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 KINC 최성율 교수 도장 찍듯이 자유롭게 그래핀 옮기는 기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8490
34 KIITC 초슬림 휴대폰 나온다 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 4615
33 KINC 조병진, 임성갑, 유승협 교수 휘어지는 10나노미터 고분자 절연막 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8101
32 KINC 전기적 자기적 성질 동시에 갖는 신물질 물성 규명 [2012-01-17] file KAIST_INSTITUTE 2016.06.10 7173
31 KIHST 이제는 세포 내부도 훤히 들여다본다 [2012-01-27] file KAIST_INSTITUTE 2016.06.10 4910
30 KIB 이상엽, 정하웅 교수팀, 가상세포로 필수대사물질 발굴, 간겅성 문제 규명 [2007-08-16] file KAIST_INSTITUTE 2016.06.08 5344
29 Others 융합연구기획과제 성과 - 대학 캠퍼스 내 실내외 통합 내비게이션 개발 [2015-09-17] file KAIST_INSTITUTE 2016.06.10 9450
28 KINC 보다 태양빛에 가까운 LED 개발 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 6862
27 KIITC 박인규 교수, 공기오염 측정 센서 원천기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 5834
26 KIR 대한민국 특허왕 이대길 교수, 올해의 KAIST인에 선정 [2009-11-23] file KAIST_INSTITUTE 2016.06.09 5531
25 KIR Won the Outstanding Indistry-cooperation Awardby Hyundai Motor Company [2011-12-13] file KAIST_INSTITUTE 2016.06.10 5595
24 Others Won the NAS Award (National Academy of Science Award) file KAIST_INSTITUTE 2016.06.09 4307
23 KIITC Won the Largh-scale Convergence Project Contract [2012-01-12] file KAIST_INSTITUTE 2016.06.10 8394
22 KIHST Ultrashort EUV Pulses generation using high harmonic generation by plasmonic field enhancement [2012-01-12] file KAIST_INSTITUTE 2016.06.10 22362
21 KIITC Technology Transfer for Powerless/ wireless Keyboard [2010-07-20] file KAIST_INSTITUTE 2016.06.09 5671
20 Others Synthesis of Calcium Crystals on Any Material Surfaces is Developed [2010-07-20] file KAIST_INSTITUTE 2016.06.09 5010
19 KIB Professor Sang-Yup Lee Named Senior Editor of U.S. Biotechnology Journal [2007-02-07] KAIST_INSTITUTE 2016.06.08 12205
18 KIB Prof. Sang-Yup Lee's Team Pioneers Biotechnological Production of Chemical Using Renewable Materials [2009-11-02] KAIST_INSTITUTE 2016.06.09 20905
17 KIR Prof. Jung Kim's project has been selected to the research project for Public Welfare Safety [2010-08-16] KAIST_INSTITUTE 2016.06.10 4965
16 KIHST Next-generation Holographic Microscope for 3D Live Cell Imaging [2016-03-29] file KAIST_INSTITUTE 2016.06.18 49761
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