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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.
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