Graphene Modified Polyaniline-Hydrogel Based Stretchable Supercapacitor with High Capacitance and Excellent
Wen Chen1,2, Shunqiong Jiang1,2, Han Xiao1
1Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, CAS Engineering Laboratory for Graphene, Advanced Li-ion Battery Engineering Laboratory of Zhejiang Province, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Zhejiang, 315201, P. R. China.
Chemsuschem
|November 27, 2020
Summary
Highly conductive graphene enhances polyaniline (PANI) hydrogel electrodes for stretchable supercapacitors. This innovation improves conductivity and stability, enabling high capacitance and durability for advanced energy storage applications.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Conjugated polymers are key in hydrogel-based stretchable supercapacitors.
- Low conductivity and poor stability of these polymers limit their use.
- Graphene integration offers a solution to enhance electrode performance.
Purpose of the Study:
- To improve the conductivity and structural stability of hydrogel-based stretchable electrodes.
- To investigate the effect of graphene as a substrate for polyaniline (PANI).
- To evaluate the electrochemical performance of the novel stretchable electrode in supercapacitors.
Main Methods:
- Incorporating highly conductive graphene as a substrate to anchor polyaniline (PANI) in a hydrogel matrix.
- Fabricating hydrogel-based stretchable electrodes with and without graphene.
- Testing the electrochemical performance, including capacitance and stability under stretching, of the supercapacitors.
Main Results:
- The graphene-anchored PANI electrode exhibited a high capacitance of 500.13 mF/cm².
- The electrode maintained 100% capacitance after 10,000 charge-discharge cycles.
- Supercapacitors demonstrated 43% capacitance retention at 150% strain and excellent stability over 2000 stretching cycles.
Conclusions:
- Highly conductive graphene significantly enhances the performance of PANI-based stretchable electrodes.
- Graphene provides an effective conducting network and stabilizes PANI via π-π interactions.
- The developed electrodes show great potential for advanced stretchable energy storage devices.
