Solid-State, Single-Anion-Conducting Networks for Flexible and Stable Supercapacitor Electrolytes

Chengtian Shen, Mohamad Kabbani, Christopher M. Evans

Research output: Contribution to journalArticlepeer-review


Supercapacitors are a complementary energy storage technology to batteries and will be important for next-generation applications such as wearable sensors, soft robotics, roll-up displays, and electric vehicles. Here, we report a flexible supercapacitor with an all solid-state, single-ion-conducting polymer network electrolyte. The electrodes are comprised of reduced graphene oxide held together with a neutral polymer network to stabilize the dispersion and lend flexibility to the overall supercapacitor. Due to the high thermal and electrochemical stability of the network polymerized ionic liquid electrolyte, the resulting device can be charged to high voltages (3 V) and operated at high temperatures (120 °C) with excellent cycling stability. A 300 F/g specific capacitance is achieved by charging the device at 0.57 A/g and 90 °C or at 1.8 A/g and 120 °C. Due to the flexible network, the device can bend up to 180° without a substantial change in capacitance. The electrode/electrolyte interface, network architecture, and single-ion-conducting nature of the electrolyte are shown to be critical for high capacitance through a series of control experiments with ionic liquid supercapacitors.

Original languageEnglish (US)
Pages (from-to)4168-4176
Number of pages9
JournalACS Applied Polymer Materials
Issue number8
StatePublished - Aug 13 2021


  • energy storage
  • flexible devices
  • ion transport
  • polymerized ionic liquids
  • solid-state electrolyte
  • supercapacitors

ASJC Scopus subject areas

  • Polymers and Plastics
  • Process Chemistry and Technology
  • Organic Chemistry


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