Fabrication of Shape-conformable Batteries Based on 3D-printing Technology

Figure 1.Fabrication of shape-conformable batteries based on 3D-printing technology and the application of polyaniline carbon nanofiber cathodes and wearable electronic gadgets.
from left: Dr. Bok Yeop Ahn, Dr. Chanhoon Kim, Professor Il-Doo Kim and Professor Jennifer A. Lewis (from left: Dr. Bok Yeop Ahn, Dr. Chanhoon Kim, Teacher Il-Doo Kim and Teacher Jennifer A. Lewis)

Versatile, cordless electronic gadgets are quickly emerging and have actually reached the level of commercialization; however, most of battery shapes are restricted to either round and/or rectangle-shaped structures, which leads to ineffective space usage. Teacher Il-Doo Kim’s group from the Department of Products Science at KAIST has actually effectively established technology to considerably improve the irregularity of battery style through cooperation research study with Teacher Jennifer A. Lewis and her group from the School of Engineering and Applied Sciences at Harvard University.

A Lot Of of the battery forms today are enhanced for coin cell and/or pouch cells. Because the battery as an energy storage gadget inhabits most of the space in microelectronic gadgets with various styles, brand-new technology to easily alter the shape of the battery is needed.

The KAIST-Harvard research study cooperation group has actually effectively produced different kinds of battery shapes, such as ring-type, H, and U shape, utilizing 3D printingtechnology And through the research study cooperation with Dr. Youngmin Choi at the Korea Research Study Institute of Chemical Technology (KRICT), 3D-printed batteries were used to small wearable electronic gadgets (wearable light sensing unit rings).

The research study group has actually embraced eco-friendly liquid Zn-ion batteries to make personalized battery packs. This system, which utilizes Zn2+ rather of Li+ as charge providers, is much more secure compared to the traditional lithium rechargeable batteries that utilize extremely flammable natural electrolytes. Furthermore, the processing conditions of lithium-ion batteries are extremely complex since natural solvents can fire up upon direct exposure to wetness and oxygen.

As the liquid Zn-ion batteries embraced by the research study group are steady upon contact with climatic wetness and oxygen, they can be produced in the ambient air condition, and have benefits in product packaging considering that packaged plastic does not liquify in water even when plastic product packaging is used utilizing a 3D printer.

To make a steady cathode that can be regulated in different types and enables high charge-discharge, the research study group produced a carbon fiber existing collector utilizing electrospinning procedure and evenly layered electrochemically active polyaniline conductive polymer on the surface area of carbon fiber for a present collector-active layer incorporated cathode. The cathode, based on conductive polyaniline consisting of a 3D structure, displays extremely quick charging speeds (50% of the charge in 2 minutes) and can be produced without the detachment of active cathode products, so different battery types with high mechanical stability can be produced.

Prof. Kim stated, “Zn-ion batteries employing aqueous electrolytes have the advantage of fabrication under ambient conditions, so it is easy to fabricate the customized battery packs using 3D printing.”
“3D-printed batteries can be easily applied for niche applications such as wearable, personalized, miniaturized micro-robots, and implantable medical devices or microelectronic storage devices with unique designs,” included Teacher Lewis.

With Dr. Chanhoon Kim in the Department of Products Science and Engineering at KAIST and Dr. Bok Yeop Ahn School of Engineering and Applied Sciences at Harvard University taking part as similarly contributing very first authors, this work was released in the December problem of ACS Nano.

This work was economically supported by the Global Lab (NRF-2015 K1A1A2029679) and Wearable Platform Products Technology Center (2016 R1A5A1009926).

Figure 2.Fabricated shape-conformable batteries based on a 3D-printing method Figure 2. Made shape-conformable batteries based on a 3D-printing approach

On The Other Hand, Teacher Il-Doo Kim was just recently designated as a Partner Editor of ACS Nano, an extremely prominent journal in the field of nanoscience.

Teacher Kim stated, “It is my great honor to be an Associate Editor of the highly renowned journal ACS Nano, which has an impact factor reaching 13.709 with 134,596 citations as of 2017. Through the editorial activities in the fields of energy, I will dedicate myself to improving the prominence of KAIST and expanding the scope of Korea’s science and technology. I will also contribute to carrying out more international collaborations with world-leading research groups.”

Associate Editor of ACS Nano Professor Il-Doo Kim (Partner Editor of ACS Nano Teacher Il-Doo Kim)

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