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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Published on: November 11, 2013

Enhancing P2/O3 Biphasic Cathode Performance for Sodium-Ion Batteries: A Metaheuristic Approach to Multi-Element

Anil K Paidi¹, Woon Bae Park², Vinod K Paidi³

¹PLS-II Beamline Department, Pohang Accelerator Laboratory, POSTECH, Pohang, 37673, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|June 11, 2024

Summary

This summary is machine-generated.

This study optimized sodium-ion battery cathodes using a meta-heuristic algorithm, enhancing stability and capacity. The new D-NFMO material shows excellent performance for future energy storage.

Keywords:

OP4 phase P2/O3 phase Z phase biphasic in situ X‐ray diffraction layered oxide phase transformation sodium‐ion batteries sustainable cathode

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Area of Science:

Materials Science
Electrochemistry
Computational Chemistry

Background:

Sodium-ion batteries (SIBs) are a promising alternative to lithium-ion batteries due to sodium's abundance.
P2/O3 biphasic cathodes in SIBs offer high energy but need improved stability.
Conventional methods for optimizing electrode materials are often slow and inefficient.

Purpose of the Study:

To develop a systematic methodology for optimizing multi-element doping in SIB cathode materials.
To enhance the electrochemical performance, particularly capacity and cyclic stability, of P2/O3 biphasic cathodes.
To overcome limitations of trial-and-error approaches in materials discovery for energy storage.

Main Methods:

Utilized the meta-heuristically assisted NSGA-II algorithm for multi-element doping optimization.
Synthesized and characterized the designed cathode material: Na$_{0.76}$Ni$_{0.20}$Mn$_{0.42}$Fe$_{0.30}$Mg$_{0.04}$Ti$_{0.015}$Zr$_{0.025}$O$_{2}$ (D-NFMO).
Employed multiple characterization techniques to investigate structural composition and stabilizing mechanisms.

Main Results:

The optimized D-NFMO cathode achieved a high initial reversible capacity of 175.5 mAh g$^{-1}$.
Demonstrated exceptional long-term cyclic stability in sodium cells.
Significantly suppressed the irreversible P2→OP4 phase transition, crucial for enhanced cycling stability.

Conclusions:

The meta-heuristic approach effectively optimizes multi-element doped cathode materials for SIBs.
D-NFMO exhibits superior electrochemical stability compared to pristine materials, showing potential as a high-voltage cathode.
This work paves the way for advanced SIB technology using abundant earth elements.