TY - JOUR
T1 - Magnesium Polymer Electrolytes Based on the Polycarbonate Poly(2-butyl-2-ethyltrimethylene-carbonate)
AU - Sundermann, David A.
AU - Park, Bumjun
AU - Hirschberg, Valerian
AU - Schaefer, Jennifer L.
AU - Théato, Patrick
N1 - Funding Information:
This work contributes to the research performed at CELEST (Center for Electrochemical Energy Storage Ulm-Karlsruhe) and was funded by the German Research Foundation (DFG) under Project ID 390874152 (POLiS Cluster of Excellence). Researchers at the University of Notre Dame thank the National Science Foundation for financial support via grant CBET-2044386.
Funding Information:
The authors thank the ND Energy Materials Characterization Facility (MCF) for the use of the Raman microscope. The MCF is funded by the Sustainable Energy Initiative (SEI), which is part of the Center for Sustainable Energy at Notre Dame (ND Energy).
Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2023/7/4
Y1 - 2023/7/4
N2 - Magnesium electrolytes based on a polycarbonate with either magnesium tetrakis(hexafluoroisopropyloxy) borate (Mg(B(HFIP)4)2) or magnesium bis(trifluoromethanesulfonyl)imide (Mg(TFSI)2) for magnesium batteries were prepared and characterized. The side-chain-containing polycarbonate, poly(2-butyl-2-ethyltrimethylene carbonate) (P(BEC)), was synthesized by ring opening polymerization (ROP) of 5-ethyl-5-butylpropane oxirane ether carbonate (BEC) and mixed with Mg(B(HFIP)4)2 or Mg(TFSI)2 to form low- and high-salt-concentration polymer electrolytes (PEs). The PEs were characterized by impedance spectroscopy, differential scanning calorimetry (DSC), rheology, linear sweep voltammetry, cyclic voltammetry, and Raman spectroscopy. A transition from classical salt-in-polymer electrolytes to polymer-in-salt electrolytes was indicated by a significant change in glass transition temperature as well as storage and loss moduli. Ionic conductivity measurements indicated the formation of polymer-in-salt electrolytes for the PEs with 40 mol % Mg(B(HFIP)4)2 (HFIP40). In contrast, the 40 mol % Mg(TFSI)2 PEs showed mainly the classical behavior. HFIP40 was further found to have an oxidative stability window greater than 6 V vs Mg/Mg2+, but showed no reversible stripping-plating behavior in an Mg||SS cell.
AB - Magnesium electrolytes based on a polycarbonate with either magnesium tetrakis(hexafluoroisopropyloxy) borate (Mg(B(HFIP)4)2) or magnesium bis(trifluoromethanesulfonyl)imide (Mg(TFSI)2) for magnesium batteries were prepared and characterized. The side-chain-containing polycarbonate, poly(2-butyl-2-ethyltrimethylene carbonate) (P(BEC)), was synthesized by ring opening polymerization (ROP) of 5-ethyl-5-butylpropane oxirane ether carbonate (BEC) and mixed with Mg(B(HFIP)4)2 or Mg(TFSI)2 to form low- and high-salt-concentration polymer electrolytes (PEs). The PEs were characterized by impedance spectroscopy, differential scanning calorimetry (DSC), rheology, linear sweep voltammetry, cyclic voltammetry, and Raman spectroscopy. A transition from classical salt-in-polymer electrolytes to polymer-in-salt electrolytes was indicated by a significant change in glass transition temperature as well as storage and loss moduli. Ionic conductivity measurements indicated the formation of polymer-in-salt electrolytes for the PEs with 40 mol % Mg(B(HFIP)4)2 (HFIP40). In contrast, the 40 mol % Mg(TFSI)2 PEs showed mainly the classical behavior. HFIP40 was further found to have an oxidative stability window greater than 6 V vs Mg/Mg2+, but showed no reversible stripping-plating behavior in an Mg||SS cell.
UR - https://www.scopus.com/pages/publications/85164460578
UR - https://www.mendeley.com/catalogue/e26d642d-3bee-3bd3-a19e-85bc712b1c59/
U2 - 10.1021/acsomega.3c00761
DO - 10.1021/acsomega.3c00761
M3 - Article
AN - SCOPUS:85164460578
SN - 2470-1343
VL - 8
SP - 23510
EP - 23520
JO - ACS Omega
JF - ACS Omega
IS - 26
ER -