2D materials sandwich promises high energy density flexible supercaps: Page 2 of 2

July 04, 2017 //By Julien Happich
2D materials sandwich promises high energy density flexible supercaps
Using a simple and highly scalable fabrication technique, a team of Chinese researchers has combined the exceptional mechanical and electrical properties of Phosphorene and Graphene nanosheets to create a novel type of Micro SuperCapacitors (PG-MSC).

Multiple PG-MSCs were then connected in series and tested under flexure, exhibiting excellent flexibility and a very stable performance without capacitance fluctuation even under highly folded states. In their paper, the researchers attribute the excellent performance of their PG-MSCs to the complementary properties and synergistic combination of the 2D nanosheets together with the ionic liquid electrolyte.

A set of nine serially interconnected PG-MSCs.

"First, the 2D phosphorene and graphene nanosheets in PG films have a strong coupling effect for energy storage. The puckered phosphorene lamellae offer more ionic accommodation and fast transport pathway, and significantly prevent the restacking of graphene sheets, while high conductive capacitive graphene works as main mechanical skeleton and high-speed electron transport network, guaranteeing efficient utilization of phosphorene nanosheets for energy storage".

Three serial PG-MSCs used to power a
light-emitting diode.

"Second, the simplified device fabrication of PG-MSCs can efficiently avoid the oxidation of phosphorene and solvent contamination originating from multiple-step lithographic processing", they write.

The researchers concluded their paper by emphasizing the simplicity and scalability of the device's production process to create parallelly and serially interconnected modular power sources without the need for metal-based interconnects and contacts.

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