电解质
石墨
材料科学
电极
离子
锂(药物)
化学工程
无机化学
电镀(地质)
冶金
化学
有机化学
医学
地质学
工程类
内分泌学
物理化学
地球物理学
作者
Hong Liang,Li Wang,Yufang He,Yaqin Song,Jian Gao,Gang Xu,Hong Xu,Hao Zhang,Xiangming He
标识
DOI:10.1016/j.cej.2022.140290
摘要
• The proposed electrolyte enables highly reversible of lithium on graphite anodes. • The proposed electrolyte extends capacity of commercial graphite to 440.2 mAh g -1 . • The proposed electrolyte boosts the energy density of the conventional pouch cells. • The proposed electrolyte perfectly adapts to state-of-the-art manufacturing. • The critical parameters for this high-performance hybrid anode are highlighted. It has always been our unrelenting effort to continuously enhance the energy density of lithium-ion batteries (LIBs). Energy density of LIBs is generally improved by optimizing the electrode materials and battery architecture. Increasing the energy density based on existing facilities and technologies is still considerably challenging. Herein, we propose a compatible electrolyte to purposely plate metallic lithium on graphite anode and widen the charging window to 4.6 V. It realizes highly reversible lithium plating/stripping behavior in the graphite anode pores. The graphite anode is transformed into a graphite/lithium hybrid anode, providing a significantly higher capacity than its nominal value. The optimized electrolyte enables conventional graphite||high-nickel layered cathode pouch cells to deliver 18% increased energy density. It exhibits excellent compatibility with graphite and lithium, quick wettability and the ability to build a stable interface, all of which are essential for realizing high-energy-density hybrid anodes. Additional capacity can be further increased by reasonably tuning the porosity of the graphite anode. The improvement is easy to implement and works seamlessly with state-of-the-art manufacturing processes. This work demonstrates a cost-effective and facile approach to increasing the energy density of existing batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI