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Confinement of ZIF-67-derived N, Co-doped C@Si on a 2D MXene for enhanced lithium storage.

Jianbo XiongQing LiXiaojuan TanXue GuoKaihui LiQiaolin LuoYao ChenXiaolan TongBing NaMing Zhong
Published in: Dalton transactions (Cambridge, England : 2003) (2024)
A heterostructure composed of ZIF-67-derived nitrogen and cobalt-doped carbon enfolded silicon (C@Si) nanoparticles anchored on 2D MXene layers was constructed for boosting the performance of lithium-ion batteries (LIBs). The heterostructure anode demonstrated a high initial discharge capacity of 3021 mA h g -1 at 0.2 A g -1 , retaining outstanding cycling stability with a reversible capacity of 520 mA h g -1 at 2000 mA g -1 , and the coulombic efficiency remained above 97% after 500 cycles. The introduced Ti 3 C 2 nanosheets and the cobalt-doped carbon can not only contribute to the interfacial transfer of Li + and electrons but also buffer the volume expansion of Si.
Keyphrases
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