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A Lithium‐Ion Battery with Enhanced Safety Prepared using an Environmentally Friendly Process
Author(s) -
Mueller Franziska,
Loeffler Nicholas,
Kim GukTae,
Diemant Thomas,
Behm R. Jürgen,
Passerini Stefano
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600296
Subject(s) - electrolyte , ethylene carbonate , dimethyl carbonate , inorganic chemistry , diethyl carbonate , anode , ionic liquid , materials science , lithium (medication) , lithium ion battery , chemistry , chemical engineering , battery (electricity) , electrode , methanol , organic chemistry , catalysis , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
A new lithium‐ion battery chemistry is presented based on a conversion–alloying anode material, a carbon‐coated Fe‐doped ZnO (TMO‐C), and a LiNi 1/3 Mn 1/3 Co 1/3 O 2 (NMC) cathode. Both electrodes were fabricated using an environmentally friendly cellulose‐based binding agent. The performance of the new lithium‐ion battery was evaluated with a conventional, carbonate‐based electrolyte (ethylene carbonate:diethyl carbonate–1 m lithium hexafluorophosphate, EC:DEC 1 m LiPF 6 ) and an ionic liquid (IL)‐based electrolyte ( N ‐butyl‐ N ‐methylpyrrolidinium bis(trifluoromethanesulfonyl)imide–0.2 m lithium bis(trifluoromethanesulfonyl)imide, Pyr 14 TFSI 0.2 m LiTFSI), respectively. Galvanostatic charge/discharge tests revealed a reduced rate capability of the TMO‐C/Pyr 14 TFSI 0.2 m LiTFSI/NMC full‐cell compared to the organic electrolyte, but the coulombic efficiency was significantly enhanced. Moreover, the IL‐based electrolyte substantially improves the safety of the system due to a higher thermal stability of the formed anodic solid electrolyte interphase and the IL electrolyte itself. While the carbonate‐based electrolyte shows sudden degradation reactions, the IL exhibits a slowly increasing heat flow, which does not constitute a serious safety risk.