A universal cross-linking binding polymer composite for ultrahigh-loading Li-ion battery electrodes

Abstract

A general, facile-operability, and sustainable strategy to achieve ultrahigh-loading electrodes has been proposed that is simply replacing the traditional PVDF binder with an eco-friendly and robust c-PAA-XG binder with a high-efficiency damper.

Dual Cross-Linked Polymer Networks Derived from the Hyperbranched Poly(ethyleneimine) and Poly(acrylic acid) as Efficient Binders for Silicon Anodes in Lithium-Ion Batteries

“…In Table , we compared the cyclic test results of the cxPAA-PEI (3) anode with other previous research studies. − Among all cases listed in Table , the cross-linked polyacrylamide (cxPAM) exhibited the highest specific capacity of 2843 mAh g –1 at a low current rate of 0.1 C after 100 cycles. The result is impressive, but the preparation of cxPAM required varieties of chemicals, such as monomers, initiators, cross-linking agents and accelerators, and multistep synthesis procedures, which may limit the possibility of mass production.…”

“…7 Compared with the physical cross-linking H bonds, the chemical cross-linked covalent bonds are more efficient in preventing the silicon particles from volume change. In this aspect, chemical cross-linked systems, including PAA/poly-(vinyl alcohol) (PVA), 18 PAA/sodium Alg, 19 PAA/sodium CMC, 20 cross-linked polyacrylamide, 21 CMC/sodium borate, 22 cross-linked poly(ethyleneimine) (cxPEI), 23 PAA/ glycerin, 24 PAA/borax, 25 sodium CMC/maleic anhydride, 26 PAA/xanthan gum (XG), 27 cross-linked sodium alginate/ nickel chloride, 28 cross-linked dextrin/glutaraldehyde (DG5), 29 cross-linked corn starch, 30 NaCMC/oxidized starch. 31 etc., have been applied as effective binders to closely combine with anode components to derive silicon anodes with excellent electrochemical properties.…”

A Physically Cross-Linked Hydrogen-Bonded Polymeric Composite Binder for High-Performance Silicon Anodes

“…Polyvinylidene fluoride (PVDF) is widely employed in graphite anodes, yet its poor adhesion and mechanical strength do not match the design criteria for Si anodes. ,, Within the past decade, many natural and synthetic polymers have been investigated as the binders for Si anodes, ,− among which poly­(acrylic acid) (PAA) and its derivatives significantly improved the electrode stability and the battery performance. Linear PAA is a low-cost and water-soluble polymer, in which the carboxylic acid groups lead to strong interactions between the Si particles and copper current collector via hydrogen bonding .…”

Fabrication and Elastic Properties of TiO2 Nanohelix Arrays through a Pressure-Induced Hydrothermal Method

“…1,2 Owing to their special asymmetric coiled structure with excellent elasticity and flexibility, 3−5 nanoscale helical structures show promising applications in microwave radiation detection, 6 nanosprings, 7 nanogenerators, 8 and secondary batteries. 9,10 Therefore, it is of great significance to simply and accurately synthesize helical nanomaterials. Up to now, nanohelices have mainly been synthesized via selfassembly of nanoparticles, 11 strain-induced self-scrolling, 12,13 oblique angle deposition, 9,14 chiral molecule templates, 15−17 3D microprinting, 18 etc.…”

“…Helices are widespread in nature such as vines, conchs, bacteria, and horns and are associated with the physical, chemical, and biological properties of the environment and living organisms. , Owing to their special asymmetric coiled structure with excellent elasticity and flexibility, − nanoscale helical structures show promising applications in microwave radiation detection, nanosprings, nanogenerators, and secondary batteries. , Therefore, it is of great significance to simply and accurately synthesize helical nanomaterials. Up to now, nanohelices have mainly been synthesized via self-assembly of nanoparticles, strain-induced self-scrolling, , oblique angle deposition, , chiral molecule templates, − 3D microprinting, etc . − For instance, ultralong Au nanohelices were synthesized through asymmetric growth of nuclei embedded in floccules of ligand–Au complexes with 4-mercaptobenzoic acid as the ligand .…”