Abstract Elastomers are essential for emerging stretchable electronics, which has become more and more important to bio-integrated devices. To ensure a high compliance to application environment, elastomers are expected to resist and even self-repair the mechanical damages, be friendly to human body. Herein, inspired by peptidoglycan, we designed the first room-temperature autonomous self-healing biodegradable and biocompatible elastomers, poly(sebacoyl 1,6-hexamethylenedicarbamate diglyceride) (PSeHCD) elastomers. The unique structure including alternating ester-urethane moieties and bionic hybrid crosslinking endowed PSeHCD elastomers superior properties: ultrafast self-healing, tunable biomimetic mechanical properties, facile reprocessability, as well as good biocompatibility and biodegradability. The potential of PSeHCD elastomers was demonstrated by super-fast self-healing stretchable conductor (21 s) and motion sensor (2 min). This work provides new design and synthetic principle of elastomers for the applications in bio-integrated electronics.

A simple one-pot method is achieved for preparation of FeNi2S4–CNT–graphene nanocomposites, which displays a robust connection among ternary components.

No abstract

A ternary Ni 1+x Fe 2Àx S 4 -graphene-2D-MoSe 2 (Ni 1+x Fe 2Àx S 4 -g-MoSe 2 ) nanocomposite was designed and fabricated through a facile two-step method. Well-dispersed Ni 1+x Fe 2Àx S 4 nanoparticles on graphene sheets were achieved using a hydrothermal method followed by coating with MoSe 2 nanosheets using in situ adsorption. The synergistic effect of the three components present in Ni 1+x Fe 2Àx S 4 -g-MoSe 2 yielded enhanced electrochemical properties in terms of high specific capacitance reaching up to 2108 F g À1 at a current density of 1 A g À1, with capacity retention of 93.3% after 4000 cycles at the high chargedischarge current density of 5 A g À1. These outstanding capacitance features were mainly attributed to the unique Ni 1+x Fe 2Àx S 4 -g-MoSe 2 nanostructure, allowing easy access to the pseudocapacitive species and fast ion/electron transfer. Overall, the prepared 3D nanocomposite is promising as an electrode material for advanced supercapacitors.

Metal oxide-carbon composites (MOCCs) derived from sodium alginate gels were prepared through a facile and green ionic gelation method. Various polyvalent cations (Mn[Formula: see text], Fe[Formula: see text], and Zn[Formula: see text] were used to crosslink sodium alginate to produce gels, following which the gels were carbonized under nitrogen flow to yield MOCCs. X-ray diffraction, scanning electron microscopy, and Raman spectra can character the as-prepared materials’ structural and morphological characters and thermogravimetric analysis. The electrochemical behavior of the as-prepared materials was studied by applying to cyclic voltammetry, galvanostatic charge–discharge measurements, and electrochemical impedance spectroscopy in 6[Formula: see text]M KOH electrolyte. The highest specific capacitance (161[Formula: see text]F g[Formula: see text] at 0.5[Formula: see text]A g[Formula: see text] was obtained for the Fe oxide-doped carbon material (MOCC-Fe), which displayed a good life cycle with only a 10% capacitance decline after 2000 cycles.