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Related Concept Videos

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
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Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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Structural Isomerism02:34

Structural Isomerism

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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
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Resonance and Hybrid Structures02:16

Resonance and Hybrid Structures

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According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
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Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

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Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
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Heterogeneous Catalysis01:22

Heterogeneous Catalysis

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Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
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Synthesis and Characterization of Fe-doped Aluminosilicate Nanotubes with Enhanced Electron Conductive Properties
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Heterocations Synergistic Doping for Kinetically Enhanced and Structurally Stable LiMn0.6Fe0.4PO4.

Junjie Han1, Na Tian1, Siyun Wang2

  • 1School of Materials and New Energy, South China Normal University, Shanwei 516600, P. R. China.

ACS Applied Materials & Interfaces
|March 14, 2026
PubMed
Summary
This summary is machine-generated.

Dual-site doping with Sodium (Na+) and Cobalt (Co2+) enhances lithium manganese iron phosphate (LiMnxFe1-xPO4) cathode performance. This strategy improves conductivity and stability for advanced battery applications.

Keywords:
Jahn–Teller effectLiMn0.6Fe0.4PO4Na–Co dopingcathode materiallithium-ion batteriessynergistic enhancement

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • LiMnxFe1-xPO4 (LMFP) is a high-voltage cathode material for next-generation batteries.
  • Poor ionic and electronic conductivity limit LMFP's practical application.
  • Enhancing LMFP kinetics is crucial for improved energy density and cycle life.

Purpose of the Study:

  • To investigate the synergistic effects of Na+ and Co2+ dual-site doping on LMFP.
  • To improve the ionic and electronic conductivity of LMFP cathodes.
  • To enhance the electrochemical performance and structural stability of LMFP.

Main Methods:

  • Synthesis of Na+-Co2+ codoped LMFP materials.
  • Electrochemical characterization including cycling tests and rate capability.
  • Theoretical calculations (e.g., DFT) to understand doping mechanisms.

Main Results:

  • The Na+-Co2+ codoped LMFP cathode achieved a specific capacity of 135.8 mAh/g at 1 C.
  • Excellent cycling stability was observed, with 92.5% retention after 200 cycles and 90.2% at 0 °C after 300 cycles.
  • Doping expanded Li+ diffusion channels and improved electronic conductivity, lowering the diffusion barrier.

Conclusions:

  • Na+-Co2+ dual-site doping effectively enhances the electrochemical performance of LMFP.
  • The strategy significantly improves ionic and electronic conductivity and structural stability.
  • This approach offers a promising pathway for developing high-performance LMFP cathodes for advanced batteries.