Guar gum as a novel binder for sulfur composite cathodes in rechargeable lithium batteries

Abstract

Due to their high theoretical energy densities, lithium sulfur (Li-S) batteries are currently some of the most extensively investigated electrochemical power sources. As a sustainable and environmentally friendly biopolymer, guar gum (GG) is chosen as a binder for use in Li-S batteries for the first time. The results show that GG is a promising binder for sulfur composite cathode materials, and exhibits excellent cycling performance and a favorable high rate capability.

Prospect of Sulfurized Pyrolyzed Poly(acrylonitrile) (S@pPAN) Cathode Materials for Rechargeable Lithium Batteries

“…This aqueous binder consists of amount of carboxy and hydroxy groups, which enables its tight adhesion to cathode surface and accommodate volume change. The natural biopolymer guar gum (GG) was shown to be a promising binder for the S@pPAN composite (Figure b) . GG binder was speculated to boost Li + transport on the cathode surface.…”

“…b) Function mechanism of guar gum (GG) on S@pPAN surfaces and its cyclic performance. Reproduced with permission . Copyright Year 2016, Royal Society of Chemistry.…”

Prospect of Sulfurized Pyrolyzed Poly(acrylonitrile) (S@pPAN) Cathode Materials for Rechargeable Lithium Batteries

“…[55] This aqueous binder consists of amount of carboxy and hydroxy groups,w hich enables its tight adhesion to cathode surface and accommodate volume change.T he natural biopolymer guar gum (GG) was shown to be ap romising binder for the S@pPAN composite (Figure 5b). [56] GG binder was speculated to boost Li + transport on the cathode surface.Recently, Sun et al proposed aqueous poly(acrylic acid) (PAA) as ab inder for S@pPAN composites and it exhibited improved performance (Figure 5c). [57] Aqueous binders generally contain great amounts of hydroxy functional groups and carboxy functional groups,w hich might take part in interfacial reactions and forms an ovel CEI for S@pPAN during the initial cycles.G enerally,a queous binders have lower interfacial resistance and better electrochemical performance.A well-prepared binder is considered to be asacrificial agent to block the contact between the S@pPAN composite and electrolyte.…”

“…[55] CopyrightY ear 2013, Wiley-VCH.b)Function mechanism of guar gum (GG) on S@pPAN surfaces and its cyclic performance.R eproducedw ith permission. [56]…”

Multifunctional Chitosan–rGO Network Binder for Enhancing the Cycle Stability of Li–S Batteries

“…Bio‐based polymers have attracted enormous attention, due to their natural abundance, environmental friendliness, robust mechanical properties, and rich functional groups, in comparison to the conventional synthetic polymer binder . Bio‐based polymer binders, such as guar gum, gum arabic, xanthan gum, alginate, β‐cyclodextrin, and carboxymethylcellulose binders, have been introduced, and exhibit remarkable battery performance.…”