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SCI Article

Flexible Lithium-Ion Batteries with High Areal Capacity Enabled by Smart Conductive Textiles
성명 이윤정()
소속 공과대학 에너지공학과
캠퍼스
우수선정주 2018년 12월 2째주
Author Ha, Sung Hoon (Dept Energy Engn); Shin, Kyu Hang (Dept Energy Engn); Park, Hae Won (Dept Energy Engn); 이윤정 (Dept Energy Engn);
Corresponding Author Info Lee, YJ (reprint author), Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea.
E-mail 이메일 아이콘yjlee94@hanyang.ac.kr
Document Type Article
Source SMALL Volume:14 Issue:43 Pages:- Published:2018
Times Cited 0
External Information http://dx.doi.org/10.1002/smll.201703418
Abstract Increasing demand for flexible devices in various applications, such as smart watches, healthcare, and military applications, requires the development of flexible energy-storage devices, such as lithium-ion batteries (LIBs) with high flexibility and capacity. However, it is difficult to ensure high capacity and high flexibility simultaneously through conventional electrode preparation processes. Herein, smart conductive textiles are employed as current collectors for flexible LIBs owing to their inherent flexibility, fibrous network, rough surface for better adhesion, and electrical conductivity. Conductivity and flexibility are further enhanced by nanosizing lithium titanate oxide (LTO) and lithium iron phosphate (LFP) active materials, and hybridizing them with a flexible 2D graphene template. The resulting LTO/LFP full cells demonstrate high areal capacity and flexibility with tolerance to mechanical fatigue. The battery achieves a capacity of 1.2 mA h cm(-2) while showing excellent flexibility. The cells demonstrate stable open circuit voltage retention under repeated flexing for 1000 times at a bending radius of 10 mm. The discharge capacity of the unflexed battery is retained in cells subjected to bending for 100 times at bending radii of 30, 20, and 10 mm, respectively, confirming that the suggested electrode configuration successfully prevents structural damage (delamination or cracking) upon repeated deformation.
Web of Science Categories Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
Funding Engineering Research Center of Excellence (ERC) Program; National Research Foundation (NRF), Korean Ministry of Science ICT (MSIT) [NRF-2017R1A5A1014708]; Korea Institute of Energy Technology Evaluation and Planning (KETEP) from the Ministry of Trade, Ind
Language English
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