NiS2 nanoparticles anchored on open carbon nanohelmets as an advanced anode for lithium-ion batteries
| Autor: | D. D. Yang, Q.C. Jiang, Yu Zhang, R. D. Zhang, Chun Cheng Yang, Zhao Mingzhi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Engineering chemistry.chemical_element Nanoparticle Bioengineering 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Anode Amorphous solid chemistry Chemical engineering Electrode General Materials Science Lithium 0210 nano-technology Hybrid material Carbon |
| Zdroj: | Nanoscale Advances. 2:512-519 |
| ISSN: | 2516-0230 |
| Popis: | Low intrinsic conductivity and large volume expansion seriously restrict the efficient lithium storage performance of metal sulfides. Here, we fabricate a hybrid material of NiS2 nanoparticles/carbon nanohelmets (NiS2/CNHs) to address the above issues. As an anode material in lithium-ion batteries, NiS2/CNHs exhibit excellent cycling stability (490 mA h g−1 after 3000 cycles at 5 A g−1) and rate properties (412 mA h g−1 at 10 A g−1), outperforming other NiSx-based anode materials. These remarkable performances originate from the three-dimensional helmet-like integrated architecture of NiS2/CNHs, which reduces the electrode resistance due to the tight combination between NiS2 and CNHs, provides efficient diffusion paths for the electrolyte and Li+ owing to the amorphous nanoporous carbon structure, and significantly mitigates the aggregation and buffers the large volumetric expansion of NiS2 nanoparticles upon long-term cycling thanks to the open three-dimensional architecture and well-dispersed NiS2 nanoparticles on it. |
| Databáze: | OpenAIRE |
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