Kim, Joo-Seong Ko, Dongah Yoo, Dong-Joo Jung, Dae Soo Yavuz, Cafer T. Kim, Nam-In Choi, In-Suk Song, Jae Yong Choi, Jang Wook 2024-01-20T07:31:30Z 2024-01-20T07:31:30Z 2021-09-04 2015-04 1530-6984 https://pubs.kist.re.kr/handle/201004/125624 Most of the existing flexible lithium ion batteries (LIBs) adopt the conventional cofacial cell configuration where anode, separator, and cathode are sequentially stacked and so have difficulty in the integration with emerging thin LIB applications, such as smart cards and medical patches. In order to overcome this shortcoming, herein, we report a coplanar cell structure in which anodes and cathodes are interdigitatedly positioned on the same plane. The coplanar electrode design brings advantages of enhanced bending tolerance and capability of increasing the cell voltage by in series-connection of multiple single-cells in addition to its suitability for the thickness reduction. On the basis of these structural benefits, we develop a coplanar flexible LIB that delivers 7.4 V with an entire cell thickness below 0.5 mm while preserving stable electrochemical performance throughout 5000 (un)bending cycles (bending radius = 5 mm). Also, even the pouch case serves as barriers between anodes and cathodes to prevent Li dendrite growth and short-circuit formation while saving the thickness. Furthermore, for convenient practical use wireless charging via inductive electromagnetic energy transfer and solar cell integration is demonstrated. English AMER CHEMICAL SOC LITHIUM-ION BATTERIES SENSITIZED SOLAR-CELLS ENERGY-STORAGE DEVICES ELECTRONICS PAPER SUPERCAPACITOR TRANSISTORS SYSTEMS FIBERS ARRAYS A Half Millimeter Thick Coplanar Flexible Battery with Wireless Recharging Capability Article 10.1021/nl5045814 1 NANO LETTERS, v.15, no.4, pp.2350 - 2357 NANO LETTERS 15 4 2350 2357 scie scopus 000352750200021 2-s2.0-84927145659 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article LITHIUM-ION BATTERIES SENSITIZED SOLAR-CELLS ENERGY-STORAGE DEVICES ELECTRONICS PAPER SUPERCAPACITOR TRANSISTORS SYSTEMS FIBERS ARRAYS Coplanar structure flexible battery interelectrode barrier lithium ion battery wireless charging