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通过超分子定机制实现可逆阳极的稳定定向沉积
Xiaoting Lin1, Yufei Zhang2,1, Zhenxin Lin1
1School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
ACS applied materials & interfaces
|November 6, 2024
概括
一个新的-多超分子网络稳定水性电池中的阳极,防止树突和进化. 这一突破使得高稳定性和可逆性化/脱落用于先进的能源存储.
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
- 超分子化学 超分子化学
背景情况:
- 水性离子电池面临来自演化反应 (HER),树突和阳极侧反应的挑战.
- 这些问题限制了电池性能,循环寿命和安全性,阻碍了实际应用.
研究的目的:
- 使用 Zn-多超分子网络 (ZPN@Zn) 设计一个稳定的阳极.
- 研究阳极稳定机制及其对电池性能的影响.
- 为了证明无树和高度可逆的涂/脱落的潜力.
主要方法:
- 合理设计和合成一个Zn-多超分子网络.
- 理论计算和实验验证超分子层的功能.
- 电化学测试包括涂层/脱落,循环稳定性和全细胞性能评估.
主要成果:
- 该ZPN@Zn层通过通过键捕获水分子,有效地抑制HER.
- 超分子定促进了快速的Zn2+离子补充,并促进了优先的 (002) 平面沉积.
- 实现了卓越的稳定性 (1200小时在20 mA cm-2) 和高库伦比效率 (99.86%超过3000个周期).
- 全细胞表现出了显著的寿命 (25,000个周期在20Ag-1).
结论:
- 对Zn阳极的超分子调制为实现无树的水性离子电池提供了一个有前途的策略.
- 采用ZPN@Zn方法显著提高了阳极稳定性和电化学可逆性.
- 这项工作为高性能和持久的水性离子储能系统铺平了道路.
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