Premium
Extremely Versatile Deformability beyond Materiality: A New Material Platform through Simple Cutting for Rugged Batteries
Author(s) -
Kim KeeBum,
Lee YoungJoo,
Costa Avelino,
Lee YuKi,
Jang TaeSik,
Lee MyoungGyu,
Joo YoungChang,
Oh Kyu Hwan,
Song Juha,
Choi InSuk
Publication year - 2019
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201900206
Subject(s) - materials science , auxetics , hinge , deformation (meteorology) , composite material , substrate (aquarium) , deformation mechanism , nanotechnology , mechanical engineering , oceanography , microstructure , engineering , geology
A rugged lithium‐ion battery (LIB) can be realized without any new material development through selective material matching based on localized deformation of a substrate induced by its well‐designed pattern. In particular, an auxetic cut flexible substrate accommodates various complex deformations and adaptive conformations through the hinge joints because the external force is highly localized in the hinges while the segmented motifs remain almost undeformed. The embedded LIB cells in undeformed regions of the auxetic cut silicon rubber sheet do not undergo large deformation, maintaining their battery performance regardless of loading conditions via the pattern‐associated deformation mechanism. The hierarchy and number of segmentations are the key parameters of the deformation mechanism for auxetic cut shape‐reconfigurable battery systems. The numerically and experimentally proven strategy that utilizes strain gradients induced by a patterned substrate as a design guideline for material matching can lead to various wearable and conformable designs without sacrificing the functionality and durability of electronic devices.