TY  - JOUR
AU  - Yao, Mingyue
AU  - Wu, Baohu
AU  - Feng, Xunda
AU  - Sun, Shengtong
AU  - Wu, Peiyi
TI  - A Highly Robust Ionotronic Fiber with Unprecedented Mechanomodulation of Ionic Conduction
JO  - Advanced materials
VL  - 33
IS  - 42
SN  - 1521-4095
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-03873
SP  - 2103755
PY  - 2021
AB  - Stretchable ionic conductors are appealing for tissue-like soft electronics, yet suffer from a tardy mechanoelectric response due to their poor modulation of ionic conduction arising from intrinsic homogeneous soft chain network. Here, a highly robust ionotronic fiber is designed by synergizing ionic liquid and liquid crystal elastomer with alternate rigid mesogen units and soft chain spacers, which shows an unprecedented strain-induced ionic conductivity boost (≈103 times enhanced as stretched to 2000% strain). Such a surprisingly high enhancement is attributed to the formation of microphase-separated low-tortuosity ion-conducting nanochannels guided by strain-induced emergence of aligned smectic mesophases, thus allowing for ultrafast ion transport that resembles the role of “swimming lanes.” Intriguingly, the boosting conductivity even reverses Pouillet's Law-dictated resistance increase at certain strains, leading to unique waveform-discernible strain sensing. Moreover, the fiber retains thermal actuation properties with a maximum of 70% strain changes upon heating, and enables integrated self-perception and actuation. The findings offer a promising molecular engineering route to mechanically modulate the ion transport behavior of ionic conductors toward advanced ionotronic applications.
LB  - PUB:(DE-HGF)16
C6  - pmid:34477247
UR  - <Go to ISI:>//WOS:000692649300001
DO  - DOI:10.1002/adma.202103755
UR  - https://juser.fz-juelich.de/record/901865
ER  -