构建3D交联宏分子网络作为超稳定的Zn金属阳极的高效接口层
Yi-Fan Qu1, Jia-Wei Qian1, Feng Zhang1
1Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, CAS Key Laboratory of Mechanical Behavior and Design of Materials (LMBD), School of Engineering Science, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|November 20, 2024
概括
在阳极上的一种新的土豆粉接口层防止了水性离子电池 (AZIB) 中的树生长和寄生反应,显著提高了电池的寿命和稳定性.
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:
- 水性离子电池 (AZIB) 具有高容量和安全性,但在阳极上遭受虫生长和寄生反应.
- 这些问题限制了AZIB的耐用性和实际应用.
研究的目的:
- 开发AZIB中金属阳极的接口层,以抑制树突形成和寄生反应.
- 为了提高AZIB的自行车稳定性和性能.
主要方法:
- 使用离子结合的土豆粉 (StZ) 作为Zn薄膜 (StZ-Zn) 上的接口层,制造3D交联宏分子网络.
- 利用密度函数理论 (DFT),分子动力学 (MD),COMSOL模拟和现场拉曼光谱来研究接口属性.
- 经过测试的StZ-Zn处理器StZ-Zn对称细胞和StZ-Zn处理器NaV3O8·1.5H2O全细胞.
主要成果:
- 该StZ接口层有效地抑制了的演化,并通过促进溶解和降低水度来调节Zn2+流量.
- 已证明没有树的沉积和均的Zn2+运输.
- 在5 mA cm-2下,StZ-Zn对称电池实现了4800小时的寿命,累计容量为12000 mAh cm-2.
- 全电池在5 A g-1下经过2500个周期的稳定运行,容量保留92%
结论:
- 开发的StZ接口层是提高AZIB中金属阳极性能和耐久性的有希望的策略.
- 这种方法解决了AZIB技术的关键挑战,为更安全,更有效的储能解决方案铺平了道路.
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