Synthesis and evaluation of a novel pyrrolidinium-based zwitterionic additive with an ether side chain for ionic liquid electrolytes in high-voltage lithium-ion batteries

TY - JOUR

T1 - Synthesis and evaluation of a novel pyrrolidinium-based zwitterionic additive with an ether side chain for ionic liquid electrolytes in high-voltage lithium-ion batteries

AU - Horiuchi, Shunsuke

AU - Zhu, Haijin

AU - Forsyth, Maria

AU - Takeoka, Yuko

AU - Rikukawa, Masahiro

AU - Yoshizawa-Fujita, Masahiro

N1 - Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/7/1

Y1 - 2017/7/1

N2 - Ionic liquids (ILs) containing zwitterions were studied as electrolytes for lithium-ion batteries. The effect of a pyrrolidinium zwitterion with a long ether side chain on the thermal and electrochemical properties of an IL and the charge/discharge properties of Li/LiCoO2, Li/LiNi1/3Mn1/3Co1/3O2 (NMC), and graphite/Li cells with IL/zwitterion electrolytes was investigated. The melting temperature of the IL-based electrolyte composed of N-methyl-N-methoxymethylpyrrolidinium bis(fluorosulfonyl)amide ([Pyr1,1O1][FSA]) and lithium bis(fluorosulfonyl)amide (LiFSA) with 3-(1-(2-(2-methoxyethoxy)ethyl)pyrrolidin-1-ium-1-yl)propane-1-sulfonate (OE2pyps) as the zwitterionic additive was about −18 °C. The electrochemical window of [Pyr1,1O1][FSA]/LiFSA/OE2pyps was over 5 V vs. Li/Li+. Li|electrolyte|LiCoO2 cells containing the [Pyr1,1O1][FSA]/LiFSA/OE2pyps electrolyte system exhibited high capacity values in the cut-off voltage range of 3.0–4.3 V, even after 50 cycles. Moreover, increases of interfacial resistance between the electrolyte and cathode during cycling were suppressed. Li|electrolyte|NMC cells containing this electrolyte system also exhibited high capacities in a wide cut-off voltage range of 3.0–4.6 V, even after 50 cycles. In the cyclic voltammograms of cells employing a graphite electrode, the intercalation/deintercalation of lithium ions was observed between 0 and + 0.4 V vs. Li/Li+. Further, graphite|electrolyte|Li cells containing [Pyr1,1O1][FSA]/LiFSA/OE2pyps exhibited stable charge/discharge cycle behavior over 5 cycles.

AB - Ionic liquids (ILs) containing zwitterions were studied as electrolytes for lithium-ion batteries. The effect of a pyrrolidinium zwitterion with a long ether side chain on the thermal and electrochemical properties of an IL and the charge/discharge properties of Li/LiCoO2, Li/LiNi1/3Mn1/3Co1/3O2 (NMC), and graphite/Li cells with IL/zwitterion electrolytes was investigated. The melting temperature of the IL-based electrolyte composed of N-methyl-N-methoxymethylpyrrolidinium bis(fluorosulfonyl)amide ([Pyr1,1O1][FSA]) and lithium bis(fluorosulfonyl)amide (LiFSA) with 3-(1-(2-(2-methoxyethoxy)ethyl)pyrrolidin-1-ium-1-yl)propane-1-sulfonate (OE2pyps) as the zwitterionic additive was about −18 °C. The electrochemical window of [Pyr1,1O1][FSA]/LiFSA/OE2pyps was over 5 V vs. Li/Li+. Li|electrolyte|LiCoO2 cells containing the [Pyr1,1O1][FSA]/LiFSA/OE2pyps electrolyte system exhibited high capacity values in the cut-off voltage range of 3.0–4.3 V, even after 50 cycles. Moreover, increases of interfacial resistance between the electrolyte and cathode during cycling were suppressed. Li|electrolyte|NMC cells containing this electrolyte system also exhibited high capacities in a wide cut-off voltage range of 3.0–4.6 V, even after 50 cycles. In the cyclic voltammograms of cells employing a graphite electrode, the intercalation/deintercalation of lithium ions was observed between 0 and + 0.4 V vs. Li/Li+. Further, graphite|electrolyte|Li cells containing [Pyr1,1O1][FSA]/LiFSA/OE2pyps exhibited stable charge/discharge cycle behavior over 5 cycles.

KW - Bis(fluorosulfonyl)amide

KW - Ether group

KW - Ionic liquid

KW - Lithium-ion battery

KW - Pyrrolidinium

KW - Zwitterion

UR - http://www.scopus.com/inward/record.url?scp=85018250756&partnerID=8YFLogxK

U2 - 10.1016/j.electacta.2017.04.165

DO - 10.1016/j.electacta.2017.04.165

M3 - 文章

AN - SCOPUS:85018250756

SN - 0013-4686

VL - 241

SP - 272

EP - 280

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -