Investigation of superior sodium storage and reversible Na2S conversion reactions in a porous NiS2@C composite using in operando X-ray diffraction
- Title
- Investigation of superior sodium storage and reversible Na2S conversion reactions in a porous NiS2@C composite using in operando X-ray diffraction
- Author
- 황장연
- Issue Date
- 2020-12
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v. 8, no. 46, page. 24401-24407
- Abstract
- Herein, a nickel disulfide-carbon (NiS2@C) composite with an advanced architecture is proposed as a high-performance anode material for SIBs. The NiS2@C composite is prepared via a one-pot hydrothermal method using Ni-based metal-organic frameworks as a single precursor following the sulfidation route. The highly conductive and porous nature of NiS2@C not only provides high electronic conductivity and a facile Na+-ion diffusion pathway but also decreases the stress/strain of the material during the conversion reaction process. Hence, despite very low carbon contents (similar to 8.5 wt%), the proposed composite material demonstrates high initial capacity (800 mA h g(-1)), excellent long-term cycling ability over 500 cycles, and fast charge-discharge capability even at a high current density of 5 A g(-1). For the first time, the reversible Na2S conversion reaction is investigated via in operando X-ray diffraction analysis.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2020/TA/D0TA09801Ahttps://repository.hanyang.ac.kr/handle/20.500.11754/172937
- ISSN
- 2050-7488; 2050-7496
- DOI
- 10.1039/d0ta09801a
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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