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High content pyridine nitrogen-doped carbon nanosheets derived from ZIF-L as anode materials of lithium-ion batteries with excellent capacity and rate performance.

Authors :
Zhang, Wanggang
Kang, Kai
Duan, Jianzheng
Li, Peihua
Zhang, Ruixin
Wang, Jian
Liu, Yiming
Source :
Journal of Alloys & Compounds. Jul2024, Vol. 992, pN.PAG-N.PAG. 1p.
Publication Year :
2024

Abstract

The precise control of nitrogen doping types in carbon materials is crucial for optimizing energy storage devices. In this study, we synthesize nitrogen-doped carbon nanosheets (NCS) using ZIF-L as a precursor. Comparatively, the two-dimensional crystal structure of ZIF-L provides several advantages over ZIF-8 as a precursor in terms of nitrogen doping efficiency, achieving a higher doping level (14.56 %) and an increased ratio of pyridinic nitrogen (53.60 %). Consequently, NCS display a greater capacity for pseudocapacitive lithium storage. Furthermore, by adjusting the carbonization temperature, we precisely tailor the graphite-nitrogen doping level of NCS within the range of 16.80–31.22 %. Remarkably, when employed as an anode material in lithium-ion batteries, NCS-800 demonstrates exceptional cycling stability, with a capacity retention of 1078 mAh g−1 after 500 cycles at a current density of 0.5 A g−1, as well as excellent rate capability (735 mAh g−1 at 5 A g−1). This study not only compares the impact of precursor crystal structure modifications on nitrogen doping and lithium storage performance but also introduces a novel synthesis methodology for highly nitrogen-doped carbon materials, offering new avenues for future research in this field. • Nitrogen-doped carbon nanosheets (NCS) with a high nitrogen content using 2D ZIF-L as a precursor were synthesized. • The N level of NCS (14.56%) was higher than that of NCP (9.66%) obtained from ZIF-8 and tailored by heating temperature. • NCS-800 exhibited a specific capacity for lithium storage of 1078 mAh g‐1 after 500 cycles at 0.5 A g‐1 current density. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09258388
Volume :
992
Database :
Academic Search Index
Journal :
Journal of Alloys & Compounds
Publication Type :
Academic Journal
Accession number :
177026918
Full Text :
https://doi.org/10.1016/j.jallcom.2024.174591