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| 100 | 1 | _ | |a Weiling, Matthias |0 P:(DE-Juel1)190810 |b 0 |
| 245 | _ | _ | |a Mechanistic Understanding of Additive Reductive Degradation and SEI Formation in High‐Voltage NMC811||SiO x ‐Containing Cells via Operando ATR‐FTIR Spectroscopy |
| 260 | _ | _ | |a Weinheim |c 2024 |b Wiley-VCH |
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| 520 | _ | _ | |a The implementation of silicon (Si)-containing negative electrodes is widely discussed as an approach to increase the specific capacity of lithium-ion batteries. However, challenges caused by severe volume changes and continuous (re-)formation of the solid-electrolyte interphase (SEI) on Si need to be overcome. The volume changes lead to electrolyte consumption and active lithium loss, decaying the cell performance and cycle life. Herein, the additive 2 sulfobenzoic acid anhydride (2 SBA) is utilized as an SEI-forming electrolyte additive for SiOx-containing anodes. The addition of 2 SBA to a state-of-the-art carbonate-based electrolyte in high-voltage NMC811||AG+20% SiOx pouch cells leads to improved electrochemical performance, resulting in a doubled cell cycle life. The origin of the enhanced cell performance is mechanistically investigated by developing an advanced experimental technique based on operando attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy. The operando ATR-FTIR spectroscopy results elucidate the degradation mechanism via anhydride ring-opening reactions after electrochemical reduction on the anode surface. Additionally, ion chromatography conductivity detection mass spectrometry, scanning electron microscopy, energy dispersive X-ray analysis, and quantum chemistry calculations are employed to further elucidate the working mechanisms of the additive and its degradation products. |
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| 536 | _ | _ | |a Elektrolytformulierungen für Lithiumbatterien der nächsten Generation mit großer Energiedichte und hoher Beständigkeit (13XP5129) |0 G:(BMBF)13XP5129 |c 13XP5129 |x 1 |
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| 700 | 1 | _ | |a Baghernejad, Masoud |0 0000-0002-2754-6623 |b 7 |e Corresponding author |
| 773 | _ | _ | |a 10.1002/aenm.202303568 |g p. 2303568 |0 PERI:(DE-600)2594556-7 |n 5 |p 2303568 |t Advanced energy materials |v 14 |y 2024 |x 1614-6832 |
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