Synergistic Role of Electrolyte and Binder for Enhanced Electrochemical Storage for Sodium-Ion Battery

Abstract

Sodium-ion batteries are promising futuristic large-scale energy-storage devices because of the abundance and low cost of sodium. However, the development and commercialization of the sodium-ion battery solely depends on the use of high-capacity electrode materials. Among the various metal oxides, SnO 2 has a high theoretical specific capacity for sodium-ion battery. However, the enormous volume expansion and low electrical conductivity of SnO 2 hinder its capability to reach the predicted theoretical value. Although different nanostructured designs of electrode materials like SnO 2 nanocomposites have been studied, the effects of other cell components like electrolyte and binder on the specific capacity and cyclic stability are yet to be understood. In the present study, we have investigated the synergistic effect of electrolyte and binder on the performance enhancement of SnO 2 supported on the intertwined network structure of reduced graphene oxide partially open multiwalled carbon nanotube hybrid as anode in sodium-ion battery. Our result shows that sodium carboxyl methyl cellulose and ethylene carbonate/diethyl carbonate as the electrolyte solvent offers a high specific capacity of 688 mAh g –1 and a satisfactory cyclic stability for 500 cycles. This is about 56% enhancement in specific capacity compared to the use of poly(vinylidene fluoride) binder and propylene carbonate as the electrolyte solvent. The present study provides a better understanding of the synergistic role of electrolyte and binder for the development of metal-oxide-based electrode materials for the advancement of the commercialization of sodium-ion battery.

Enhancing the Electrochemical Performance of SbTe Bimetallic Anodes for High-Performance Sodium-Ion Batteries: Roles of the Binder and Carbon Support Matrix

“…The electrodes prepared with the PAA binder are comparatively less rough due to the thin SEI layers formed as a result of the conductive ionic films on the surface of active material formed by PAA binder. The thin SEI layer enhances ion transport into each electrode by reducing the charge-transfer resistance [39], which is in agreement with the impedance results obtained for the PAA-based electrodes. These observations explain the long cyclabilities and capacity retention capabilities of the PAA-based electrodes, which highlight the superior adhesion properties of the PAA binder that keeps the electrode intact and adheres the active material to the current collector.…”

“…The EIS spectra of the cells with the electrodes prepared with the PVDF binder and 5% FEC added to the electrolyte (Figure 9a–c) show huge increases in the sizes of the semicircles corresponding to the charge-transfer resistance (R ct ) after the 1st, 10th, and 20th cycles, with the semicircle diameters increasing with increasing numbers of cycles. This increase in R ct is ascribable to the isolation of active material as cracks are formed due to the volume changes associated with desodiation/sodiation [39]. The poor binding ability of PVDF leads to the collapse and cracking of the electrode during cycling, which leads to higher charge-transfer resistances (R CT ).…”

“…The PVDF-based electrodes also show surface fragments and aggregated spherical particles. Overall the surfaces of the PVDF-based electrodes appear to be rough when compared to those of the PAA-based electrodes, which is ascribable to the decomposition of the electrolyte during prolonged cycling [39]. The electrodes prepared with the PAA binder are comparatively less rough due to the thin SEI layers formed as a result of the conductive ionic films on the surface of active material formed by PAA binder.…”

Biomass derived hierarchically porous carbon inherent structure as an effective metal free cathode for Li‐O2/air battery

“…[1][2][3] The conventional secondary batteries, such as Li-ion, Ni-cadmium, lead-acid batteries, and capacitors are turning out to be hopeful power sources for electric vehicles to overcome these problems. [4][5][6][7][8][9][10][11][12][13][14] However, conventional Li-ion battery shows a less energy density, which is attributed to both the aqueous electrolyte and poor cell voltage of electrode materials. [15] At this stage, research focuses on the This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.…”

Spray-coated few-layer graphene as an aluminium battery cathode

“…In addition, it buffers large volume changes of the electrode matrix, which eventually prevents the structural collapse. 25,26 On the contrary, parent graphite (ake size $150 mm) is insoluble in water and quickly settles down once dispersed by means of stirring or sonication. For this reason, the electrodes of graphite were fabricated conventionally with NMP solvent and PVDF binder at 90 and 10 wt%, respectively.…”