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Title: Understanding the trilemma of fast charging, energy density and cycle life of lithium-ion batteries

Abstract

Increasing energy density of Li-ion batteries (LiBs) along with fast charging capability are two key approaches to eliminate range anxiety and boost mainstream adoption of electric vehicles (EVs). Either the increase of energy density or of charge rate, however, heightens the risk of lithium plating and thus deteriorates cell life. The trilemma of fast charging, energy density and cycle life are studied systematically in this work utilizing a physics-based aging model with incorporation of both lithium plating and solid-electrolyte-interphase (SEI) growth. The model is able to capture the key feature of temperature-dependent aging behavior of LiBs, or more specifically, the existence of an optimal temperature with the longest cycle life. We demonstrate that this optimal temperature is a result of competition between SEI growth and lithium plating. Further, it is revealed that either the increase of charge rate or of energy density accelerates lithium plating induced aging. As such, the optimal temperature for cell life increases from ~20 °C for a high-power cell at 1C charge to ~35–45 °C with the increase of charge rate and/or energy density. In conclusion, it would be beneficial to further increase the charge temperature in order to enable robust fast charging of high energymore » EV cells.« less

Authors:
ORCiD logo [1];  [1]
  1. The Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1474853
Grant/Contract Number:  
EE0008355
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 402; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Lithium-ion battery; Fast charging; Energy density; Cycle life; Lithium plating; Temperature-dependent aging

Citation Formats

Yang, Xiao -Guang, and Wang, Chao -Yang. Understanding the trilemma of fast charging, energy density and cycle life of lithium-ion batteries. United States: N. p., 2018. Web. doi:10.1016/j.jpowsour.2018.09.069.
Yang, Xiao -Guang, & Wang, Chao -Yang. Understanding the trilemma of fast charging, energy density and cycle life of lithium-ion batteries. United States. doi:10.1016/j.jpowsour.2018.09.069.
Yang, Xiao -Guang, and Wang, Chao -Yang. Thu . "Understanding the trilemma of fast charging, energy density and cycle life of lithium-ion batteries". United States. doi:10.1016/j.jpowsour.2018.09.069. https://www.osti.gov/servlets/purl/1474853.
@article{osti_1474853,
title = {Understanding the trilemma of fast charging, energy density and cycle life of lithium-ion batteries},
author = {Yang, Xiao -Guang and Wang, Chao -Yang},
abstractNote = {Increasing energy density of Li-ion batteries (LiBs) along with fast charging capability are two key approaches to eliminate range anxiety and boost mainstream adoption of electric vehicles (EVs). Either the increase of energy density or of charge rate, however, heightens the risk of lithium plating and thus deteriorates cell life. The trilemma of fast charging, energy density and cycle life are studied systematically in this work utilizing a physics-based aging model with incorporation of both lithium plating and solid-electrolyte-interphase (SEI) growth. The model is able to capture the key feature of temperature-dependent aging behavior of LiBs, or more specifically, the existence of an optimal temperature with the longest cycle life. We demonstrate that this optimal temperature is a result of competition between SEI growth and lithium plating. Further, it is revealed that either the increase of charge rate or of energy density accelerates lithium plating induced aging. As such, the optimal temperature for cell life increases from ~20 °C for a high-power cell at 1C charge to ~35–45 °C with the increase of charge rate and/or energy density. In conclusion, it would be beneficial to further increase the charge temperature in order to enable robust fast charging of high energy EV cells.},
doi = {10.1016/j.jpowsour.2018.09.069},
journal = {Journal of Power Sources},
number = C,
volume = 402,
place = {United States},
year = {2018},
month = {9}
}

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