Poly(acrylic acid) locally enriched in slurry enhances the electrochemical performance of the SiO_x lithium-ion battery anode

Abstract

Silicon oxide (SiOx) is recognized as a promising anode material for high-energy lithium-ion batteries (LIBs) due to its abundant reserve, facile synthesis, and high theoretical capacity. However, the practical use...

Robust Electrochemical Performance of LIBs Using a Polymethylene-Based High-Density Carboxylic Acid Binder in Graphite Anodes

“…The presence of a high concentration of LiF in the SEI of PFA binder-based electrode shows to have a high shear modulus and low diffusion barrier of 0.17 eV to lithium-ion. It is also hard to dissolve even at high temperatures, porous to only lithium-ion, and resists further electrolyte attacks. , In the C 1s spectra, species such as C–C/C–H, C–O, CO, and Li 2 CO 3 were observed on all the different binder-based electrodes, which is attributed typically to the decomposition of organic solvent (Figure b). Compared to PFA and PAA binder-based electrodes, the PVDF binder-based electrode shows higher peak intensity for all the organic species (e.g., C–O, CO, and Li 2 CO 3 ) .…”

“…The presence of a high concentration of LiF in the SEI of PFA binder-based electrode shows to have a high shear modulus and low diffusion barrier of 0.17 eV to lithium-ion. It is also hard to dissolve even at high temperatures, porous to only lithium-ion, and resists further electrolyte attacks 8,78. In the C 1s spectra, species such as C−C/C−H, C−O, C�O, and Li 2 CO 3 were observed on all the different binder-based…”

Co-operation of hydrogen bonds and dynamic covalent bonds enables an energy-dissipative crosslinked binder for silicon-based anodes

“…It has been confirmed that engineering advanced polymer binders is an industrially efficient strategy for improving electrochemical performance and lengthening the cycle life of Si-based anodes, showing the unique advantages of a simple fabrication process and relatively lower cost. 10,11 Although binders act as an integral part with a small dosage, they can play a critical role in improving the cycling stability of Si anodes by bridging together the components in Si anodes and maintaining their mechanical properties and conductive integrity. 12 Polyvinylidene fluoride (PVDF) is a commonly used binder for LIBs that has the advantage of electrochemical stability.…”