Lithiated Graphdiyne Quantum Dots for Stable Lithium Metal Anodes  

作　　者：Han Shen Congying Song Fan Wang Guoxing Li Yuliang Li 

机构地区：[1]Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion,Science Center for Material Creation and Energy Conversion,Institute of Frontier and Interdisciplinary Science,Shandong University,Qingdao 266237 [2]Key Laboratory of Organic Solids,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190 [3]University of Chinese Academy of Sciences,Beijing 100049

出　　处：《CCS Chemistry》2024年第5期1300-1311,共12页中国化学会会刊（英文）

基　　金：supported by the National Key Research and Development Project of China(grant nos.2022YFA1204500 and 2022YFA1204503);the National Natural Science Foundation of China(grant nos.52072222 and 22279073);the Natural Science Foundation of Shandong Province(grant no.ZR2022ZD35);the Taishan Scholar Project of Shandong Province of China(grant no.62460082061017).

摘　　要：Here,a facile strategy is proposed for the preparation of lithiated graphdiyne quantum dots(GDY-Li QDs)with conjugated sp-and sp2-hybridized carbons by the self-assembly technique ofπ–πstacking of lithiated hexaethynylbezene under mild conditions.The as-prepared GDY-Li QDs,containing stacked multialkynyl aromatic backbone and abundant lithium(Li),show an average diameter of about 2.6 nm and good dispersion in the solvents.These distinctive structures endow GDY-Li QDs with superior properties that cannot be matched by traditional QDs,such as strong ion adsorption,Li-ion self-concentration,high Li-ion conductivity,the nanoconfinement effect,and ion solvation regulation.Benefiting from these features,GDY-Li QDs can stabilize Limetal anodes to effectively suppress Li-dendrite growth and significantly improve its Li plating/stripping coulombic efficiency(99.3%in the carbonate electrolyte).The full cells with GDY-Li QDs protected Li-metal anodes,and LiNi_(0.8)Co_(0.1)Mn^(0.1)O_(2)cathodes delivered high capacity and excellent cycling stability at high rates,which demonstrates the great potential of GDY-Li QDs for application in fast-charging Li-metal batteries.

关 键 词：graphdiyne quantum dots LITHIATION lithium metal anodes ion distribution 

分 类 号：O64[理学—物理化学]