Paving Pathways Toward Long–Life Graphite/LiNi0.5Mn1.5O4 Full Cells: Electrochemical and Interphasial Points of View
Abstract
Abstract The high‐voltage spinel cathode LiNi 0.5 Mn 1.5 O 4 (LNMO) with no cobalt and low nickel content is promising for lithium‐ion batteries due to its high energy and power densities, good thermal stability, and low cost. However, its high operating voltage (≈4.7 V) results in a decomposition of the electrolyte, severe chemical crossover, and deterioration of electrode‐electrolyte interphases (EEIs), hindering its practical viability. It is demonstrated here that by electrochemically pre‐cycling the graphite in an electrolyte containing 30 wt.% fluoroethylene carbonate, a robust LiF‐rich artificial solid electrolyte interphase can be constructed for surface protection; on the other hand, an electrochemical pre‐lithiation of Fe‐doped LNMO serves as a lithium source for graphite at a full‐cell voltage of 2.6 V. As a result, the full cells with the as‐modified electrodes deliver a high capacity of 129 mA h g −1 with an excellent capacity retention of 93% after 200 cycles, vastly outperforming the full cells with fresh electrodes (120 mA h g −1 initial capacity with 78% retention). Finally, pathways toward long‐life graphite||LNMO full cells are pictured based on the inspirations from the electrochemical modifications and in‐depth analyses of the EEIs in this study.
- Authors:
-
- Univ. of Texas, Austin, TX (United States)
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); Welch Foundation; USDOE
- OSTI Identifier:
- 1969523
- Alternate Identifier(s):
- OSTI ID: 1885488
- Grant/Contract Number:
- EE0008442; F-1254; DE‐EE0008442
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 36; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Cui, Zehao, Zou, Feng, Celio, Hugo, and Manthiram, Arumugam. Paving Pathways Toward Long–Life Graphite/LiNi0.5Mn1.5O4 Full Cells: Electrochemical and Interphasial Points of View. United States: N. p., 2022.
Web. doi:10.1002/adfm.202203779.
Cui, Zehao, Zou, Feng, Celio, Hugo, & Manthiram, Arumugam. Paving Pathways Toward Long–Life Graphite/LiNi0.5Mn1.5O4 Full Cells: Electrochemical and Interphasial Points of View. United States. https://doi.org/10.1002/adfm.202203779
Cui, Zehao, Zou, Feng, Celio, Hugo, and Manthiram, Arumugam. Wed .
"Paving Pathways Toward Long–Life Graphite/LiNi0.5Mn1.5O4 Full Cells: Electrochemical and Interphasial Points of View". United States. https://doi.org/10.1002/adfm.202203779. https://www.osti.gov/servlets/purl/1969523.
@article{osti_1969523,
title = {Paving Pathways Toward Long–Life Graphite/LiNi0.5Mn1.5O4 Full Cells: Electrochemical and Interphasial Points of View},
author = {Cui, Zehao and Zou, Feng and Celio, Hugo and Manthiram, Arumugam},
abstractNote = {Abstract The high‐voltage spinel cathode LiNi 0.5 Mn 1.5 O 4 (LNMO) with no cobalt and low nickel content is promising for lithium‐ion batteries due to its high energy and power densities, good thermal stability, and low cost. However, its high operating voltage (≈4.7 V) results in a decomposition of the electrolyte, severe chemical crossover, and deterioration of electrode‐electrolyte interphases (EEIs), hindering its practical viability. It is demonstrated here that by electrochemically pre‐cycling the graphite in an electrolyte containing 30 wt.% fluoroethylene carbonate, a robust LiF‐rich artificial solid electrolyte interphase can be constructed for surface protection; on the other hand, an electrochemical pre‐lithiation of Fe‐doped LNMO serves as a lithium source for graphite at a full‐cell voltage of 2.6 V. As a result, the full cells with the as‐modified electrodes deliver a high capacity of 129 mA h g −1 with an excellent capacity retention of 93% after 200 cycles, vastly outperforming the full cells with fresh electrodes (120 mA h g −1 initial capacity with 78% retention). Finally, pathways toward long‐life graphite||LNMO full cells are pictured based on the inspirations from the electrochemical modifications and in‐depth analyses of the EEIs in this study.},
doi = {10.1002/adfm.202203779},
journal = {Advanced Functional Materials},
number = 36,
volume = 32,
place = {United States},
year = {Wed Jun 29 00:00:00 EDT 2022},
month = {Wed Jun 29 00:00:00 EDT 2022}
}
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