Enhancement of surface stability of lithium manganese oxide spinel by silyl-group functionalized fluoride-responsive ionic liquid additives

Seo, Hyoree; Na, Subin; Lee, Boeun; Yim, Taeeun; Oh, Si Hyoung

doi:10.1016/j.jiec.2018.03.029

Cited by 4 publications

(1 citation statement)

References 54 publications

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“…In addition, the presence of trace water and hydrogen fluoride (HF) is undesirable as HF in the electrolyte can lead to instability of the electrode–electrolyte interphase. To address this issue and enhance the long-term cycle performance of the batteries, researchers have proposed the use of additives to scavenge HF, such as 3-(trimethylsilyl)2-oxazolidinone, (trimethylsilyl)isothiocyanate, and fluorideresponsive ionic liquid additives . All of these additives contain the trimethylsilyl (TMS) group, which has a high affinity for HF, thereby stabilizing the interface between the electrode and electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Solid Electrolyte Interface Film-Forming and Surface-Stabilizing Bifunctional 1,2-Bis((trimethylsilyl)oxy) Benzene as Novel Electrolyte Additive for Silicon-Based Lithium-Ion Batteries

Cheng,

Li,

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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The application of Si-based anodes in lithium-ion batteries (LIBs) has garnered significant attention due to their high theoretical specific capacity yet is still challenged by the substantial volume expansion of silicon particles during the lithiation process, resulting in the instability of the electrode–electrolyte interphase and deteriorative battery performance. Herein, an ortho(trimethylsilyl)oxybenzene electrolyte additive, 1,2-bis((trimethylsilyl)oxy) benzene (referred to as BTMSB), has been investigated as a bifunctional electrolyte additive for Si-based LIBs. The BTMSB can form a uniform and robust LiF-rich solid electrolyte interphase (SEI) on the surface of Si-based material particles, adapting the huge volume expansion of the Si-based electrode and facilitating lithium-ion transport. Additionally, the BTMSB demonstrates the ability to scavenge hydrofluoric acid (HF) to stabilize the electrode–electrolyte interphase. The SiO x /C∥Li batteries with 2% BTMSB exhibit improved cycle performance and current–rate capabilities, of which the capacity retention retains 69% after 400 cycles. Furthermore, Si-based anode cells with higher theoretical specific capacities (1C = 550 mAh g–1) and NCM523∥SiO x /C pouch cells are constructed and evaluated, displaying superior cycle performance. This work provides valuable insights for the development of effective electrolyte additives and the commercialization of high energy density LIBs with Si-based anodes.

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Section: Introductionmentioning

confidence: 99%