Stretchable aqueous-based Zn-ion batteries have shown promise as a sustainable and safe energy storage system for wearable electronics used in healthcare, sports, soft robotics, and prosthetics. A battery consists of the active electrode, electrolyte, current collector, and encapsulation. In this work, we focus on the development of the electrolyte component, which is a hydrogel based on polymers. Natural polymers (e.g proteins, polysaccharides) are chosen over synthetic ones because they are biodegradable, abundant in nature, and environmentally sustainable. Here, a hydrogel based on gelatin (G) and kappa-carrageenan (kC) were prepared and evaluated. We observed that the addition of kC into the hydrogel composite improved its mechanical properties. Optimum conditions at weight ratios of G:kC -99:1 wt%, the hydrogel showed good mechanical strength with an elongation at break of 370 ± 28%, elastic modulus of 0.119 ± 0.0256 MPa, and reversibility during 100 cyclic stretching at 50% strain. The hydrogel had a reasonable ionic conductivity of 14.80 mS/cm and was successfully integrated into a battery with a capacity of 0.24 mA/cm2. / <p>Examensarbetet är utfört vid Institutionen för teknik och naturvetenskap (ITN) vid Tekniska fakulteten, Linköpings universitet</p>
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:liu-196527 |
| Date | January 2023 |
| Creators | Byström, Lovisa |
| Publisher | Linköpings universitet, Laboratoriet för organisk elektronik, Linköpings universitet, Tekniska fakulteten |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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