TY - JOUR
T1 - Lithiophilic interlayer driven ‘bottom-up’ metal infilling in high current density Li-metal anodes
AU - Abdul Ahad, Syed
AU - Drews, Janina
AU - Danner, Timo
AU - Latz, Arnulf
AU - Geaney, Hugh
N1 - Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024/4/23
Y1 - 2024/4/23
N2 - Lithium (Li) metal holds great potential for pushing practical energy densities beyond state-of the art Li-ion batteries. However, parasitic problems including Li dendrite formation can result in separator piercing, subsequent short-circuit and ultimately thermal runaway. Here we propose an innovative interlayer strategy that is guided by continuum simulations in 1D and 3D, which shows that materials with low Li nucleation overpotentials and high surface areas can enable spatially controlled plating of Li. This insight inspires an interlayer consisting of highly lithiophilic germanium nanowires (Ge NWs) coated on one side of a carbon cloth (CC). This anode geometry effectively unlocks Li infilling by a “bottom-up” motif during stripping/plating cycles. As a result, dendrite formation is eliminated, with the GeCC interlayer acting as a controlling Li reservoir during stripping/plating cycles. Ultra-stable symmetric cell performance up to 2500 h was achieved, with low overpotentials at high current density (2 mA cm−2) and plating capacity (2 mA h cm−2). Furthermore, aggressive higher current density (4 mA cm−2) and plating capacity (4 mA h cm−2) conditions were enabled by this approach. The high performing GeCC interlayer modified Li metal anodes were tested with LiFePO4 and NMC cathodes, facilitating greatly enhanced cyclic stability compared to control cells.
AB - Lithium (Li) metal holds great potential for pushing practical energy densities beyond state-of the art Li-ion batteries. However, parasitic problems including Li dendrite formation can result in separator piercing, subsequent short-circuit and ultimately thermal runaway. Here we propose an innovative interlayer strategy that is guided by continuum simulations in 1D and 3D, which shows that materials with low Li nucleation overpotentials and high surface areas can enable spatially controlled plating of Li. This insight inspires an interlayer consisting of highly lithiophilic germanium nanowires (Ge NWs) coated on one side of a carbon cloth (CC). This anode geometry effectively unlocks Li infilling by a “bottom-up” motif during stripping/plating cycles. As a result, dendrite formation is eliminated, with the GeCC interlayer acting as a controlling Li reservoir during stripping/plating cycles. Ultra-stable symmetric cell performance up to 2500 h was achieved, with low overpotentials at high current density (2 mA cm−2) and plating capacity (2 mA h cm−2). Furthermore, aggressive higher current density (4 mA cm−2) and plating capacity (4 mA h cm−2) conditions were enabled by this approach. The high performing GeCC interlayer modified Li metal anodes were tested with LiFePO4 and NMC cathodes, facilitating greatly enhanced cyclic stability compared to control cells.
UR - http://www.scopus.com/inward/record.url?scp=85191853331&partnerID=8YFLogxK
U2 - 10.1039/d4ta01072h
DO - 10.1039/d4ta01072h
M3 - Article
AN - SCOPUS:85191853331
SN - 2050-7488
VL - 12
SP - 12250
EP - 12261
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 20
ER -