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Cited by 319

The DOI matches its Crossref record; 37 of the 37 references it cites were found in a registry or an index.

Investigations on the Fundamental Process of Cathode Electrolyte Interphase Formation and Evolution of High-Voltage Cathodes

Li, Qinghao, Wang, Yi, Wang, Xuelong, Sun, Xiaorui, Zhang, Jie-Nan, Yu, Xiqian, Li, Hong·2020·ACS Applied Materials & Interfaces

Abstract

Cathode electrolyte interphase (CEI) layer plays an essential role in determining the electrochemical performance of Li-ion batteries (LIBs), but the detailed mechanisms of CEI formation and evolution are not yet fully understood. With the pursuit of LIBs possessing a high energy density, fundamental investigations on the CEI have become increasingly important. Herein, X-ray photoelectron spectroscopy (XPS) is employed to fingerprint CEI formation and evolution on three of the most prevailing high-voltage cathodes including layered Li 1.144 Ni 0.136 Co 0.136 Mn 0.544 O 2 (LR-NCM), Li 2 Ru 0.5 Mn 0.5 O 3 (LRMO), and spinel LiNi 0.5 Mn 1.5 O 4 (LNMO). The influences of crystal structure, chemical constitution and cut-off voltage on CEI composition are clarified. Among these cathodes, the spinel cathode exhibits the most stable CEI layer throughout the battery cycle. While the layered cathodes based on the 4d transition metal Ru favor CEI formation upon contacting the electrolyte. Most importantly, anionic redox reaction (ARR) activation at high voltages is verified to dominate CEI evolution in subsequent cycles. The distinct CEI behaviors in diverse cathodes can be attributed to a series of entangled processes, including electrolyte/Li salt decomposition, CEI component dissociation and dissociated CEI species redeposition. Based on these findings, rational guidelines are provided for the interface design of high-voltage LIBs.

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Crossref · 10.1021/acsami.9b16727

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Metadata

Authors
Li, Q., Wang, Y., Wang, X., Sun, X., Zhang, J.-N., Yu, X., & Li, H.
Venue
ACS Applied Materials & Interfaces
Published
2019-12-24
Volume
12
Issue
2
Pages
2319-2326
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2997457117
Cited by
319
References
37
FWCI
9.43
Type
journal article
Language
en
Open access
closed

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