Lithium Ion Battery Graphite Solid Electrolyte Interphase Revealed by Microscopy and Spectroscopy

By Mengyun Nie, D. Chalasani, D. Abraham, Yanjing Chen, Arijit Bose, B. Lucht. 2013

458 citations recorded by the source corpus.

The surface reactions of electrolytes with the graphitic anode of lithium ion batteries have been investigated. The investigation utilizes two novel techniques, which are enabled by the use of binder-free graphite anodes. The first method, transmission electron microscopy (TEM) with energy dispersive X-ray spectroscopy, allows straightforward analysis of the graphite solid electrolyte interphase (SEI). The second method utilizes multi-nuclear magnetic resonance (NMR) spectroscopy of D2O extracts from the cycled anodes. The TEM and NMR data are complemented by XPS and FTIR data, which are routinely used for SEI studies. Cells were cycled with LiPF6 and ethylene carbonate (EC), ethyl methyl carbonate (EMC), and EC/EMC blends. This unique combination of techniques establishes that for EC/LiPF6 electrolytes, the graphite SEI is ∼50 nm thick after the first full lithiation cycle, and predominantly contains lithium ethylene dicarbonate (LEDC) and LiF. In cells containing EMC/LiPF6 electrolytes, the graphite SEI...

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1adddbdee744d5f77af2f031715c7d9931020afe

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In Automotive Engineering

1. Yanfeng Ma
2. Yi Huang

In Electrical and Electronic Engineering

1. Yi Huang
2. Long Zhang
3. Xi Yang
4. Fan Zhang
5. Yanfeng Ma
6. Tengfei Zhang
7. Yanhong Lu

Citations in the corpus

• High energy density Li-ion capacitor assembled with all graphene-based electrodes (2015, background): “[2] Nie M, Chalasani D, Abraham DP, Chen Y, Bose A, Lucht BL.”
• Review on modeling of the anode solid electrolyte interphase (SEI) for lithium-ion batteries (2018, unknown): “This especially contributes to the electrochemical instability of the outer organic SEI components, such as Li2EDC and other radicals.(158,167,194) According to the first-principles calculation, Soto et al.”