期刊
MATERIALS TODAY ENERGY
卷 16, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2020.100395
关键词
3D nanocarbon; Nitrogen doping; Nanopore defects; Sodium-ion batteries; Lithium-ion batteries
资金
- National Natural Science Foundation of China [21975109]
- Science and Technology Project of Shenzhen [JCYJ20180305125106329, ZDSYS201707271014468]
- Shenzhen Peacock Plan [KQJSCX20180328094001794, 827-000273]
- Educational Commission of Guangdong Province [2016KCXTD006]
Carbon materials are among the most important materials used for anodes in rechargeable batteries due to their extensive resources and good cycling stability. However, the electrochemical performance of carbon-based anodes is closely related with their electronic states and morphologies/microstructures. Herein, we present a simple approach to synthesize a nitrogen-doped 3D nanocarbon (N-Carbon) with nanopore defects as high-capacity and stable anodes for sodium/lithium-ion batteries. This carbon material well inherits the unique nanosheet-like morphology of the template, which is composed of twisted-interconnected cuboidal hollow nanocages with a large number of nanopores across the shells. N-Carbon with integration of N heteroatom and 3D porous structure exhibits high reversible capacities of sodium-ion batteries, up to 401.9 and 311.7 mAh g(-1) at 0.1 and 0.5 A g(-1) after 100 cycles, respectively. This unique carbon material simultaneously exhibits excellent rate capability and cycling stability, with reversible capacities of 199.7 and 97.9 mAh g(-1) at large current densities of 1 and 5 A g(-1) even after 10,000 cycles, respectively. Moreover, N-Carbon also exhibits high capacity of 709 mAh g(-1) for lithium-ion batteries after 2500 cycles at 10 A g(-1). The excellent reversibility, rate capability, and cycling stability are attributed to this unique N-Carbon integrating into rich nitrogen-doped induced ion-storage sites and its relative ordered 3D pore structure. Published by Elsevier Ltd.
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