TY - JOUR
T1 - Aging-Driven Composition and Distribution Changes of Electrolyte and Graphite Anode in 18650-Type Li-Ion Batteries
AU - Petz, Dominik
AU - Baran, Volodymyr
AU - Peschel, Christoph
AU - Winter, Martin
AU - Nowak, Sascha
AU - Hofmann, Michael
AU - Kostecki, Robert
AU - Niewa, Rainer
AU - Bauer, Michael
AU - Müller-Buschbaum, Peter
AU - Senyshyn, Anatoliy
N1 - Publisher Copyright:
© 2022 The Authors. Advanced Energy Materials published by Wiley-VCH GmbH.
PY - 2022/12/1
Y1 - 2022/12/1
N2 - A series of low-temperature studies on LiNi0.80Co0.15Al0.05O2 18650-type batteries of high-energy type with different stabilized states of fatigue is carried out using spatially resolved neutron powder diffraction, infrared/thermal imaging, and quasi-adiabatic calorimetry. In-plane distribution of lithium in the graphite anode and frozen electrolyte in fully charged state is determined non-destructively with neutron diffraction and correlated to the introduced state of fatigue. An independent electrolyte characterization is performed via calorimetry studies on variously aged 18650-type lithium-ion batteries, where the shape of the thermodynamic signal is evolving with the state of fatigue of the cells. Analyzing the liquid electrolyte extracted/harvested from the studied cells reveals the decomposition of conducting salt to be the main driving factor for fatigue in the electrolyte degradation.
AB - A series of low-temperature studies on LiNi0.80Co0.15Al0.05O2 18650-type batteries of high-energy type with different stabilized states of fatigue is carried out using spatially resolved neutron powder diffraction, infrared/thermal imaging, and quasi-adiabatic calorimetry. In-plane distribution of lithium in the graphite anode and frozen electrolyte in fully charged state is determined non-destructively with neutron diffraction and correlated to the introduced state of fatigue. An independent electrolyte characterization is performed via calorimetry studies on variously aged 18650-type lithium-ion batteries, where the shape of the thermodynamic signal is evolving with the state of fatigue of the cells. Analyzing the liquid electrolyte extracted/harvested from the studied cells reveals the decomposition of conducting salt to be the main driving factor for fatigue in the electrolyte degradation.
KW - aging
KW - conducting lithium salt
KW - differential thermal analysis
KW - electrolyte compositions
KW - lithium-ion batteries
KW - neutron powder diffraction
UR - http://www.scopus.com/inward/record.url?scp=85139145465&partnerID=8YFLogxK
U2 - 10.1002/aenm.202201652
DO - 10.1002/aenm.202201652
M3 - Article
AN - SCOPUS:85139145465
SN - 1614-6832
VL - 12
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 45
M1 - 2201652
ER -
