Recent advances in ink-based additive manufacturing for porous structures

Self Cite

Tailoring thermal transport by structural parameters could result in mechanically fragile and brittle networks. An indispensable goal is to design hierarchical architecture materials that combine thermal and mechanical properties in a continuous and cohesive network. A promising strategy to create such a hierarchical network targets additive manufacturing of hybrid porous voxels at nanoscale. Here we describe the convergence of agile additive manufacturing of porous hybrid voxels to tailor hierarchically and mechanically tunable objects. In one strategy, the uniformly distributed porous silica voxels, which form the basis for the control of thermal transport, are non-covalently interfaced with polymeric networks, yielding hierarchic super-elastic architectures with thermal insulation properties. Another additive strategy for achieving mechanical strength involves the versatile orthogonal surface hybridization of porous silica voxels retains its low thermal conductivity of 19.1 mW m−1 K−1, flexible compressive recovery strain (85%), and tailored mechanical strength from 71.6 kPa to 1.5 MPa. The printed lightweight high-fidelity objects promise thermal aging mitigation for lithium-ion batteries, providing a thermal management pathway using 3D printed silica objects.

Section: Resultsmentioning

confidence: 99%

Tailoring thermal insulation architectures from additive manufacturing

Guo

et al. 2022

Self Cite

“…The icetemplating coupled with additive manufacturing enables a network of linked cellulose and high porosity in the printed [Hdabco]ClO 4 (Supplementary Figs. [19][20][21], where its tunable densities of 0.34, 0.35, 0.37, and 0.46 g cm −3 are obtained at different weight ratios (cellulose/ [Hdabco]ClO 4 ) of 0, 1/6, 1/5, and 1/3, respectively (Fig. 4b).…”

Section: Structural Properties and Thermal Analysis Of 3d Printed [Hd...mentioning

confidence: 96%

“…1b ) 16 , 17 . The combination of ice-templating assembly and additive manufacturing enables to bridge across multiple length scale 18 – 21 , and the creation of three-dimensional (3D) aligned porous molecular energetic ferroelectrics with complex geometries, large surface area, and low density of 0.35 g cm −3 . Pyrolysis-gas chromatography-mass spectrometry (GC/MS) and high-pressure differential scanning colorimetry (HP-DSC) analysis suggest that the Cl radicals from ClO 4 − react exothermically with both cellulose and dabco, enabling a large exothermic heat of reaction (6180 kJ kg −1 ).…”

Section: Introductionmentioning

confidence: 99%

Releasing chemical energy in spatially programmed ferroelectrics

Gottfried

Pesce‐Rodriguez

et al. 2022

Chemical energy ferroelectrics are generally solid macromolecules showing spontaneous polarization and chemical bonding energy. These materials still suffer drawbacks, including the limited control of energy release rate, and thermal decomposition energy well below total chemical energy. To overcome these drawbacks, we report the integrated molecular ferroelectric and energetic material from machine learning-directed additive manufacturing coupled with the ice-templating assembly. The resultant aligned porous architecture shows a low density of 0.35 g cm−3, polarization-controlled energy release, and an anisotropic thermal conductivity ratio of 15. Thermal analysis suggests that the chlorine radicals react with macromolecules enabling a large exothermic enthalpy of reaction (6180 kJ kg−1). In addition, the estimated detonation velocity of molecular ferroelectrics can be tuned from 6.69 ± 0.21 to 7.79 ± 0.25 km s−1 by switching the polarization state. These results provide a pathway toward spatially programmed energetic ferroelectrics for controlled energy release rates.

“…The poly(ethylene glycol) diacrylate (PEGDA)-cross-linked hydrogels (Fig. 2b) show a porous cellular structure with macropores of several micrometers in diameter 20 . These connected pores in hydrogel store the injected proton medium and provide the pathways for transporting protons to electrodes 14 .…”

Section: Electrochemical Analysismentioning

confidence: 99%

Molecular magneto-ionic proton sensor in solid-state proton battery

Guo

Chen

et al. 2022

High proton conductivity originated from its small size and the diffusion-free Grotthuss mechanism offers immense promise for proton-based magneto-ionic control of magnetic materials. Despite such promise, the realization of proton magneto-ionics is hampered by the lack of proton-responsive magnets as well as the solid-state sensing method. Here, we report the proton-based magneto-ionics in molecule-based magnet which serves as both solid-state proton battery electrode and radiofrequency sensing medium. The three-dimensional hydrogen-bonding network in such a molecule-based magnet yields a high proton conductivity of 1.6 × 10−3 S cm−1. The three-dimensional printed vascular hydrogel provides the on-demand proton stimulus to enable magneto-ionics, where the Raman spectroscopy shows the redox behavior responsible for the magnetism control. The radiofrequency proton sensor shows high sensitivity in a wide proton concentration range from 10−6 to 1 molar under a low working radiofrequency and magnetic field of 1 GHz and 405 Oe, respectively. The findings shown here demonstrate the promising sensing application of proton-based magneto-ionics.