单次暴露Zn (0002) 平面和可持续的以Zn为导向的增长实现高度可逆的金属电池

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Da Zhang¹, Ziyang Song¹, Ling Miao¹

¹Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092.

Angewandte Chemie (International ed. in English)

|September 19, 2024

概括

研究人员开发了一种可充电金属电池 (ZMB) 的新型阳极,通过设计一个促进均的基板. 这项创新提高了电池的稳定性和寿命,防止了像状岩石生长这样的常见问题.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

树突的生长和的进化是可逆金属电池 (ZMB) 的关键挑战.
实现均的Zn电,特别是在低表面能量Zn (0002) 平面上,对于稳定的ZMB性能至关重要.
目前的方法在创建具有持续单轴晶体方向的阳极时遇到困难,用于 Zn 电极沉积.

研究的目的:

设计一个Zn阳极,促进Zn2+离子的方向性表轴增长,特别是沿着Zn (0002) 平面.
开发一种基板,使单次 (0002) 表面暴露和持续的 Zn 导向生长成为高度可逆的 ZMB.
为了克服当前阳极设计在实现受控Zn电方面存在的局限性.

主要方法:

使用一个蒸汽沉积的金属有机框架,Cu3(C6O6) 2,在一个黄铜基板上.
研究了基板和电沉积Zn阳极之间的格子不匹配.
分析了化Zn2+离子与多孔基板的溶解能量,以引导核化.
用修改后的基质测试了Zn下载RZn细胞的性能.

主要成果:

铜上的Cu3(C6O6) 2薄膜表现出与Zn阳极的低晶格不匹配 (4.24%),促进单 (0002) 平面暴露.
低解溶能 (-1.36 eV) 的Zn2+离子与多孔的Cu3(C6O6) 2膜促进可持续的,沿着 (0002) 表面导向Zn核化.
使用黄铜-Cu3(C6O6) 2基质的Zn基底管能达到高平均库伦比效率99.55%在4000个循环中在10mA cm-2.2时.
已证明可以预防树的生长和进化反应.

结论:

拟议的阳极工程策略成功地创建了单次 (0002) 表面暴露和可持续导向增长的 Zn 阳极.
这种方法导致高度可逆和稳定的金属电池.
该研究为设计下一代ZMB的先进Zn阳极提供了一个有希望的新方向.

关键词:

黄铜基板是一种铜基板.具有高度可逆性的 Zn 阳极.一个单一的Zn (0002) 平面.金属电池电池的使用情况

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