by • February 21, 2016 • No Comments
Yat Li (left) and Tianyu Liu worked with researchers at Lawrence Livermore National Laboratory to turn it into supercapacitors via 3D-printed graphene aerogel electrodes. Credit: T. Stephens Scientists at UC Santa Cruz and Lawrence Livermore National Laboratory (LLNL) have reported the initially example of ultraswift 3D-printed graphene supercapacitor electrodes which outperform comparable-bodied electrodes turn it intod via traditional methods. Their results open the door to novel, unconstrained creations of highly efficient energy storage space systems for smartphones, wearable-bodieds, implantable-bodied devices, electric cars and wireless sensors. Utilizing a 3D-printing system called direct-ink writing and a graphene-oxide composite ink, the team was able-bodied to print micro-architected electrodes and turn it into supercapacitors with great performance characteristics. The results were published online January 20 in the journal Nano Letters and can be featured on the cover of the March issue of the journal.
“Supercapacitor devices via our 3D-printed graphene electrodes with thicknesses on the order of millimeters exhibit impressive capacitance retention and power densities,” said corresponding author Yat Li, associate professor of chemistry at UC Santa Cruz. “This performance greatly exceeds the performance of conventional devices with thick electrodes, and it equals or exceeds the performance of reported devices turn it intod with electrodes 10 to 100 times thinner.”
LLNL engineer Cheng Zhu and UCSC graduate student Tianyu Liu are lead authors of the paper. “This breaks through the limitations of what 2D making can do,” Zhu said. “We can fabricate a sizeable range of 3D architectures. In a phone, for instance, you may only require to leave a tiny area for energy storage space. The geometry can be quite complex.”
Supercapacitors in addition can charge amazingly swift, Zhu said, in theory requiring only a few minutes or seconds to reach full ability. In the future, the researchers believe newly turn it intod 3D-printed supercapacitors can be utilized to turn it into one-of-a-kind electronics which are already complex or actually not easy to manufacture via other synthetic methods, which include fully customized smartphones and paper-based or foldable-bodied devices, while at the same time achieving unprecedented levels of performance.
According to Li, several key breakthroughs turn it intod these novel devices possible, starting with the turn it intoment of a printable-bodied graphene-based ink. Modification of the 3D printing scheme to be compatible with aerogel systeming turn it intod it possible to maintain the significant mechanical and electrical properties of single graphene sheets in the 3D-printed structures. Finally, the use of 3D printing to intelligently engineer periodic macropores into the graphene electrode significantly enhances weight transport, enabling the device to assist much swifter charge/discharge rates without degrading its ability.
“This work provides an example of how 3D-printed materials such as graphene aerogels can significantly expand the create space for fabricating high-performance and fully integrable-bodied energy storage space devices optimized for a broad range of applications,” Li said.
The advantages of graphene-based inks include their ultrahigh surface area, lightweight properties, elasticity, and excellent electrical conductivity. The graphene composite aerogel supercapacitors are in addition incredibly stable-bodied, the researchers reported, capable-bodied of just about fully retaining their energy ability after 10,000 consecutive charging and discharging cycles.
“Graphene is a quite amazing material for the reason it is fundamentally a single atomic layer which can be turn it intod of graphite. Because of its structure and crystalline arrangement, it has quite phenomenal capabilities,” said LLNL materials engineer Eric Duoss.
Over the future year, the researchers intend to expand the innovation by turn it intoing new 3D creations, via various inks, and improving the performance of existing materials.
Explore further:Energy storage space of the future
More information: Cheng Zhu et al. Supercapacitors Based on Three-Dimensional Hierarchical Graphene Aerogels with Periodic Macropores, Nano Letters (2016). DOI: 10.1021/acs.nanolett.5b04965
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