passivation and corrosion, severely hinders the further development of ZBs. To tackle these issues, here we report a Janus separator based on a Zn-ion conductive metal–organic framework (MOF) and reduced graphene oxide (rGO), which is able to regulate uniform Zn<sup>2+</sup> flux and electron conduction simultaneously during battery operation. Facilitated by the MOF/rGO bifunctional interlayers, the Zn anodes demonstrate stable plating/stripping behavior (over 500&nbsp;h at 1&nbsp;mA&nbsp;cm<sup>−2</sup>), high Coulombic efficiency (99.2% at 2&nbsp;mA&nbsp;cm<sup>−2</sup> after 100 cycles) and reduced redox barrier. Moreover, it is also found that the Zn corrosion can be effectively retarded through diminishing the potential discrepancy on Zn surface. Such a separator engineering also saliently promotes the overall performance of Zn|MnO<sub>2</sub> full cells, which deliver nearly 100% capacity retention after 2000 cycles at 4 A g<sup>−1</sup> and high power density over 10&nbsp;kW&nbsp;kg<sup>−1</sup>. This work provides a feasible route to the high-performance Zn anodes for ZBs.</p><p>Highlights:</p><p>1 Dendrite-free stable Zn plating/stripping was achieved for over 500 h at 2 mA cm<sup>−2</sup>.<br>2 No short-circuit for 10 mAh cm<sup>−2</sup> of Zn plating.<br>3 Zn|MnO<sub>2</sub> cells delivered nearly 100% capacity retention over 2000 cycles.</p> ER -