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von Aspern N, Diddens D, Kobayashi T, Börner M, Stubbmann-Kazakova O, Kozel V, Röschenthaler GV, Smiatek J, Winter M, Cekic-Laskovic I. Fluorinated Cyclic Phosphorus(III)-Based Electrolyte Additives for High Voltage Application in Lithium-Ion Batteries: Impact of Structure-Reactivity Relationships on CEI Formation and Cell Performance. ACS APPLIED MATERIALS & INTERFACES 2019; 11:16605-16618. [PMID: 30965002 DOI: 10.1021/acsami.9b03359] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two selected and designed fluorinated cyclic phosphorus(III)-based compounds, namely 2-(2,2,3,3,3-pentafluoropropoxy)-1,3,2-dioxaphospholane (PFPOEPi) and 2-(2,2,3,3,3-pentafluoro-propoxy)-4-(trifluormethyl)-1,3,2-dioxaphospholane (PFPOEPi-1CF3), were synthesized and comprehensively characterized for high voltage application in lithium-ion batteries (LIBs). Cyclic voltammetry (CV) and constant current cycling were conducted, followed by post mortem analysis of the NMC111 electrode surface via scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). To support and complement obtained experimental results, density functional theory (DFT) calculations and molecular dynamics (MD) simulations were performed. Theoretical and experimental findings show that the considered phospholane molecule class enables high voltage LIB application by sacrificial decomposition on the cathode surface and involvement in the formation of a cathode electrode interphase (CEI) via polymerization reaction. In addition, obtained results point out that the introduction of the CF3 group has a significant influence on the formation and dynamics of the CEI as well as on the overall cell performance, as the cell impedance as well as the thickness of the CEI is increased compared to the cells containing PFPOEPi, which results in a decreased cycling performance. This systematic approach allows researchers to understand the structure-reactivity relationship of the newly synthesized compounds and helps to further tailor the vital physicochemical properties of functional electrolyte additives relevant for high voltage LIB application.
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Affiliation(s)
- Natascha von Aspern
- Forschungszentrum Jülich GmbH Helmholtz-Institute Münster , Corrensstrasse 46 , 48149 Münster , Germany
| | - Diddo Diddens
- Forschungszentrum Jülich GmbH Helmholtz-Institute Münster , Corrensstrasse 46 , 48149 Münster , Germany
| | - Takeshi Kobayashi
- Institute for Computational Physics, University of Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
| | - Markus Börner
- MEET Battery Research Center , University of Münster , Corrensstraße 46 , 48149 Münster , Germany
| | - Olesya Stubbmann-Kazakova
- Department of Life Sciences and Chemistry , Jacobs University Bremen , Campus Ring 1 , 28759 Bremen , Germany
| | - Volodymyr Kozel
- Department of Life Sciences and Chemistry , Jacobs University Bremen , Campus Ring 1 , 28759 Bremen , Germany
| | - Gerd-Volker Röschenthaler
- Department of Life Sciences and Chemistry , Jacobs University Bremen , Campus Ring 1 , 28759 Bremen , Germany
| | - Jens Smiatek
- Forschungszentrum Jülich GmbH Helmholtz-Institute Münster , Corrensstrasse 46 , 48149 Münster , Germany
- Institute for Computational Physics, University of Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
| | - Martin Winter
- Forschungszentrum Jülich GmbH Helmholtz-Institute Münster , Corrensstrasse 46 , 48149 Münster , Germany
- MEET Battery Research Center , University of Münster , Corrensstraße 46 , 48149 Münster , Germany
| | - Isidora Cekic-Laskovic
- Forschungszentrum Jülich GmbH Helmholtz-Institute Münster , Corrensstrasse 46 , 48149 Münster , Germany
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