材料科学
阳极
电解质
空间电荷
压电
锌
离子
图层(电子)
无机化学
化学工程
复合材料
电极
冶金
电子
物理化学
有机化学
量子力学
物理
工程类
化学
作者
Zhipeng Wen,Zuyang Hu,Xiangwen Wang,Yufei Zhang,Wencheng Du,Minghui Ye,Yongchao Tang,Xiaoqing Liu,Cheng Chao Li
标识
DOI:10.1002/adma.202407390
摘要
Abstract The space charge layer (SCL) dilemma, caused by mobile anion concentration gradient and the rapid consumption of cations, is the fundamental reason for the generation of zinc dendrites, especially under high‐rate discharge conditions. To address the issue, a physical (PbTiO 3 )/chemical (AMPS‐Zn) barrier is designed to construct stable zinc ion flow and disrupt the gradient of anion concentration by coupling the ferroelectric effect with tethered anion electrolyte. The ferroelectric materials PbTiO 3 with extreme‐high piezoelectric constant can spontaneously generate an internal electric field to accelerate the movement of zinc ions, and the polyanionic polymer AMPS‐Zn can repel mobile anions and disrupt the anions concentration gradient by tethering anions. Through numerical simulations and analyses, it is discovered that a high Zn 2+ transference number can effectively weaken the SCL, thus suppressing the occurrence of zinc dendrites and parasitic side reactions. Consequently, an asymmetric cell using the PbTiO 3 @Zn demonstrates a reversible plating/stripping performance for 2900 h, and an asymmetric cell reaches a state‐of‐the‐art runtime of 3450 h with a high average Coulombic efficiency of 99.98%. Furthermore, the PbTiO 3 @Zn/I 2 battery demonstrated an impressive capacity retention rate of 84.0% over 65000 cycles by employing a slender Zn anode.
科研通智能强力驱动
Strongly Powered by AbleSci AI