TY - JOUR
T1 - Asymmetric Temperature Modulation for Extreme Fast Charging of Lithium-Ion Batteries
AU - Yang, Xiao Guang
AU - Liu, Teng
AU - Gao, Yue
AU - Ge, Shanhai
AU - Leng, Yongjun
AU - Wang, Donghai
AU - Wang, Chao Yang
N1 - Funding Information:
Financial support from the US Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under award number DE-EE0008355 is gratefully acknowledged.
Funding Information:
Financial support from the US Department of Energy's Office of Energy Efficiency and Renewable Energy (EERE) under award number DE-EE0008355 is gratefully acknowledged. X.-G.Y. and C.-Y.W. conceived the idea and wrote the manuscript. X.-G.Y. and T.L. designed and carried out the extreme fast charging experiments. Y.G. and D.W. performed SEM and XPS experiments. S.G. and Y.L. performed cycle test of baseline cells. X.-G.Y. and T.L. contributed equally to this work. The authors declare no competing interests.
Publisher Copyright:
© 2019 Elsevier Inc.
PY - 2019/12/18
Y1 - 2019/12/18
N2 - Adding a 200-mile range in 10 min, so-called extreme fast charging (XFC), is the key to mainstream adoption of battery electric vehicles (BEVs). Here, we present an asymmetric temperature modulation (ATM) method that, on one hand, charges a Li-ion cell at an elevated temperature of 60°C to eliminate Li plating and, on the other, limits the exposure time at 60°C to only ∼10 min per cycle, or 0.1% of the lifetime of a BEV, to prevent severe solid-electrolyte-interphase growth. The asymmetric temperature between charge and discharge opens a new path to enhance kinetics and transport during charging while still achieving long life. We show that a 9.5-Ah 170-Wh/kg cell sustained 1,700 XFC cycles (6 C charge to 80% state of charge) at 20% capacity loss with the ATM, compared to 60 cycles for a control cell, and that a 209-Wh/kg BEV cell retained 91.7% capacity after 2,500 XFC cycles.
AB - Adding a 200-mile range in 10 min, so-called extreme fast charging (XFC), is the key to mainstream adoption of battery electric vehicles (BEVs). Here, we present an asymmetric temperature modulation (ATM) method that, on one hand, charges a Li-ion cell at an elevated temperature of 60°C to eliminate Li plating and, on the other, limits the exposure time at 60°C to only ∼10 min per cycle, or 0.1% of the lifetime of a BEV, to prevent severe solid-electrolyte-interphase growth. The asymmetric temperature between charge and discharge opens a new path to enhance kinetics and transport during charging while still achieving long life. We show that a 9.5-Ah 170-Wh/kg cell sustained 1,700 XFC cycles (6 C charge to 80% state of charge) at 20% capacity loss with the ATM, compared to 60 cycles for a control cell, and that a 209-Wh/kg BEV cell retained 91.7% capacity after 2,500 XFC cycles.
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U2 - 10.1016/j.joule.2019.09.021
DO - 10.1016/j.joule.2019.09.021
M3 - Article
SN - 2542-4351
VL - 3
SP - 3002
EP - 3019
JO - Joule
JF - Joule
IS - 12
ER -
