Press Release Archive

  • home_icon HOME
  • News
  • Press Release Archive

Since the battery can be charged wirelessly, useful applications are expected including medical patches and smart cards.

 

Professor Jang Wook Choi at KAIST’s Graduate School of Energy, Environment, Water, and Sustainability (EEWS) and Dr. Jae Yong Song at the Korea Research Institute of Standards and Science jointly led research to invent a flexible lithium ion battery that is thinner than a credit card and can be charged wirelessly.

 

Their research findings were published online in Nano Letters on March 6, 2015. Lithium ion batteries are widely used today in various electronics including mobile devices and electronic cars. Researchers said that their work could help accelerate the development of flexible and wearable electronics.

 

Conventional lithium ion batteries are manufactured based on a layering technology, stacking up anodes, separating films, and cathodes like a sandwich, which makes it difficult to reduce their thickness. In addition, friction arises between layers, making the batteries impossible to bend. The coating films of electrodes easily come off, which contributes to the batteries’ poor performance.


The research team abandoned the existing production technology. Instead, they removed the separating films, layered the cathodes and anodes collinearly on a plane, and created a partition between electrodes to eliminate potential problems, such as short circuits and voltage dips, commonly present in lithium ion batteries.

 

After more than five thousand consecutive flexing experiments, the research team confirmed the possibility of a more flexible electrode structure while maintaining the battery performance comparable to the level of current lithium ion batteries.

 

Flexible batteries can be applied to integrated smart cards, cosmetic and medical patches, and skin adhesive sensors that can control a computer with voice commands or gesture as seen in the movie “Iron Man.”

 

Moreover, the team has successfully developed wireless-charging technology using electromagnetic induction and solar batteries.

 

They are currently developing a mass production process to combine this planar battery technology and printing, to ultimately create a new paradigm to print semiconductors and batteries using 3D printers.

 

Professor Choi said, “This new technology will contribute to diversifying patch functions as it is applicable to power various adhesive medical patches.”

 

Picture 1: Medical patch (left) and flexible secondary battery (right)

flexible%20battery_March%202015.jpg


Picture 2: Diagram of flexible battery

Diagram%20of%20flexible%20battery.jpg


Picture 3: Smart card embedding flexible battery

Smart%20card%20embedding%20flexible%20battery.jpg



List of Articles
No. Category Subject Author Date Views
35 Others A Firefighter Drone That Flies and Crawls Up Walls [2016-01-20] file KAIST_INSTITUTE 2016.06.18 25540
34 KIHST Next-generation Holographic Microscope for 3D Live Cell Imaging [2016-03-29] file KAIST_INSTITUTE 2016.06.18 19835
33 KIHST Fast and Accurate 3-D Imaging Technique to Track Optically-Trapped Particles [2015-08-06] file KAIST_INSTITUTE 2016.06.10 16400
» KINC KAIST Develope a Credit-Card-Thick Flexible Lithium Ion Battery [2015-08-06] file KAIST_INSTITUTE 2016.06.10 16306
31 KIB Appointed as Head Director of the Global Frontier Program (GFP) of National Research Foundation [2012-01-12] file KAIST_INSTITUTE 2016.06.10 13865
30 KIHST Anti-Cancer Therapy Delivering Drug to an Tumor Developed by KAIST Researchers [2015-08-06] file KAIST_INSTITUTE 2016.06.10 12210
29 KIB Prof. Sang-Yup Lee's Team Pioneers Biotechnological Production of Chemical Using Renewable Materials [2009-11-02] KAIST_INSTITUTE 2016.06.09 11568
28 KINC KAIST Researchers Develop a Technology to Enable Unzipping of the Graphene Plane [2016-03-22] file KAIST_INSTITUTE 2016.06.18 11408
27 KIB Professor Sang-Yup Lee Named Senior Editor of U.S. Biotechnology Journal [2007-02-07] KAIST_INSTITUTE 2016.06.08 10631
26 KINC Graphene-based Transparent Electrodes for Highly Efficient Flexible OLEDs [2016-06-07] file KAIST_INSTITUTE 2016.06.18 10551
25 Others KIUSS Research Contract on the Branch of 'Smart Green City' [2012-01-12] file KAIST_INSTITUTE 2016.06.10 10253
24 Others 융합연구기획과제 성과 - 대학 캠퍼스 내 실내외 통합 내비게이션 개발 [2015-09-17] file KAIST_INSTITUTE 2016.06.10 8199
23 KIHST Ultrashort EUV Pulses generation using high harmonic generation by plasmonic field enhancement [2012-01-12] file KAIST_INSTITUTE 2016.06.10 7440
22 KINC 최성율 교수 도장 찍듯이 자유롭게 그래핀 옮기는 기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 7350
21 KIR BBC News Channel's Technology Program "Click"Aired KAIST's Jellyfish Robot [2015-08-06] file KAIST_INSTITUTE 2016.06.10 7307
20 KIR Developes Industry's First Cargo Hold for LNG Tankers [2012-01-12] file KAIST_INSTITUTE 2016.06.10 7181
19 KINC 조병진, 임성갑, 유승협 교수 휘어지는 10나노미터 고분자 절연막 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 7041
18 KINC 전기적 자기적 성질 동시에 갖는 신물질 물성 규명 [2012-01-17] file KAIST_INSTITUTE 2016.06.10 6036
17 KIITC KAIST's Smart E-book System More Convenient than Paper-based Books [2012-02-19] file KAIST_INSTITUTE 2016.06.10 5967
16 KINC 보다 태양빛에 가까운 LED 개발 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 5796
Board Pagination Prev 1 2 Next
/ 2

KAIST 291 Daehak-ro, Yuseong-gu, Daejeon (34141)
T : +82-42-350-2381~2384
F : +82-42-350-2080
Copyright (C) 2015. KAIST Institute