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A Tissue-Like Soft All-Hydrogel Battery.

Tingting Ye1, Jiacheng Wang1, Yiding Jiao1

  • 1National Laboratory of Solid State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China.

Advanced Materials (Deerfield Beach, Fla.)
|October 29, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed the first ultrasoft, all-hydrogel batteries that perfectly match the mechanical properties of biological tissues. These biocompatible batteries offer a promising power source for advanced wearable and implantable electronics.

Keywords:
batteriesbiocompatible materialsflexible materialshydrogelssoft materials

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Area of Science:

  • Materials Science
  • Bioelectronics
  • Energy Storage

Background:

  • Wearable and implantable bioelectronics require power sources with mechanical properties that match dynamic biological tissues.
  • Existing batteries often have high Young's moduli, leading to poor integration and potential immune responses.
  • Developing tissue-like soft batteries is crucial for next-generation medical devices.

Purpose of the Study:

  • To create ultrasoft batteries with mechanical properties comparable to biological tissues.
  • To address the limitations of current batteries in accommodating biological movement and reducing immune reactions.
  • To enable the development of advanced power sources for bioelectronic applications.

Main Methods:

  • Fabrication of ultrasoft batteries entirely from hydrogel materials.
  • Characterization of battery mechanical properties, specifically Young's modulus.
  • Evaluation of electrochemical performance, including specific capacity and current density.
  • Assessment of stability and biocompatibility for wearable and implantable applications.

Main Results:

  • Developed the first ultrasoft batteries exclusively based on hydrogels.
  • Achieved Young's moduli of 80 kPa, matching the softness of skin and organs.
  • Demonstrated high specific capacities: 82 mAh g⁻¹ for lithium-ion and 370 mAh g⁻¹ for zinc-ion all-hydrogel batteries.
  • Confirmed high stability and biocompatibility in wearable and implantable device applications.

Conclusions:

  • Ultrasoft, all-hydrogel batteries offer a viable solution for powering bioelectronics.
  • These batteries exhibit excellent mechanical compatibility with biological tissues.
  • The developed technology paves the way for advanced, integrated wearable and implantable electronic systems.