TY - JOUR
T1 - Tuning the properties of a UV-polymerized, cross-linked solid polymer electrolyte for lithium batteries
AU - Sutton, Preston
AU - Airoldi, Martino
AU - Porcarelli, Luca
AU - Olmedo-Martínez, Jorge L.
AU - Mugemana, Clément
AU - Bruns, Nico
AU - Mecerreyes, David
AU - Steiner, Ullrich
AU - Gunkel, Ilja
PY - 2020/3/5
Y1 - 2020/3/5
N2 - Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.
AB - Lithium metal anodes have been pursued for decades as a way to significantly increase the energy density of lithium-ion batteries. However, safety risks caused by flammable liquid electrolytes and short circuits due to lithium dendrite formation during cell cycling have so far prevented the use of lithium metal in commercial batteries. Solid polymer electrolytes (SPEs) offer a potential solution if their mechanical properties and ionic conductivity can be simultaneously engineered. Here, we introduce a family of SPEs that are scalable and easy to prepare with a photopolymerization process, synthesized from amphiphilic acrylic polymer conetworks based on poly(ethylene glycol), 2-hydroxy-ethylacrylate, norbornyl acrylate, and either lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) or a single-ion polymethacrylate as lithium-ion source. Several conetworks were synthesized and cycled, and their ionic conductivity, mechanical properties, and lithium transference number were characterized. A single-ion-conducting polymer electrolyte shows the best compromise between the different properties and extends the calendar life of the cell.
KW - dual-ion and single-ion conductor
KW - lithium batteries
KW - scalable cross-linked polymer
KW - solid polymer electrolytes
KW - tunable matrix
KW - UV polymerization
KW - polymer networks
UR - http://www.scopus.com/inward/record.url?scp=85082651360&partnerID=8YFLogxK
U2 - 10.3390/polym12030595
DO - 10.3390/polym12030595
M3 - Article
AN - SCOPUS:85082651360
VL - 12
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 3
M1 - 595
ER -