An all-in-one supercapacitor with high stretchability via a facile strategy

Abstract

There are many studies about integrating supercapacitors to meet actual application needs, but challenges remain in assembling the device without a current collector and other additions.

Controlling the flake size of bifunctional 2D WSe2 nanosheets as flexible binders and supercapacitor materials

“…Flexible and freestanding electrodes have been widely applied in energy storage devices (especially supercapacitors) in a process dating back to several decades. [1][2][3] The electrochemical performance of energy storage devices is well known, and depends on the physical and electrochemical properties of the electrodes. In the traditional view of the electrodes, the main components are: (1) active materials ($80%), (2) conductive additives ($10%), and (3) polymer binders ($10%).…”

Conductive Hydrogel‐Based Electrodes and Electrolytes for Stretchable and Self‐Healable Supercapacitors

“…Therefore, achieving electrically and mechanically self‐healing properties in SCs is a sensible and efficient solution to the challenge. [ 192–195 ] By in situ integration of PANI into a PVH/H 2 SO 4 hydrogel film, in which PVH was the copolymer of hydroxypropyl acrylate and vinylimidazole, an all‐in‐one self‐healable SC was prepared. [ 192 ] The reversible dynamic intermolecular hydrogen bonding in PVH led to the excellent self‐healing behavior of the SC with ultra‐long cyclic life even after ten breaking and healing cycles.…”

“…Soon afterward, a freestanding, stretchable, and self‐healable all‐in‐one SC was built based on PA cross‐linked PANI/PVA hydrogel electrodes. [ 193 ] High mechanical stretchability and self‐healing capability was achieved simultaneously in the device due to the numerous cross‐linking sites and hydrogen bonds offered by PA. The tensile strength and the fracture elongation of the resultant device were 5.4 MPa and 714%, respectively.…”

Stretchable Supercapacitors: From Materials and Structures to Devices

“…All-in-one devices exhibit excellent properties, including freestanding ability, self-healing capacity, and high stretchability. [64] The helical fibrous stretchable supercapacitor prepared by Wang et al with a self-healing polymer (PU) as the shell retained 54.2% of its original capacitance after the third healing. [79] In addition, hydrogel polyelectrolytes enhanced by superstretched vinyl nanosilica exhibit good selfhealing properties through hydrogen bond cross-linking and can be employed to construct self-healing stretchable supercapacitors.…”

“…All‐in‐one devices exhibit excellent properties, including freestanding ability, self‐healing capacity, and high stretchability. [ 64 ] The helical fibrous stretchable supercapacitor prepared by Wang et al. with a self‐healing polymer (PU) as the shell retained 54.2% of its original capacitance after the third healing.…”