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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
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Spatially confined transition metals boost high initial coulombic efficiency in alloy anodes
Haoyu Fu1, Fangchao Gu1, Yize Niu1
1College of Physics, Weihai Innovation Research Institute, College of Materials Science and Engineering, Qingdao University Qingdao 266071 China wangxiaoshan1@qdu.edu.cn liqiang@qdu.edu.cn.
Chemical Science
|December 4, 2024
Summary
This study introduces NiO/SnO2 multilayers for advanced lithium-ion battery anodes, significantly boosting initial coulombic efficiency (ICE) and capacity. These materials enhance lithium storage in various ion batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Alloy-type materials offer high energy density for lithium-ion batteries but suffer from poor initial coulombic efficiency (ICE) due to conversion reaction irreversibility and volume expansion.
- Developing stable and efficient anodes is crucial for next-generation energy storage solutions.
Purpose of the Study:
- To design and investigate NiO/SnO2 multilayers as high-performance anodes for lithium-ion batteries.
- To enhance the initial coulombic efficiency (ICE) and long-term cycling stability of alloy-type battery anodes.
Main Methods:
- Fabrication of NiO/SnO2 multilayers with a hybrid interface.
- Utilizing density functional theory (DFT) calculations to understand reaction mechanisms.
- Employing operando magnetometry to study material behavior during battery operation.
- Electrochemical testing for lithium-ion, sodium-ion, and potassium-ion batteries.
Main Results:
- NiO/SnO2 multilayers generated confined Ni nanoparticles, catalyzing Li2O decomposition and preventing particle coarsening.
- Spatially confined Ni active sites lowered the energy barrier for Li-O bond rupture and improved Li+ migration kinetics.
- Achieved an impressive ICE of 92.3% and a capacity of 1247 mA h g-1 with 97% retention after 800 cycles.
- Demonstrated excellent performance in Na/K-ion batteries and improved lithium storage with SiO2-based materials.
Conclusions:
- The NiO/SnO2 multilayer design effectively addresses the limitations of alloy-type anodes, improving ICE and electrochemical performance.
- Confined Ni active sites play a critical role in enhancing reaction kinetics and material stability.
- This approach offers a promising strategy for developing advanced anodes for various ion batteries.
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