Compositional Effects on Structure and Transport Properties in a Polyelectrolyte Gel

The enhancement of lithium ion dissociation in polyelectrolyte gels on the addition of ceramic nano-fillers

“…The data suggests that both fillers preferentially interact with the sulfonate group; thus increasing the number of available charge carriers. Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples.…”

“…Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples. The SEM micrographs show that at the ideal filler concentration both the TiO 2 and SiO 2 are relatively homogeneously dispersed throughout the sample.…”

The enhancement of lithium ion dissociation in polyelectrolyte gels on the addition of ceramic nano-fillers

“…The data suggests that both fillers preferentially interact with the sulfonate group; thus increasing the number of available charge carriers. Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples.…”

“…Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples. The SEM micrographs show that at the ideal filler concentration both the TiO 2 and SiO 2 are relatively homogeneously dispersed throughout the sample.…”

Cellulose‐Based Nanomaterials for Energy Applications

“…Other cellulose derivatives have been used as well, with similar motivations of solvation and complexation of lithium ions to improve the ionic conductivity . Grafting anionic side chains to the polymer backbones is another way of improving the ionic conductivity as the translational mobility of negative charges can be reduced so that positive lithium ions can have a significant mobility . Paracha et al grafted lithium salts of 2‐acrylamido‐2‐methylpropane sulfonic acid on ethyl cellulose, and then copolymerized methyl methacrylate (MMA) with a crosslinking agent to form a semi‐interpenetrating network for LIB electrolyte .…”

Gel electrolytes based on lithium modified silica nano-particles

“…A mixture of solvents (DMA and EC) has often been used in gel electrolytes, and has been shown to be useful in lithium cycling experiments [14][15][16][17]. Binary solvent mixtures are used in preference to a single solvent due to their improved properties, especially increasing the effective dielectric constant while maintaining a low viscosity and lowering the freezing points of the gel electrolyte materials.…”

“…10b (both DMA and EC are more traditional battery compatible solvents [14][15][16][17]). The result is similar to the solution of Li-NTf 2 /DMA-EC with nominally the same lithium concentration.…”

The enhancement of lithium ion dissociation in polyelectrolyte gels on the addition of ceramic nano-fillers

“…The data suggests that both fillers preferentially interact with the sulfonate group; thus increasing the number of available charge carriers. Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples.…”

“…Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples. The SEM micrographs show that at the ideal filler concentration both the TiO 2 and SiO 2 are relatively homogeneously dispersed throughout the sample.…”

Cellulose‐Based Nanomaterials for Energy Applications

“…Other cellulose derivatives have been used as well, with similar motivations of solvation and complexation of lithium ions to improve the ionic conductivity . Grafting anionic side chains to the polymer backbones is another way of improving the ionic conductivity as the translational mobility of negative charges can be reduced so that positive lithium ions can have a significant mobility . Paracha et al grafted lithium salts of 2‐acrylamido‐2‐methylpropane sulfonic acid on ethyl cellulose, and then copolymerized methyl methacrylate (MMA) with a crosslinking agent to form a semi‐interpenetrating network for LIB electrolyte .…”

Gel electrolytes based on lithium modified silica nano-particles

“…A mixture of solvents (DMA and EC) has often been used in gel electrolytes, and has been shown to be useful in lithium cycling experiments [14][15][16][17]. Binary solvent mixtures are used in preference to a single solvent due to their improved properties, especially increasing the effective dielectric constant while maintaining a low viscosity and lowering the freezing points of the gel electrolyte materials.…”

“…10b (both DMA and EC are more traditional battery compatible solvents [14][15][16][17]). The result is similar to the solution of Li-NTf 2 /DMA-EC with nominally the same lithium concentration.…”

The enhancement of lithium ion dissociation in polyelectrolyte gels on the addition of ceramic nano-fillers

“…The data suggests that both fillers preferentially interact with the sulfonate group; thus increasing the number of available charge carriers. Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples.…”

“…Consequently, the 7 Li diffusion coefficient was enhanced with the addition of both TiO 2 and SiO 2 nano-particles. The SEM micrographs support this model and also show how the TiO 2 more readily combines with sulfonate groups when compared to the SiO 2 ; explaining the higher 7 Li diffusion coefficients and ionic conductivity values measured in the TiO 2 filled samples. The SEM micrographs show that at the ideal filler concentration both the TiO 2 and SiO 2 are relatively homogeneously dispersed throughout the sample.…”

Cellulose‐Based Nanomaterials for Energy Applications

“…Other cellulose derivatives have been used as well, with similar motivations of solvation and complexation of lithium ions to improve the ionic conductivity . Grafting anionic side chains to the polymer backbones is another way of improving the ionic conductivity as the translational mobility of negative charges can be reduced so that positive lithium ions can have a significant mobility . Paracha et al grafted lithium salts of 2‐acrylamido‐2‐methylpropane sulfonic acid on ethyl cellulose, and then copolymerized methyl methacrylate (MMA) with a crosslinking agent to form a semi‐interpenetrating network for LIB electrolyte .…”

Gel electrolytes based on lithium modified silica nano-particles

“…A mixture of solvents (DMA and EC) has often been used in gel electrolytes, and has been shown to be useful in lithium cycling experiments [14][15][16][17]. Binary solvent mixtures are used in preference to a single solvent due to their improved properties, especially increasing the effective dielectric constant while maintaining a low viscosity and lowering the freezing points of the gel electrolyte materials.…”

“…10b (both DMA and EC are more traditional battery compatible solvents [14][15][16][17]). The result is similar to the solution of Li-NTf 2 /DMA-EC with nominally the same lithium concentration.…”