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

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 53; no. 27; pp. 11232 - 11236
• Main Authors: Xiong, Jianbo, Li, Qing, Tan, Xiaojuan, Guo, Xue, Li, Kaihui, Luo, Qiaolin, Chen, Yao, Tong, Xiaolan, Na, Bing, Zhong, Ming
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 09.07.2024
• Subjects: Carbon; Cobalt; Heterostructures; Lithium-ion batteries; MXenes; Rechargeable batteries; Silicon
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/d4dt01314j

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. N, Co-doped C@Si on a 2D MXene was constructed for boosting the performance of lithium-ion batteries (LIBs), which demonstrated ultrahigh reversible capacity, outstanding rate capability and excellent cycling performance in lithium-ion batteries.