The effect of polymeric binders in the sulfur cathode on the cycling performance for lithium–sulfur batteries

Abstract

We study the structural and electrochemical performance of sulfur cathodes prepared with two different binders, PVdF and SBR/CMC. Enhanced battery performance is observed in the SBR/CMC-based electrode and its origin is scrutinized.

Interface engineering toward stable lithium–sulfur batteries

“…[276][277][278] Especially, bio-derived binders are excellent options for the sulfur cathode because of their greater adhesion and absorption to lithium polysulfides. 279 Strong cohesiveness makes it possible to produce high sulfur-loading electrodes, while polar binders assist in decreasing the use of extra adsorbents. Furthermore, bio-derived binders also possess environmental friendliness, easy accessibility, and renewability, which endows them with the potential to be applied for industrialization.…”

Investigating the effect of the degree of cross‐linking in styrene butadiene rubber on the performance of graphite anodes for the use in lithium‐ion batteries

“…The SBR is present to add an element of flexibility to the system, as graphite anodes with only CMC as the binder system are known to be to brittle after vacuum drying. 10 However, often, when used within the battery industry, no consideration is given to the breakdown chemistry of the SBR component, and it is simply referred to as just "SBR". This is an important omission because properties of the SBR, including tensile strength and glass transition temperatures (T g ), are highly dependent on factors such as the ratio of styrene to butadiene units and the degree of crosslinking (DoCL).…”

“…The hydrophobic sections of CMC interact with graphite particles, while the hydrophilic sections interact with the water molecules. The SBR is present to add an element of flexibility to the system, as graphite anodes with only CMC as the binder system are known to be to brittle after vacuum drying 10 …”

Amphiphilic Bottlebrush Polymeric Binders for High‐Mass‐Loading Cathodes in Lithium‐Ion Batteries

“…This issue becomes more stringent for the development of high-mass-loading cathode sheets, which have garnered considerable attention as a facile and scalable way to construct high-energy-density Li-ion batteries. [5][6][7] Major challenges facing the high-massloading cathode sheets include nonuniform electron/ion conduction networks in their through-thickness direction, [8][9][10][11][12] insufficient adhesion (between electrode active layers and current collectors) under electrolyte-soaked states, [13][14][15] and dissolution of transition metal (TM) ions from cathode active materials. [8,16,17] Notably, these challenges are closely dependent on cathode binders.…”