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Flexible Lithium-Ion Batteries with High Areal Capacity Enabled by Smart Conductive Textiles

Title
Flexible Lithium-Ion Batteries with High Areal Capacity Enabled by Smart Conductive Textiles
Author
이윤정
Keywords
areal capacities; current collectors; electrodes; flexible batteries; smart conductive textiles
Issue Date
2018-02
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v. 14, no. 43, Article no. 1703418
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.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/smll.201703418http://repository.hanyang.ac.kr/handle/20.500.11754/117558
ISSN
1613-6810; 1613-6829
DOI
10.1002/smll.201703418
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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