Yang Xu, Fu Zhiqiang, Han Ran, Lei Yaojie, Wang Shijian, Zhao Xin, Meng Yuefeng, Liu Hao, Zhou Dong, Aurbach Doron, Wang Guoxiu
Centre for Clean Energy Technology Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.
Angew Chem Int Ed Engl. 2024 Jul 15;63(29):e202405750. doi: 10.1002/anie.202405750. Epub 2024 Jun 7.
The high energy density and cost-effectiveness of chloride-ion batteries (CIBs) make them promising alternatives to lithium-ion batteries. However, the development of CIBs is greatly restricted by the lack of compatible electrolytes to support cost-effective anodes. Herein, we present a rationally designed solid polycationic electrolyte (SPE) to enable room-temperature chloride-ion batteries utilizing aluminum (Al) metal as an anode. This SPE endows the CIB configuration with improved air stability and safety (i.e. free of flammability and liquid leakage). A high ionic conductivity (1.3×10 S cm at 25 °C) has been achieved by the well-tailored coordination structure of the SPE. Meanwhile, the solid polycationic electrolyte ensures stable electrodes|electrolyte interfaces, which effectively inhibit the growth of dendrites on the Al anodes and degradation of the FeOCl cathodes. The Al|SPE|FeOCl chloride-ion batteries showcased a high discharge capacity around 250 mAh g (based on the cathodes) and extended lifespan. Our electrolyte design opens a new avenue for developing low-cost chloride-ion batteries.
氯离子电池（CIBs）的高能量密度和成本效益使其成为锂离子电池有前景的替代品。然而，CIBs的发展受到缺乏兼容电解质以支持具有成本效益的负极的极大限制。在此，我们提出一种合理设计的固体聚阳离子电解质（SPE），以实现使用铝（Al）金属作为负极的室温氯离子电池。这种SPE赋予CIB配置更好的空气稳定性和安全性（即无易燃性和漏液）。通过SPE精心定制的配位结构实现了高离子电导率（25°C时为1.3×10⁻³ S cm⁻¹）。同时，固体聚阳离子电解质确保了稳定的电极|电解质界面，有效抑制了Al负极上枝晶的生长和FeOCl正极的降解。Al|SPE|FeOCl氯离子电池展示了约250 mAh g⁻¹（基于正极）的高放电容量和延长的使用寿命。我们的电解质设计为开发低成本氯离子电池开辟了一条新途径。
