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Title: Evaluating electrolyte additives for lithium-ion cells: A new Figure of Merit approach

Electrolyte additives are known to improve the performance of lithium-ion cells. In this work we examine the performance of Li 1.03Ni 0.5Mn 0.3Co 0.3O 2-graphite (NMC532/Gr) cells containing combinations of lithium bis(oxalate)borate (LiBOB), vinylene carbonate (VC), trivinylcyclotriboroxane (tVCBO), prop-1-ene-1,3-sultone (PES), phenyl boronic acid ethylene glycol ester (PBE), tris(trimethylsilyl) phosphite (TMSPi), triethylphosphite (TEPi), and lithium difluoro(oxalate)borate (LiDFOB) added to our baseline (1.2M LiPF 6 in EC:EMC, 3:7 w/w) electrolyte. In order to rank performance of the various electrolytes, we developed two separate figures of merit (FOM), which are based on the energy retention and power retention of the cells. Using these two metrics in conjunction, we show that only one of the fifteen electrolyte formulations tested significantly outperforms the baseline electrolyte: this electrolyte contains the 0.25 wt% tVCBO + 1 wt% TMSPi additive mix. Little correlation was observed between the FOMs for energy retention and power retention, which indicates that the mechanisms that govern these performance parameters are likely independent of each other. In conclusion, our FOM approach has general applicability and can be used to develop electrolyte and electrode formulations that prolong the life of lithium-ion batteries.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 365; Journal Issue: C; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; capacity fade; energy density; impedance rise; lithium-ion; power density
OSTI Identifier:
1393196

Tornheim, Adam, Peebles, Cameron, Gilbert, James A., Sahore, Ritu, Garcia, Juan C., Bareno, Javier, Iddir, Hakim, Liao, Chen, and Abraham, Daniel P.. Evaluating electrolyte additives for lithium-ion cells: A new Figure of Merit approach. United States: N. p., Web. doi:10.1016/j.jpowsour.2017.08.093.
Tornheim, Adam, Peebles, Cameron, Gilbert, James A., Sahore, Ritu, Garcia, Juan C., Bareno, Javier, Iddir, Hakim, Liao, Chen, & Abraham, Daniel P.. Evaluating electrolyte additives for lithium-ion cells: A new Figure of Merit approach. United States. doi:10.1016/j.jpowsour.2017.08.093.
Tornheim, Adam, Peebles, Cameron, Gilbert, James A., Sahore, Ritu, Garcia, Juan C., Bareno, Javier, Iddir, Hakim, Liao, Chen, and Abraham, Daniel P.. 2017. "Evaluating electrolyte additives for lithium-ion cells: A new Figure of Merit approach". United States. doi:10.1016/j.jpowsour.2017.08.093. https://www.osti.gov/servlets/purl/1393196.
@article{osti_1393196,
title = {Evaluating electrolyte additives for lithium-ion cells: A new Figure of Merit approach},
author = {Tornheim, Adam and Peebles, Cameron and Gilbert, James A. and Sahore, Ritu and Garcia, Juan C. and Bareno, Javier and Iddir, Hakim and Liao, Chen and Abraham, Daniel P.},
abstractNote = {Electrolyte additives are known to improve the performance of lithium-ion cells. In this work we examine the performance of Li1.03Ni0.5Mn0.3Co0.3O2-graphite (NMC532/Gr) cells containing combinations of lithium bis(oxalate)borate (LiBOB), vinylene carbonate (VC), trivinylcyclotriboroxane (tVCBO), prop-1-ene-1,3-sultone (PES), phenyl boronic acid ethylene glycol ester (PBE), tris(trimethylsilyl) phosphite (TMSPi), triethylphosphite (TEPi), and lithium difluoro(oxalate)borate (LiDFOB) added to our baseline (1.2M LiPF6 in EC:EMC, 3:7 w/w) electrolyte. In order to rank performance of the various electrolytes, we developed two separate figures of merit (FOM), which are based on the energy retention and power retention of the cells. Using these two metrics in conjunction, we show that only one of the fifteen electrolyte formulations tested significantly outperforms the baseline electrolyte: this electrolyte contains the 0.25 wt% tVCBO + 1 wt% TMSPi additive mix. Little correlation was observed between the FOMs for energy retention and power retention, which indicates that the mechanisms that govern these performance parameters are likely independent of each other. In conclusion, our FOM approach has general applicability and can be used to develop electrolyte and electrode formulations that prolong the life of lithium-ion batteries.},
doi = {10.1016/j.jpowsour.2017.08.093},
journal = {Journal of Power Sources},
number = C,
volume = 365,
place = {United States},
year = {2017},
month = {9}
}