一个超薄的无机分子晶体界面层,用于稳定的 Zn 阳极
Ping Xiao1, Yu Wu1, Kailang Liu1
1State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Angewandte Chemie (International ed. in English)
|August 3, 2023
概括
超薄的Sb2O3层通过确保均的沉积来稳定电池中的阳极,显著地将电池寿命从72小时延长到2800小时. 这种分子晶体方法为改善水性金属电池性能提供了一个新的策略.
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:
- 水性金属电池面临的挑战是阳极树突的生长和副作用.
- 这些问题严重限制了金属电池的周期寿命和整体性能.
研究的目的:
- 引入和评估用于稳定阳极的超薄三氧化 (Sb2O3) 分子晶层.
- 调查Sb2O3改善沉积均性并抑制树突形成的机制.
主要方法:
- 现场光学显微镜和原子力显微镜 (AFM) 用于观察沉积行为.
- 进行了电化学循环测试,以评估带有和没有Sb2O3层的阳极的循环寿命.
- 与传统的三氧化物 (WO3) 层进行了比较.
主要成果:
- 10nm Sb2O3 层促进了均的下层沉积,并抑制了尖端的生长.
- 相比之下,WO3层显示了上层沉积不受控制.
- 保护Sb2O3的阳极表现出显著改善的循环寿命,从72小时延长到2800小时,超过了更厚的WO3层 (900小时).
结论:
- 该Sb2O3分子晶层有效地稳定阳极由于其电子阻断能力和较低的亲和力.
- 这项研究证明了无机分子晶体作为接口层的潜力,可以提高水性金属电池的性能.
- 这些发现为在储能设备中开发先进的接口工程策略开辟了新的途径.
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