Functional organic 7,7,8,8‐tetracyanoquinodimethane artificial layers for the dendrite suppressed lithium metal anodes  

作　　者：Qing Liu Zhiyong Zheng Peixun Xiong Chun Huang Shengyang Huang Baohuai Zhao Yongan Wu Yi Zhang Bo‐Kyong Kim Xu Yu Ho Seok Park 

机构地区：[1]Institute of Engineering Technology,SINOPEC Catalyst Co.,Ltd,Beijing,China [2]Department of Chemistry,Sungkyunkwan University,Suwon,Republic of Korea [3]School of Chemical Engineering,Sungkyunkwan University,Suwon,Republic of Korea [4]Department of Materials,Imperial College London,London,UK [5]The Faraday Institution,Didcot,UK [6]Research Complex at Harwell,Rutherford Appleton Laboratory,Didcot,UK [7]Smart Electrical&Signaling Division,Korea Railroad Research Institute,Uiwangsi,Republic of Korea [8]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou,China

出　　处：《Electron》2024年第4期1-9,共9页电子(英文)

基　　金：National Research Foundation of Korea,Grant/Award Number:RS‐2024‐00453815;SKKU Global Research Platform Research Fund。

摘　　要：The large‐scale industrialization of lithium metal(Li),as a potential anode for a high energy density energy storage system,has been hindered by dendrite growth.The construction of an artificial solid electrolyte interphase layer featuring high ionic and low electronic conductivity has been verified to be a high‐performance strategy to confine the dendrite growth and promote the Li anode stability.Therefore,a functional organic protective layer is homogeneously deposited on the Li anode surface via an in situ chemical reaction between tetracyanoquinodi-methane(TCNQ)and Li.The as‐synthesized Li_(n)‐TCNQ organic film could efficiently trap non‐uniform Li deposition and restrain dendrite propa-gation.Particularly,an asymmetric M‐TCNQ‐Li|Cu cell with the Li_(n)‐TCNQ layer breezed through a high Coulombic efficiency of 91.15%after 100 cycles at 1.0 mA cm^(-2).The M‐TCNQ‐Li|NCM622 cell delivered a high capacity of 143.40 mAh g^(-1) at 0.2 C and maintained a good cyclic stability of 110.44 mAh g^(-1) after 160 cycles.The analysis results of spectroscopic tests further demonstrate that the Li_(n)‐TCNQ with the enhanced absorp-tion energy is conducive to lithiophilicity and decreases the overpotential of Li deposition.

关 键 词：artificial layer DENDRITE lithiophilicity lithium metal organic protective layer 

分 类 号：O62[理学—有机化学]