The preparation of whole sp-C composed alkyne rich carbon materials  

作　　者：Deyi Zhang Ze Yang Wenjing Liu Xingru Yan Qin Liu Xiaodong Li Changshui Huang Yuliang Li 

机构地区：[1]Beijing National Laboratory for Molecular Sciences,Organic Solids Laboratory,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,China [2]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China

出　　处：《Nano Research》2023年第11期12618-12625,共8页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2022YFA1204500 and 2022YFA1204501);the ICCAS Institute Research Project。

摘　　要：For the high content of sp-hybridized carbon atoms,carbyne based materials can express superior conductivity and ultra-high theoretical capacity,which are key factors of high-performance anode.However,the poor stability of synthetic intermediates and unwanted side reactions lead to huge challenge to synthesis carbyne alternating carbon–carbon triple and single bonds.Here,we rationally designed a smart“Greedy Snake”strategy to synthesize the alkyne rich carbon materials named Si capped alkyne rich carbon(Si-Alkyne-C)which comprised of sp-hybridized carbon atoms.The as-prepared Si-Alkyne-C generated on the copper surface through a carbon–carbon coupling,in which Si can effectively protect the intermediates generated by the reaction.The C–Si bond can constantly generate copper-alkyne intermediates to couple with other terminal alkynes to continuously elongate like"Greedy Snake",forming a long alkyne chain structure.The as-prepared Si-Alkyne-C can be applied as anode electrodes,exhibited very high reversible capacity of up to 2776 mAh/g at a current density of 50 mA/g and an average capacity around 1202 mAh/g at a high current density of 5000 mA/g for 5000 cycles,which are the best results among the reported carbon materials and better than many other anode materials.These results not only provide a facile strategy to prepare carbyne based materials,but also open a broad avenue for the preparation of high-capacity anode materials.

关 键 词：alkyne rich carbon materials sp-hybridized carbon anode material energy storage lithium storage 

分 类 号：O61[理学—无机化学]