Yu Yikang, Liu Yadong, Xie Jian
School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.
Department of Mechanical and Energy Engineering, Purdue School of Engineering and Technology, Indiana University - Purdue University Indianapolis, Indianapolis, Indiana 46202, United States.
ACS Appl Mater Interfaces. 2021 Jan 13;13(1):18-33. doi: 10.1021/acsami.0c17302. Epub 2020 Dec 31.
Li metal has been widely recognized as a promising anode candidate for high-energy-density batteries. However, the inherent limitations of Li metal, that is, the low Coulombic efficiency and dendrite issues, make it still far from practical applications. In short, the low Coulombic efficiency shortens the cycle life of Li metal batteries, while the dendrite issue raises safety concerns. Thanks to the great efforts of the research community, prolific fundamental understanding as well as approaches for mitigating Li metal anode safety have been extensively explored. In this Review, Li electrochemical deposition behaviors have been systematically summarized, and recent progress in electrode design and electrolyte system optimization is reviewed. Finally, we discuss the future directions, opportunities, and challenges of Li metal anodes.
锂金属已被广泛认为是高能量密度电池有前景的负极候选材料。然而，锂金属的固有局限性，即低库仑效率和枝晶问题，使其仍远未达到实际应用。简而言之，低库仑效率缩短了锂金属电池的循环寿命，而枝晶问题则引发了安全担忧。得益于研究界的巨大努力，人们对锂金属负极安全性的大量基本认识以及缓解措施已得到广泛探索。在本综述中，系统总结了锂的电化学沉积行为，并综述了电极设计和电解质体系优化方面的最新进展。最后，我们讨论了锂金属负极的未来方向、机遇和挑战。
