Liu Zhu, Yi Pengshu, Ma Longli, Yuan Yuhang, Wang Yuan, Ye Chuming, Ye Mingxin, Shen Jianfeng
Institute of Special Materials and Technology, Fudan University, Shanghai 200433, PR China; Department of Materials Science, Fudan University, Shanghai 200433, PR China.
Institute of Special Materials and Technology, Fudan University, Shanghai 200433, PR China.
J Colloid Interface Sci. 2025 Feb;679(Pt A):1231-1241. doi: 10.1016/j.jcis.2024.10.062. Epub 2024 Oct 14.
The practical application of aqueous zinc-ion batteries (AZBs) as attractive energy storage devices is severely hampered by the uncontrollable zinc dendrite growth on the metal anode. Here, a lightweight and flexible free-standing membrane of MXene/Ag nanowires (AgNWs) was synthesized via vacuum filtration to support the zinc anode. The 3D cross-linked network structure provides ample space for densely packed zinc electrodeposition. Zincophilic AgNWs that exhibit a low lattice plane mismatch with zinc lower the nucleation barrier for zinc, inducing uniform nucleation and lateral growth of zinc on the substrate. In addition, the 3D network framework effectively reduces the local current density and area capacity of the anode, creating a uniform electric field that is not conducive to zinc dendrite formation. Consequently, the highly reversible Zn@MXene/AgNWs composite anode exhibits long cycle stability of 1000 h at 2.0 mA cm, 1.0 mAh cm in the symmetrical battery. The full battery assembled with a sodium vanadate (NVO) cathode demonstrates excellent rate performance and long cycle life (2000 cycles at 5.0 A/g). The design of zincophilic hosts with high lattice plane matching provides a promising strategy for realizing dendrite-free zinc anodes for AZBs.
水系锌离子电池（AZBs）作为一种极具吸引力的储能装置，其实际应用受到金属阳极上不可控的锌枝晶生长的严重阻碍。在此，通过真空过滤合成了一种由MXene/银纳米线（AgNWs）组成的轻质柔性自支撑膜，以支撑锌阳极。三维交联网络结构为密集堆积的锌电沉积提供了充足的空间。与锌晶格平面失配低的亲锌AgNWs降低了锌的成核势垒，诱导锌在基底上均匀成核和横向生长。此外，三维网络框架有效地降低了阳极的局部电流密度和面积容量，产生了不利于锌枝晶形成的均匀电场。因此，高度可逆的Zn@MXene/AgNWs复合阳极在对称电池中于2.0 mA cm²、1.0 mAh cm²的条件下表现出1000小时的长循环稳定性。与钒酸钠（NVO）阴极组装的全电池表现出优异的倍率性能和长循环寿命（在5.0 A/g下循环2000次）。具有高晶格平面匹配的亲锌主体的设计为实现AZBs无枝晶锌阳极提供了一种有前景的策略。
