Enhanced Electrochemical Properties of LiFePO₄ Electrodes with Carboxylated Poly(vinyl difluoride) in Lithium-Ion Batteries: Experimental and Theoretical Analysis

Multiscale Morphological and Electrical Characterization of Charge Transport Limitations to the Power Performance of Positive Electrode Blends for Lithium‐Ion Batteries

“…As a matter of fact, the CB + PVdF mixture has about one‐third of its specific surface in contact with LFP for both electrodes (Figure f). This homogeneous intermixing of the components may be related to some attractive interactions between the CB and the carbon coated LFP particles in the electrode slurry, as well as between the PVdF chains and the carbonaceous surfaces, and to a repulsive interaction between PVdF and the oxygen rich NMC surface . The nanometric strands of CB + PVdF, are much better intraconnected through the network of LFP particles than in J, with values of 88% and 92% for F and H, respectively (Table ), because the CB + PVdF mixture is excluded from the volume occupied by NMC and is thus more concentrated in the LFP/CB + PVdF mixture than in J.…”

“…Indeed, the strands of CB + PVdF mixture and the pores (Figure 3c-f) exhibit a nanometric range of sizes. [49] The nanometric strands of CB + PVdF, are much better intraconnected through the network of LFP particles than in J, with values of 88% and 92% for F and H, respectively (Table 1), because the CB + PVdF mixture is excluded from the volume occupied by NMC and is thus more concentrated in the LFP/CB + PVdF mixture than in J. As a matter of fact, the CB + PVdF mixture has about one-third of its specific surface in contact with LFP for both electrodes (Figure 2f).…”

Electronic and Ionic Dynamics Coupled at Solid–Liquid Electrolyte Interfaces in Porous Nanocomposites of Carbon Black, Poly(vinylidene fluoride), and γ-Alumina

“…CB has a complex structure of primary particles (mean diameter 37 nm), forming chemically bound aggregates (average size 150 nm) that tend to further agglomerate, resulting in void volumes in the interstices of the CB agglomerates, as well as in the interstices between CB agglomerates and γ-Al 2 O 3 particles. PVdF preferentially bonds to CB and forms CB + PVdF clusters because it has weak interactions with alumina as a consequence of electrostatic repulsion between fluorine and oxygen atoms . The total porosity of the samples, which is determined from their mass composition, their dimensions and the density of each compound, increases from 46 to 58%.…”

A Facile and Very Effective Method to Enhance the Mechanical Strength and the Cyclability of Si‐Based Electrodes for Li‐Ion Batteries

“…Indeed, whenever the binder bears functional groups able to form strong covalent bond with the surface of the active particles and/or the current collector surface, then the cohesion and/or the adhesion of the electrode is significantly improved . Furthermore, the electrode cohesion and adhesion strengths generally increase with an increase of the binder content, or with an increase of the particle size, which illustrates the influence of the second parameter, Σ.…”

“…[21][22][23] Furthermore, the electrode cohesion and adhesion strengths generally increase with an increase of the binder content, [1,11] or with an increase of the particle size, [12,21] which illustrates the influence of the second parameter, Σ. Indeed, whenever the binder bears functional groups able to form strong covalent bond with the surface of the active particles and/or the current collector surface, then the cohesion and/ or the adhesion of the electrode is significantly improved.…”