(162s) Bioinspired Hydrogels for Development of Implantable Energy Storage Devices
AIChE Annual Meeting
2020
2020 Virtual AIChE Annual Meeting
Materials Engineering and Sciences Division
Poster Session: Materials Engineering & Sciences (08B - Biomaterials)
Thursday, November 19, 2020 - 8:00am to 9:00am
Polymers have been previously used as insulators and other structural materials. Still, when
combined with appropriate salts in the liquid state (ionic liquid), there is an increase in ionic
conductivity and other advantages over the conventional electrolytes. In this study, we
harness this increase in conductivity for the use of polymers as electrolytes in the energy
storage device. Biocompatible ionic liquid electrolyte is prepared by conjugating the
biopolymer such as Gelatin Methacrylol (GelMA), Polyethylene glycol di-acrylate (PEGDA)
and bio ionic liquid (BIL), choline acrylate for the fabrication of flexible electronics. An
increase of ionic liquid concentration exhibits a well-defined discharge voltage plateau of
~0.5–0.8V with a conductivity of 8.5×10-4 –3.5×10-3 S/m in both the polymers. The
biopolymer- ionic liquid electrolyte was also tested as an electrochemical capacitor based on
graphene synthesized as an electroactive material, exhibits a specific capacitance of 42 – 325
F/g at a current density of 1 A/g in a three-electrode system. Also, the polymer ionic liquid
electrolyte has a compression modulus of 85 KPa and a tensile modulus of 115 KPa, at the
highest percentage concentration of ionic liquid (20% GelMA, 20% PEGDA with 20% IL)
which allows the device to be fabricated in a thin film manner with increased mechanical
flexibility. These mechanical properties enable the electrolyte to be 3D printed and assembled
in micro-scales. Implantable power sources built with biocompatible and biodegradable
materials are of growing interest for the future implantable medical device. The electrolyte
synthesized exhibits excellent electrochemical stability and biodegradability; in cases where
it is hard to access the implanted location such as intravascular applications, biodegradable
implants are favorable. The integration of an eco-friendly, biocompatible ionic liquid
electrolyte provides a new perspective on energy storage.
combined with appropriate salts in the liquid state (ionic liquid), there is an increase in ionic
conductivity and other advantages over the conventional electrolytes. In this study, we
harness this increase in conductivity for the use of polymers as electrolytes in the energy
storage device. Biocompatible ionic liquid electrolyte is prepared by conjugating the
biopolymer such as Gelatin Methacrylol (GelMA), Polyethylene glycol di-acrylate (PEGDA)
and bio ionic liquid (BIL), choline acrylate for the fabrication of flexible electronics. An
increase of ionic liquid concentration exhibits a well-defined discharge voltage plateau of
~0.5–0.8V with a conductivity of 8.5×10-4 –3.5×10-3 S/m in both the polymers. The
biopolymer- ionic liquid electrolyte was also tested as an electrochemical capacitor based on
graphene synthesized as an electroactive material, exhibits a specific capacitance of 42 – 325
F/g at a current density of 1 A/g in a three-electrode system. Also, the polymer ionic liquid
electrolyte has a compression modulus of 85 KPa and a tensile modulus of 115 KPa, at the
highest percentage concentration of ionic liquid (20% GelMA, 20% PEGDA with 20% IL)
which allows the device to be fabricated in a thin film manner with increased mechanical
flexibility. These mechanical properties enable the electrolyte to be 3D printed and assembled
in micro-scales. Implantable power sources built with biocompatible and biodegradable
materials are of growing interest for the future implantable medical device. The electrolyte
synthesized exhibits excellent electrochemical stability and biodegradability; in cases where
it is hard to access the implanted location such as intravascular applications, biodegradable
implants are favorable. The integration of an eco-friendly, biocompatible ionic liquid
electrolyte provides a new perspective on energy storage.