Interpenetrated N-rich MOF derived vesicular N-doped carbon for high performance lithium ion battery

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 51; no. 2; pp. 7817 - 7827
• Main Authors: Zhao, Yun-Xiu, Sun, Yuan-Wei, Li, Jun, Wang, Su-Na, Li, Da-Cheng, Dou, Jian-Min, Zhong, Ming, Ma, Hui-Yan, Li, Yun-Wu, Xu, Li-Qiang
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 24.05.2022
• Subjects: Anodes; Carbon; Crystal structure; Electrode materials; Electronic devices; Electronic structure; Lithium; Lithium-ion batteries; Metal-organic frameworks; Porous materials; Pyrolysis; Rechargeable batteries; Storage capacity
• ISSN: 1477-9226; 1477-9234; 1477-9234
• DOI: 10.1039/d2dt00551d

High-performance lithium ion batteries (LIBs) juggling high reversible capacity, excellent rate capability and ultralong cycle stability are urgently needed for all electronic devices. Here we report employing a vesicle-like porous N-doped carbon material (abbr. N/C-900) as a highly active anode for LIBs to balance high capacity, high rate and long life. The N/C-900 material was fabricated by pyrolysis of a designed crystal MOF LCU-104 , which exhibits a graceful two-fold interpenetrating structural feature of N-rich nanocages {Zn 6 (dttz) 4 } linked through an N-donor ligand bpp (H 3 dttz = 4,5-di(1 H -tetrazol-5-yl)-2 H -1,2,3-triazole, bpp = 1,3-bis(4-pyridyl)propane). The features of LCU-104 combine high N content (35.1%), interpenetration, and explosive characteristics, which endow the derived N/C material with optimized N-doping for tuning its chemical and electronic structure, a suitably thicker wall to enhance its stability, and a vesicle-like structure to improve its porosity. As an anode material for LIBs, N/C-900 delivers a highly reversible capacity of ca. 734 mA h g −1 at a large current density of 1 A g −1 until the 2000th cycle, revealing its ultralong cycle stability and excellent rate capability. The unique structure and preferential interaction between abundant pyridinic N active sites and Li atoms are responsible for the improved excellent lithium storage capacity and durability performances of the anode according to analysis of the results of computational modeling. MOF-derived vesicle-like N-doped carbon presents high reversible capacity, high rate capability and ultralong cycle life as LIB anode. Theoretical calculation verifies the experimental results.