Poly(methyl methacrylate) Grafted Natural Rubber Binder for Anodes in Lithium-Ion Battery Applications

Abstract

Binders are one of the crucial components in batteries that provide adhesion for active materials and substrates. However, binders have always been the least studied materials compared with cathodes, anodes, and electrolytes. Here, a semicrystalline poly(methyl methacrylate) grafted natural rubber (MG49) was independently used and studied as a standalone rubber-based binder for graphite-based anode in Li-ion batteries. A comprehensive investigation of physicochemical and electrochemical performances of these electrodes consisting of the MG49 binder was done. The X-ray diffraction analysis found that the MG49-based electrodes showed good crystalline peaks that belong to the graphite compared with PVDF-and SBR + CMC-based electrodes. Similarly, the surface morphology and topography results of MG49-based electrodes and blank SBR + CMC displayed a better distribution of graphite and Super P. This led to an enhanced diffusion coefficient for the optimum electrode and a low charge transfer resistance (R ct ) of 153.4 Ω, which is comparable to those of SBR + CMC (129.4 Ω) and PVDF (570.5 Ω). Equally, the MG49-based electrode possessed a good reversibility redox reaction and low polarization. The evaluation of battery performance showed good resilient cycling stability and capacity retention (84.7%), and their Coulombic efficiency was maintained at >98.5%, underlying the potential use of MG49 rubber as a binder in Li-ion battery applications.

Carbonization of Corn Leaf Waste for Na-Ion Storage Application Using Water-Soluble Carboxymethyl Cellulose Binder

“…It should also be mentioned that carboxymethyl cellulose (CMC) is a linear polymeric derivative of natural cellulose which contains hydroxyl (OH) and carboxymethyl (COOH) groups. Consequently, CMC is a water-soluble binder [58], avoiding the utilization of organic binders such as NMP. Therefore, CMC, with an annual production of 2 × 10 5 tons [59], can be considered as a more environmentally friendly and costeffective [60] option to be used as a binder of electrodes used in metal-ion batteries.…”

Biobased Acrylic Latexes/Sodium Carboxymethyl Cellulose Aqueous Binders for Lithium-Ion NMC 811 Cathodes

“…However, the CMC lacks flexibility and has poor adhesion to the current collector, resulting in brittle electrodes with cracks and delamination. To solve this issue, in the anodes, CMC is normally blended with styrene butadiene rubber (SBR), which thanks to its elastomeric properties provides high adhesion to the current collector and cohesion of the anode active layer for optimum electrode manufacturing and cycling lifetime under battery operating conditions. , Unfortunately, this is not the same scenario for high-voltage cathodes, since SBR latex oxidizes at high potentials limiting the battery cycling conditions . Therefore, other types of commercial latexes have been used in combination with CMC for the aqueous processing of cathodes such as a fluorine acrylic copolymer latex (TRD 202A) − and waterborne polyvinylidene fluoride (PVDF) or polytetrafluoroethylene (PTFE) latexes. − Although these latexes avoid the use of NMP and lessen the environmental effect, the presence of fluoride compounds also hinders the recycling and disposal of the battery once used .…”

Optimization of heating temperature on the growth of manganese sulfide nanosheets binder-free electrode for supercapattery

“…Thus, a hybrid supercapacitor known as supercapattery is innovated with a battery-grade and capacitive material are combined in a single device. The capacitive electrode stores charges through ion adsorption at the electrode electrolyte interface [4,5], whereas the battery grade electrode stores charges via faradic redox reactions [6,7] and it boasts high energy density. Supercapattery is anticipated to have the large storage capacity, quick charging/discharging rates, and prolonged cyclic stability for both amalgamating features of supercapacitors and batteries .…”