@article{oai:repo.qst.go.jp:00082769,
 author = {Wang, Chan and Kuan, Hu and Liu, Ying and Zhang, Ming-Rong and Wang, Zhiwei and Li, Zhou and Kuan, Hu and Zhang, Ming-Rong},
 issue = {8},
 journal = {Materials},
 month = {Apr},
 note = {All-solid-state supercapacitors have gained increasing attention as wearable energy storage
devices, partially due to their flexible, safe, and lightweight natures. However, their electrochemical
performances are largely hampered by the low flexibility and durability of current polyvinyl alcohol
(PVA) based electrolytes. Herein, a novel polyvinyl alcohol-polyethyleneimine (PVA-PEI) based,
conductive and elastic hydrogel was devised as an all-in-one electrolyte platform for wearable
supercapacitor (WSC). For proof-of-concept, we assembled all-solid-state supercapacitors based on
boron nitride nanosheets (BNNS) intercalated graphene electrodes and PVA-PEI based gel electrolyte.
Furthermore, by varying the electrolyte ions, we observed synergistic effects between the hydrogel
and the electrode materials when KOH was used as electrolyte ions, as the Graphene/BNNS@PVAPEI-
KOH WSCs exhibited a significantly improved areal capacitance of 0.35 F/cm2 and a smaller
ESR of 6.02 ohm/cm2. Moreover, due to the high flexibility and durability of the PVA-PEI hydrogel
electrolyte, the developed WSCs behave excellent flexibility and cycling stability under different
bending states and after 5000 cycles. Therefore, the conductive, yet elastic, PVA-PEI hydrogel
represents an attractive electrolyte platform for WSC, and the Graphene/BNNS@PVA-PEI-KOH
WSCs shows broad potentials in powering wearable electronic devices.},
 title = {Flexible Supercapacitors Based on Graphene/Boron Nitride Nanosheets Electrodes and PVA/PEI Gel Electrolytes},
 volume = {14},
 year = {2021}
}