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苏奇尼尼特电解质添加剂用于稳定水性金属电池
Yang Yu1,2, Li Lin1, Yu-Hang Liu1
1School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.
ACS applied materials & interfaces
|December 21, 2024
概括
开发用于离子电池的新型水性电解质至关重要. 这项研究设计了succinonitrile (SN) 网络电解质,以提高循环寿命并抑制树突,实现了显著的性能.
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:
- 水性离子电池 (ZIB) 为离子电池提供了更安全,更便宜,更环保的替代品.
- 传统的硫酸电解质在ZIB中面临周期寿命和树突形成的局限性.
- 先进的电解质设计对于高性能ZIB至关重要.
研究的目的:
- 为ZIBs开发一种新的电解质系统,以克服传统电解质的局限性.
- 为了提高循环稳定性和抑制ZIBs中的树生长.
- 设计一种电解质,促进均的沉积和稳定的固体电解质介相 (SEI) 形成.
主要方法:
- 水性Zn(OTf) 2溶液与尼 (SN) 进行工程,以形成网络电解质.
- 研究了SN对结网和水分子反应性的影响.
- 分析了形成的SEI层的组成,重点是Zn3N2/ZnF2形成.
- 组装了对称和完整的ZIB细胞,并对循环性能和容量保留进行了测试.
主要成果:
- 苏奇尼尼特网络电解质破坏了键并减轻了副作用.
- SN添加剂降低了水的反应性,促进了平滑的沉积和稳定的Zn3N2/ZnF2 SEI.
- 对称细胞表现出异常的循环稳定性,持续877小时.
- 充满电池保留了令人印象深刻的容量151.2mAhg-1在2000个循环后在5Ag-1.
结论:
- 工程 Succinonitrile 网络电解质是高性能水性离子电池的一个有希望的策略.
- 这种方法有效地提高了循环寿命,并通过控制电解质结构和SEI形成来抑制树突.
- 这些发现为开发下一代金属电池的先进电解质铺平了道路.
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