锂离子电池用多孔电极结构设计及制备技术进展

Progress in structure design and preparation of porous electrodes for lithium ion batteries

随着人们对锂离子电池需求的日益增加,高能量密度和高功率密度锂离子电池技术成为研究热点之一。材料改性及新材料开发能有效提高电池的能量密度,除此以外,孔隙率、孔径大小与分布、曲折度及电极组分分布等电极的微观结构参数也是决定电极及电池性能的关键因素。通过优化电极结构设计提升高比能电池的性能逐渐成为人们关注的焦点。本文综述了锂离子电池多孔电极结构设计优化的研究进展,总结了多孔电极结构设计要素及制备方法,最后对电极结构设计优化以及推动新型制备技术的规模化应用在高比能锂离子电池领域的未来发展前景进行展望。

With the increasing demand for lithium-ion batteries,lithium-ion batteries with high energy density and high power density have become one of the research hotspots.Material modification and new material development can effectively increase the energy density of lithium-ion batteries.In addition,the microstructure parameters of the electrode such as porosity,pore size and distribution,tortuosity and electrode composition distribution are also factors that determine the performance of the electrode and battery.Improving the performance of high specific energy batteries by optimizing the electrode structure design has gradually become the focus of attention.The research progress of porous electrode structure design optimization for lithium ion batteries was reviewed in this article,the design factors and preparation methods of porous electrode structure were summarized.Then the future development of electrode structure design optimization and the promotion of novel preparation technologies for large-scale application in the field of high specific energy lithium ion batteries were prospected in the field of high specific energy lithium ion batteries.