Silica Restricting the Sulfur Volatilization of Nickel Sulfide for High-Performance Lithium-Ion Batteries
Journal Article
·
· Advanced Energy Materials
- Wuhan Univ. of Technology (China); Argonne National Lab. (ANL), Argonne, IL (United States)
- Wuhan Univ. of Technology (China)
- Northern Illinois Univ., DeKalb, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Nickel sulfides are regarded as promising anode materials for advanced rechargeable lithium-ion batteries due to their high theoretical capacity. However, capacity fade arising from significant volume changes during operation greatly limits their practical applications. Herein, confined NiSx@C yolk-shell microboxes are constructed to address volume changes and confine the active material in the internal void space. Having benefited from the yolk-shell structure design, the prepared NiSx@C yolk-shell microboxes display excellent electrochemical performance in lithium-ion batteries. Particularly, it delivers impressive cycle stability (460 mAh g-1 after 2000 cycles at 1 A g-1) and superior rate performance (225 mAh g-1 at 20 A g-1). Furthermore, the lithium storage mechanism is ascertained with in situ synchrotron high-energy X-ray diffractions and in situ electrochemical impedance spectra. Finally, this unique confined yolk-shell structure may open up new strategies to create other advanced electrode materials for high performance electrochemical storage systems.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- International Science and Technology Cooperation Program of China; National Key R&D Program of China; National Natural Science Foundation of China (NNSFC); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1581002
- Alternate ID(s):
- OSTI ID: 1570393
OSTI ID: 23098860
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 43 Vol. 9; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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