TY - JOUR
T1 - Cyclic-induced deformation and the degradation of Al-doped LLZO electrolytes in all-solid-state Li-metal batteries
AU - Adjah, John
AU - Orisekeh, Kingsley I.
AU - Ahmed, Ridwan A.
AU - Vandadi, Mobin
AU - Agyei-Tuffour, Benjamin
AU - Dodoo-Arhin, David
AU - Nyankson, Emmanuel
AU - Asare, Joseph
AU - Rahbar, Nima
AU - Soboyejo, Winston O.
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2024/2/28
Y1 - 2024/2/28
N2 - This paper presents the results of a study of the mechanical degradation of Li-oxide garnet solid electrolyte, Li7La3Zr2O12 (LLZO) in all-solid-state lithium metal batteries. A coupled thermo-electro-chemo-mechanical model was used to analyze stress-strain distribution and cracking phenomena within the electrolyte. A combination of in-situ/ex-situ microscopic observations, strain mapping and finite element modeling were deployed to study the progressive deformation and cracking phenomena that occur as a result of electrochemical charging and discharging, thermal runaway, and joule heating phenomenon. The results show that strains induced during discharge cycles are more significant than those induced during charging phase. The accumulation of strains during charging and discharging is also shown to result ultimately in cracking that impedes Li ion transport, while accelerated electro-chemical degradation. The implications of these processes are discussed for the development of robust and durable all-solid-state batteries.
AB - This paper presents the results of a study of the mechanical degradation of Li-oxide garnet solid electrolyte, Li7La3Zr2O12 (LLZO) in all-solid-state lithium metal batteries. A coupled thermo-electro-chemo-mechanical model was used to analyze stress-strain distribution and cracking phenomena within the electrolyte. A combination of in-situ/ex-situ microscopic observations, strain mapping and finite element modeling were deployed to study the progressive deformation and cracking phenomena that occur as a result of electrochemical charging and discharging, thermal runaway, and joule heating phenomenon. The results show that strains induced during discharge cycles are more significant than those induced during charging phase. The accumulation of strains during charging and discharging is also shown to result ultimately in cracking that impedes Li ion transport, while accelerated electro-chemical degradation. The implications of these processes are discussed for the development of robust and durable all-solid-state batteries.
KW - Al-doped LLZO
KW - All-solid-state Li-Ion batteries
KW - Charge-discharge cycles
KW - Electrochemical degradation
KW - Impedance
KW - Ionic conductivity
KW - Stress/strain state
UR - http://www.scopus.com/inward/record.url?scp=85181169357&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2023.234022
DO - 10.1016/j.jpowsour.2023.234022
M3 - Article
AN - SCOPUS:85181169357
SN - 0378-7753
VL - 594
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 234022
ER -