Related Experiment Video
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
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Rational Design of Cobalt-Based Prussian Blue Analogues via 3 d Transition Metals Incorporation for Superior Na-Ion
Zhongxin Jing1, Muhammad Mamoor1, Lingtong Kong1
1Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
Angewandte Chemie (International Ed. in English)
|January 31, 2025
Summary
Researchers developed new Prussian blue analogues for sodium-ion batteries (SIBs). Cobalt-vanadium-based analogues (CoV-PBAs) show superior performance, with moderate p-band centers enhancing sodium-ion diffusion and electrode stability for efficient SIBs.
Area of Science:
- Materials Science
- Electrochemistry
- Computational Chemistry
Background:
- Developing efficient and sustainable sodium-ion batteries (SIBs) requires understanding structure-performance relationships in electrode materials.
- Prussian blue analogues (PBAs) are promising candidates for SIB anodes, but their electrochemical properties need optimization.
Purpose of the Study:
- To design and synthesize novel Cobalt-M-based Prussian blue analogues (CoM-PBAs) as anodes for SIBs.
- To investigate the correlation between electronic structure (p-band and d-band centers) and electrochemical performance.
- To identify key descriptors for predicting and optimizing SIB anode materials.
Main Methods:
- Synthesis of seven CoM-PBAs using a low-energy co-precipitation method.
- Density Functional Theory (DFT) simulations to analyze electronic structures and Na+ intercalation.
- Experimental validation including electrochemical testing (capacity, cycling, rate capability) and in situ/ex situ characterization.
Main Results:
- A moderate p-band center of cyanide linkages favors Na+ intercalation and diffusion.
- The d-band center of metal cations correlates with electrode stability.
- CoV-PBAs exhibited excellent performance: 565 mAh/g capacity, 97.7% retention over 15,000 cycles, and 174.7 mAh/g at 30 A/g.
- V introduction improved redox reaction reversibility and kinetics via π-electron regulation.
Conclusions:
- The electronic structure descriptors (p-band and d-band centers) are critical for evaluating SIB anode performance and stability.
- CoV-PBAs represent a highly efficient anode material for SIBs.
- This approach offers a transformative strategy for designing next-generation SIB electrode materials.
Keywords:
3d transition metalscobalt-based Prussian blue analoguedescriptorsrational incorporationsodium-ion batteriesMore Related Videos
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