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电子捐赠结合效应调制Zn2+ 对于没有分离器的水性电池的减少反应
Zhihao Sun1, Fanxing Bu2, Yanyan Zhang1
1Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Molecular Engineering of Polymers, and School of Chemistry and Materials, Fudan University, Shanghai, 200433, China.
Angewandte Chemie (International ed. in English)
|March 4, 2024
概括
这项研究引入了基于的水性电池的新型联体缓冲层,有效地防止没有厚厚的分离器的树突. 这项创新提高了电池性能和能量密度,以实现更安全,更高效的能源存储.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于的水性电池 (ZABs) 具有成本效益和高容量,但受到树形成的影响.
- 现有的Zn表面修改通常需要厚厚的分离器,限制体积能量密度.
- 树的生长是ZABs实际应用的一个主要障碍.
研究的目的:
- 开发一种集成的解决方案,以抑制树和增强Zn2+转移在ZABs中.
- 为传统的相间层和额外的分离器提供一个全合一的配体缓冲层作为替代方案.
- 提高ZABs的体积能量密度和循环稳定性.
主要方法:
- 在现场电化学数字全息图可视化Zn2+的转移和沉积.
- 实验性表征 (例如,SEM,XRD) 和密度函数理论 (DFT) 模拟.
- 用拟议的缓冲层制造和测试对称ZAB和整个囊细胞.
主要成果:
- 连接体缓冲层 (大约. 20μm) 有效调节了Zn2+的行为,防止了树岩的形成.
- 缓冲层中的catechol组通过p-π结合加速了Zn2+还原反应 (ZRR).
- 实现了低极化 (<28.2 mV),长寿命 (4950小时在5 mA cm-2),以及高体积能量密度 (99.2 Wh L-1).
结论:
- 开发的全合一的配体缓冲层使得"无分离器"和"无状"的ZAB系统成为可能.
- 通过结合效应加速的ZRR是高性能水性电池的关键.
- 这种方法为先进的金属阳极和高能水性电池铺平了道路.
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