TY - JOUR
T1 - Ternary electrolyte additive mixture for 5V lithium-ion battery cells
AU - Binder, Markus
AU - Kuenzel, Matthias
AU - Diemant, Thomas
AU - Jusys, Zenonas
AU - Behm, R. Jürgen
AU - Binder, Joachim R.
AU - Stock, Sandro
AU - Diller, Felix
AU - Daub, Rüdiger
AU - Passerini, Stefano
AU - Bresser, Dominic
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2025/2/28
Y1 - 2025/2/28
N2 - Cobalt-free LiNi0.5Mn1.5O4 (LNMO) is a promising alternative to the commonly used cobalt-containing positive electrode active materials in lithium-ion batteries (LIBs), owing to its high redox potential, relatively low cost, and low environmental impact. The high cell voltage, however, comes along with several challenges that need to be overcome before the material can be successfully used in commercial cells. Herein, these challenges are addressed by introducing three additives into the liquid organic carbonate-based electrolyte, namely tris(trimethylsilyl)-phosphite (TTSPi), lithium bis(oxalato) borate (LiBOB), and ethyl-(2,2,2-trifluoroethyl) carbonate (TFEC). The optimized electrolyte composition enables superior performance of Li‖LNMO and graphite‖LNMO cells because of the stabilized interphases at both the negative and the positive electrode and, thus, suppressed electrolyte decomposition. This is demonstrated by the substantially reduced gassing upon cycling and shelf-storage. These results are anticipated to contribute to the successful commercialization of LNMO in more sustainable LIBs.
AB - Cobalt-free LiNi0.5Mn1.5O4 (LNMO) is a promising alternative to the commonly used cobalt-containing positive electrode active materials in lithium-ion batteries (LIBs), owing to its high redox potential, relatively low cost, and low environmental impact. The high cell voltage, however, comes along with several challenges that need to be overcome before the material can be successfully used in commercial cells. Herein, these challenges are addressed by introducing three additives into the liquid organic carbonate-based electrolyte, namely tris(trimethylsilyl)-phosphite (TTSPi), lithium bis(oxalato) borate (LiBOB), and ethyl-(2,2,2-trifluoroethyl) carbonate (TFEC). The optimized electrolyte composition enables superior performance of Li‖LNMO and graphite‖LNMO cells because of the stabilized interphases at both the negative and the positive electrode and, thus, suppressed electrolyte decomposition. This is demonstrated by the substantially reduced gassing upon cycling and shelf-storage. These results are anticipated to contribute to the successful commercialization of LNMO in more sustainable LIBs.
KW - Additives
KW - Aqueous processing
KW - Electrolyte
KW - High-voltage cathode
KW - Lithium-ion battery
UR - http://www.scopus.com/inward/record.url?scp=85212332415&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2024.236073
DO - 10.1016/j.jpowsour.2024.236073
M3 - Article
AN - SCOPUS:85212332415
SN - 0378-7753
VL - 630
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 236073
ER -