A collagen-based electrolyte-locked separator enables capacitor to have high safety and ionic conductivity

Biopolymer Nanoscale Assemblies as Building Blocks for New Materials: A Review

“…[ 262 ] Cow hide also can be applied as an separator in 1 m Na 2 SO 4 solution after cross‐linking with oxidized sodium alginate, resulting in flexibility and relatively lower loss of capacitance ( Figure A–D). [ 263 ] Chrome tanned split‐leather achieved effective separation for a variety of viscous emulsions (≈77.3–200.0 mPa·s), comparable to commercial single‐sided polytetrafluoroethylene and single‐sided polyvinylidene fluoride sieving membranes (Figure 22E–J). [ 264 ] The fibrous morphology, hierarchical structure, and surface‐reactivity of collagen fibers benefit these native collagen mesostructures as bio‐templates, supporting matrix, and immobilization carriers.…”

“…These sensors displayed multi‐dimensional recognition including compression and humidity responses with broad dynamic response ranges, potentially serving as wearable smart devices [ 256 ] (Figure 21E). Leather consists of natural collagen fibers, thus, a series of leather‐based materials was developed for flame retardancy, [ 262 ] energy storage, [ 263 ] emulsion separations [ 264 ] and X‐ray shielding materials. [ 265 ] Leather processing with cattle hide resulted in flame retardant modifiers for polymer materials.…”

“…Reproduced with permission. [ 263 ] Copyright 2020, Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. E–G) Proposed separation mechanism showing with emulsions separated by the leather‐based membrane, optical microscopy images of emulsion ME5 (viscosity 200 mPa·S) H) before and J) after vacuum filtration by the membrane I).…”

On the development of chrome-free tanning agents: an advanced Trojan horse strategy using ‘Al–Zr-oligosaccharides’ produced by the depolymerization and oxidation of biomass

“…Besides, the collagen nanofibers with an average diameter between 50 and 200 nm merge to form collagen microfibers of ca. 2-10 μm, fiber bundles, ranging from 20 to 100 μm, to finally compose a 3D fibrous network 30 . However, stacked collagen fibers with a low dispersion degree in the tanned leather cross-section are observed, which indicates an ineffective tanning effect of 'Al-Zr-oligosaccharides'.…”

Recent progress and challenges of carbon materials for Zn‐ion hybrid supercapacitors

“…The development of high‐performance energy storage devices (ESDs) is extremely crucial to counter the intermittent production and uneven geographical distribution of most energy resources (solar, wind energy, etc) 1‐6 . At present, a variety of ESDs have been exploited, such as Li‐ion batteries, 7,8 zinc‐ion (Zn‐ion) batteries, 9,10 conventional capacitors, 11,12 and supercapacitors 13‐15 . However, few of these possess a satisfactory energy density and power density at the same time.…”