Polymeric Complexes of Nickel with Salen-Type Ligands as Multifunctional Components of Lithium Ion Battery Cathodes

Polozhentseva, Yu. A.; Novozhilova, M. V.; Chepurnaya, I. A.; Карушев, М. П.

doi:10.1134/s1063785021010260

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…These techniques allow the preparation of three-dimensional cathode frameworks with an extended web-like EAECP matrix, maximized contact area and minimized contact resistance between the polymer and the embedded LiFePO 4 particles. Both current collector-supported [40,[84][85][86][87] and freestanding [88,89] LiFePO 4 /EAECP composites have been synthesized by these methods.…”

Section: Lifepo 4 /Eaecp Cathodes Prepared By Electrochemical Methodsmentioning

confidence: 99%

“…Later, Polozhentseva et al used the electrochemical co-deposition method to produce two-component composite cathodes containing C-LFP particles dispersed in a conducting metallopolymer matrix synthesized from nickel(II) complexes with Salen type ligands [87]. The monomeric complexes were electropolymerized by applying oxidative potential steps to the carbon-coated aluminum foil immersed in the monomer solution containing dispersed C-LFP particles.…”

Section: Lifepo 4 /Eaecp Cathodes Prepared By Electrochemical Methodsmentioning

confidence: 99%

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Electrochemically Active Polymer Components in Next-Generation LiFePO4 Cathodes: Can Small Things Make a Big Difference?

2022

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As a cathode material for lithium-ion batteries, lithium iron phosphate (LiFePO4, LFP) successfully transitioned from laboratory bench to commercial product but was outshone by high capacity/high voltage lithium metal oxide chemistries. Recent changes in the global economy combined with advances in the battery pack design brought industry attention back to LFP. However, well-recognized intrinsic drawbacks of LiFePO4 such as relatively low specific capacity and poor electronic and ionic conductivity have not yet been fully mitigated. Integration of electrochemically active electron-conducting polymers (EAECPs) into the cathode structure to replace conventional auxiliary electrode components has been proposed as an effective strategy for further performance improvement of LFP batteries. In this review, we show how various combinations of polymer properties/functions have been utilized in composite LiFePO4 electrodes containing EAECP components. We present recent advances in the cathode design, materials, and methods and highlight the impact of synthetic strategies for the cathode preparation on its electrochemical performance in lithium-ion cells. We discuss advantages and limitations of the proposed approaches as well as challenges of their adoption by the battery manufactures. We conclude with perspectives on future development in this area.

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Section: Lifepo 4 /Eaecp Cathodes Prepared By Electrochemical Methodsmentioning

confidence: 99%

Section: Lifepo 4 /Eaecp Cathodes Prepared By Electrochemical Methodsmentioning

confidence: 99%

Electrochemically Active Polymer Components in Next-Generation LiFePO4 Cathodes: Can Small Things Make a Big Difference?

2022

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“…The introduction of transition metal centers into the conjugated backbone could significantly expand the applications and functionality of such materials. Metal-containing polymers based on transition metal complexes with Salen-type Schiff base ligands are widely studied as promising materials for many different applications [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The properties of these materials largely depend on substituents in the ligand environment and the metal center, special attention has been given to polymeric nickel(II) complexes with Salen-type ligands.…”

Section: Introductionmentioning

confidence: 99%

Reversible Redox Processes in Polymer of Unmetalated Salen-Type Ligand: Combined Electrochemical in Situ Studies and Direct Comparison with Corresponding Nickel Metallopolymer

Polozhentseva

Novozhilova

Карушев

2022

IJMS

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Most non-metalized Salen-type ligands form passivation thin films on electrode surfaces upon electrochemical oxidation. In contrast, the H2(3-MeOSalen) forms electroactive polymer films similarly to the corresponding nickel complex. There are no details of electrochemistry, doping mechanism and charge transfer pathways in the polymers of pristine Salen-type ligands. We studied a previously uncharacterized electrochemically active polymer of a Salen-type ligand H2(3-MeOSalen) by a combination of cyclic voltammetry, in situ ultraviolet–visible (UV–VIS) spectroelectrochemistry, in situ electrochemical quartz crystal microbalance and Fourier Transform infrared spectroscopy (FTIR) spectroscopy. By directly comparing it with the polymer of a Salen-type nickel complex poly-Ni(3-MeOSalen) we elucidate the effect of the central metal atom on the structure and charge transport properties of the electrochemically doped polymer films. We have shown that the mechanism of charge transfer in the polymeric ligand poly-H2(3-MeOSalen) are markedly different from the corresponding polymeric nickel complex. Due to deviation from planarity of N2O2 sphere for the ligand H2(3-MeOSalen), the main pathway of electron transfer in the polymer film poly-H2(3-MeOSalen) is between π-stacked structures (the π-electronic systems of phenyl rings are packed face-to-face) and C-C bonded phenyl rings. The main way of electron transfer in the polymer film poly-Ni(3-MeOSalen) is along the polymer chain, while redox processes are ligand-based.

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Redox‐Active Metallopolymers

2023

An Introduction to Redox Polymers for Energy‐Storage Applications

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Polymeric Complexes of Nickel with Salen-Type Ligands as Multifunctional Components of Lithium Ion Battery Cathodes

Cited by 8 publications

References 14 publications

Electrochemically Active Polymer Components in Next-Generation LiFePO4 Cathodes: Can Small Things Make a Big Difference?

Electrochemically Active Polymer Components in Next-Generation LiFePO4 Cathodes: Can Small Things Make a Big Difference?

Reversible Redox Processes in Polymer of Unmetalated Salen-Type Ligand: Combined Electrochemical in Situ Studies and Direct Comparison with Corresponding Nickel Metallopolymer

Redox‐Active Metallopolymers

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