Role of Lithium Salt on Solid Electrolyte Interface (SEI) Formation and Structure in Lithium Ion Batteries

By Mengyun Nie, B. Lucht. 2014

228 citations recorded by the source corpus.

A comparative investigation of the different lithium salts on formation of the solid electrolyte interface (SEI) on binder free graphite anodes for lithium ion batteries has been conducted. The electrolytes investigated include 1 M LiPF6, LiBF4, LiTFSI, LiFSI, LiDFOB or LiBOB dissolved in ethylene carbonate (EC). The SEI has been investigated via a combination of spectroscopic and microscopic techniques. Transmission electron microscopy (TEM) allows direct observation of the SEI formed from the different electrolytes. Nuclear magnetic resonance (NMR) spectroscopy of D2O extracts are utilized to characterize the soluble species of SEI. XPS and FTIR provide additional elemental and functional group information for the SEI components. The SEI for all electrolytes contains lithium ethylene dicarbonate (LEDC), the primary reduction product of EC. In addition, the SEI for all electrolytes contain LiF except for the SEI generated from the LiBOB electrolyte. The SEI generated in the presence of LiBOB or LiDFOB electrolytes contain multiple oxalate containing species, including lithium oxalate (Li2C2O4), and borates. © 2014 The Electrochemical Society. [DOI: 10.1149/2.054406jes] All rights reserved.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1cb40f7f6ca5042c0cb2670231a588bc61fcac28

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In Automotive Engineering

1. Jianlin Li
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Citations in the corpus

• The state of understanding of the lithium-ion-battery graphite solid electrolyte interphase (SEI) and its relationship to formation cycling (2016, result): “In recent studies, the SEI structure shows a bilayer structure in general, but in reality is more complicated.[51-54] For example, according to the results of Takenaka’s hybrid Monte Carlo (MC)/molecular dynamics (MD) reaction simulation, inorganic salts such as Li2CO3 are abundant near the anode su”
• Reduction Reactions of Electrolyte Salts for Lithium Ion Batteries: LiPF6, LiBF4, LiDFOB, LiBOB, and LiTFSI (2018, unknown): “20,21 Synthesis of initial SEI components from carbonate solvents in high yield through reduction of the solvents with lithium naphthalenide has been reported.”