Natively stretchable micro-supercapacitors based on a PEDOT:PSS hydrogel

Abstract

Highly stretchable (>200%) microsupercapacitors (with 93% retention of the capacitance) are prepared by a facile laser-patterning and injection method with a highly conductive PEDOT:PSS hydrogel.

Crystal Surface Engineering Induced Active Hexagonal Co2P‐V2O3 for Highly Stable Lithium–Sulfur Batteries

“…To demonstrate the merit of the H‐Co 2 P‐V 2 O 3 toward polysulfide transformation in depth, Li 2 S nucleation experiments are also performed. Based on Faraday's law, [ 28 ] the Li 2 S nucleation capacity of H‐Co 2 P‐V 2 O 3 /CP is 198.0 mAh g −1 , which is higher than that of Co 2 P‐V 2 O 3 (161.8 mAh g −1 ) and Co 2 P (113.3 mAh g −1 ), respectively (Figure 5c–e). Besides, the time of Li 2 S nucleation on the H‐Co 2 P‐V 2 O 3 is apparently the earliest, demonstrating that the H‐Co 2 P‐V 2 O 3 possesses outstanding electrocatalytic capability toward LiPSs and significantly accelerates the kinetics of Li 2 S redox.…”

Electrocatalyst Modulation toward Bidirectional Sulfur Redox in Li–S Batteries: From Strategic Probing to Mechanistic Understanding

“…i) Cycling performance at 0.2 C. (d–i) Reproduced with permission. [ 158 ] Copyright 2021, Wiley‐VCH.…”

“…integrated dual electrocatalytic active sites into a heterogeneous p–n junction with natural built‐in electric field to guide the directional transfer of Li 2 S 4 at the heterointerface, wherein p‐type Co 3 O 4 (p‐Co 3 O 4 ) and n‐type TiO 2 (n‐TiO 2 ) are prone to promote the transformation reaction of S 8 → Li 2 S 4 and Li 2 S 4 → Li 2 S, respectively. [ 158 ] Specifically, S 8 molecules are effectively anchored on mesoporous p‐Co 3 O 4 nanosheets at the initial stage of discharge process due to the strong chemisorption, therefore triggering and promoting the transformation of S 8 → Li 2 S 4 . On the ground of the sluggish reaction kinetics of subsequent liquid–solid conversion, the continuously accumulated Li 2 S 4 can be directed to the surface of n‐TiO 2 , thus enhancing further conversion reaction of Li 2 S 4 → Li 2 S with the aid of the built‐in electric field at the p–n junction interface (Figure 8d–f).…”

Application of conductive polymer hydrogels in flexible electronics

“…In addition, the electrochemical performance of MSCs can remain unchanged under different mechanical loads, such as bending and twisting, which confirms that CPHs are expected to become promising candidates for electrode materials for MSCs in the future. Furthermore, Li et al 203 proposed a new method to design naturally stretchable MSCs that are capable of maintaining high electrochemical performance at 200% stretching (Figure 8B). The MSC utilizing a PEDOT:PSS/LiTFSI‐PVA hydrogel as electrode materials have a specific capacitance of 44.5 mF cm −2 and exhibit excellent stretchability at 200% while retaining 93% of the original capacitance.…”