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 Graphene-based Transparent Electrodes for Highly Efficient Flexible OLEDs [2016-06-07] file KAIST_INSTITUTE 2016.06.18 48230
34 KIHST Next-generation Holographic Microscope for 3D Live Cell Imaging [2016-03-29] file KAIST_INSTITUTE 2016.06.18 50041
33 KINC KAIST Researchers Develop a Technology to Enable Unzipping of the Graphene Plane [2016-03-22] file KAIST_INSTITUTE 2016.06.18 15297
32 Others A Firefighter Drone That Flies and Crawls Up Walls [2016-01-20] file KAIST_INSTITUTE 2016.06.18 66789
31 Others 융합연구기획과제 성과 - 대학 캠퍼스 내 실내외 통합 내비게이션 개발 [2015-09-17] file KAIST_INSTITUTE 2016.06.10 9586
30 KIR BBC News Channel's Technology Program "Click"Aired KAIST's Jellyfish Robot [2015-08-06] file KAIST_INSTITUTE 2016.06.10 8519
29 KIHST Fast and Accurate 3-D Imaging Technique to Track Optically-Trapped Particles [2015-08-06] file KAIST_INSTITUTE 2016.06.10 22675
28 KIHST Anti-Cancer Therapy Delivering Drug to an Tumor Developed by KAIST Researchers [2015-08-06] file KAIST_INSTITUTE 2016.06.10 24607
» KINC KAIST Develope a Credit-Card-Thick Flexible Lithium Ion Battery [2015-08-06] file KAIST_INSTITUTE 2016.06.10 61193
26 KINC 조병진, 임성갑, 유승협 교수 휘어지는 10나노미터 고분자 절연막 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8235
25 KIITC 박인규 교수, 공기오염 측정 센서 원천기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 5916
24 KINC 최성율 교수 도장 찍듯이 자유롭게 그래핀 옮기는 기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8575
23 KIHST KIOST 김승우 연구소장 올해 국가과학자 선정 [2012-09-20] KAIST_INSTITUTE 2016.06.10 5100
22 KIHST 이제는 세포 내부도 훤히 들여다본다 [2012-01-27] file KAIST_INSTITUTE 2016.06.10 4993
21 KINC 전기적 자기적 성질 동시에 갖는 신물질 물성 규명 [2012-01-17] file KAIST_INSTITUTE 2016.06.10 7297
20 KINC LED의 새로운 발견, 형광체 없이 다양한 색깔의 빛 낸다 [2012-01-17] file KAIST_INSTITUTE 2016.06.10 6122
19 KIITC KAIST's Smart E-book System More Convenient than Paper-based Books [2012-02-19] file KAIST_INSTITUTE 2016.06.10 7106
18 KINC 보다 태양빛에 가까운 LED 개발 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 6965
17 KIITC 초슬림 휴대폰 나온다 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 4685
16 KIB Appointed as Head Director of the Global Frontier Program (GFP) of National Research Foundation [2012-01-12] file KAIST_INSTITUTE 2016.06.10 45390
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