锂离子电池负极材料力学行为研究进展

Advance in lithiation mechanics of anode materials in lithium ion battery

可充电锂离子电池被广泛应用于便携式电子设备、电动汽车等领域。随着其应用领域的快速发展,迫切需要进一步提高其能量密度。本文综述对目前广泛研究的高能量密度负极材料(如硅、锗)在充/放电过程中力学行为的研究进展;基于最新实验手段及数值模拟方法,介绍负极材料由于电化学-力学耦合所造成的变形和破坏,并讨论相关技术在其他电池系统研究中的应用。

Rechargeable lithium-ion batteries（LIBs）, due to their high energy density and design flexibility, are the most prevailing and promising electrochemical energy storage and conversion devices, and are being widely used in portable electronics and electric vehicles.However, with their wide range applications, an urgent requirement is raised for the further improvement of their energy density. This paper presents an overview of recent advances in understanding the mechanical behavior of high capacity anode materials, i.e., silicon and germanium, in their charging/discharging cycling. Particular emphasis is placed on the state-of-the-art experimental and numerical studies of the deformation and failure of anode materials caused by the electrochemo- mechanical coupling. In addition, possible extension of current techniques to the research of other energy systems is discussed.