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A Long‐Life Lithium Ion Battery with Enhanced Electrode/Electrolyte Interface by Using an Ionic Liquid Solution
Author(s) -
Elia Giuseppe Antonio,
Ulissi Ulderico,
Mueller Franziska,
Reiter Jakub,
Tsiouvaras Nikolaos,
Sun YangKook,
Scrosati Bruno,
Passerini Stefano,
Hassoun Jusef
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201505192
Subject(s) - electrolyte , anode , materials science , cathode , electrochemistry , ionic liquid , electrode , chemical engineering , ionic conductivity , dielectric spectroscopy , electrochemical window , lithium (medication) , lithium ion battery , half cell , battery (electricity) , chemistry , working electrode , organic chemistry , catalysis , engineering , medicine , power (physics) , physics , quantum mechanics , endocrinology
In this paper, we report an advanced long‐life lithium ion battery, employing a Pyr 14 TFSI‐LiTFSI non‐flammable ionic liquid (IL) electrolyte, a nanostructured tin carbon (Sn‐C) nanocomposite anode, and a layered LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NMC) cathode. The IL‐based electrolyte is characterized in terms of conductivity and viscosity at various temperatures, revealing a Vogel–Tammann–Fulcher (VTF) trend. Lithium half‐cells employing the Sn‐C anode and NMC cathode in the Pyr 14 TFSI‐LiTFSI electrolyte are investigated by galvanostatic cycling at various temperatures, demonstrating the full compatibility of the electrolyte with the selected electrode materials. The NMC and Sn‐C electrodes are combined into a cathode‐limited full cell, which is subjected to prolonged cycling at 40 °C, revealing a very stable capacity of about 140 mAh g −1 and retention above 99 % over 400 cycles. The electrode/electrolyte interface is further characterized through a combination of electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) investigations upon cell cycling. The remarkable performances reported here definitively indicate that IL‐based lithium ion cells are suitable batteries for application in electric vehicles.