TY - JOUR
T1 - Catalyst-Free Dynamic Networks for Recyclable, Self-Healing Solid Polymer Electrolytes
AU - Jing, Brian B.
AU - Evans, Christopher M.
N1 - Funding Information:
Funding to support this work was provided by the Energy Biosciences Institute through the EBI–Shell Program. We thank Andre Sustrino for assistance in acquiring and interpreting 11 B ssNMR data and Qiujie Zhao for solution NMR spectroscopy. We also acknowledge the use of facilities at the Materials Research Laboratory and the School of Chemical Sciences at UIUC.
Funding Information:
Funding to support this work was provided by the Energy Biosciences Institute through the EBI?Shell Program. We thank Andre Sustrino for assistance in acquiring and interpreting 11B ssNMR data and Qiujie Zhao for solution NMR spectroscopy. We also acknowledge the use of facilities at the Materials Research Laboratory and the School of Chemical Sciences at UIUC.
Publisher Copyright:
Copyright © 2019 American Chemical Society.
PY - 2019/12/4
Y1 - 2019/12/4
N2 - Polymer networks with dynamic covalent cross-links act as solids but can flow at high temperatures. They have been widely explored as reprocessable and self-healing materials, but their use as solid electrolytes is limited. Here we report poly(ethylene oxide)-based networks with varying amounts of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to understand the impact of a salt on the ion transport and network dynamics. We observed that the conductivity of our dynamic networks reached a maximum of 3.5 × 10-4 S/cm at an optimal LiTFSI concentration. Rheological measurements showed that the amount of LiTFSI significantly affects the mechanical properties, as the shear modulus varies between 1 and 10 MPa and the stress relaxation by 2 orders of magnitude. Additionally, we found that these networks can efficiently dissolve back to pure monomers and heal to recover their conductivity after damage, showing the potential of dynamic networks as sustainable solid electrolytes.
AB - Polymer networks with dynamic covalent cross-links act as solids but can flow at high temperatures. They have been widely explored as reprocessable and self-healing materials, but their use as solid electrolytes is limited. Here we report poly(ethylene oxide)-based networks with varying amounts of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to understand the impact of a salt on the ion transport and network dynamics. We observed that the conductivity of our dynamic networks reached a maximum of 3.5 × 10-4 S/cm at an optimal LiTFSI concentration. Rheological measurements showed that the amount of LiTFSI significantly affects the mechanical properties, as the shear modulus varies between 1 and 10 MPa and the stress relaxation by 2 orders of magnitude. Additionally, we found that these networks can efficiently dissolve back to pure monomers and heal to recover their conductivity after damage, showing the potential of dynamic networks as sustainable solid electrolytes.
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U2 - 10.1021/jacs.9b09811
DO - 10.1021/jacs.9b09811
M3 - Article
C2 - 31743006
AN - SCOPUS:85075793126
SN - 0002-7863
VL - 141
SP - 18932
EP - 18937
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 48
ER -