4-Bromobenzyl isocyanate versus benzyl isocyanate—New film-forming electrolyte additives and overcharge protection additives for lithium ion batteries

Korepp, Christiane; Kern, Wolfgang; Lanzer, Eva; Raimann, Peter; Besenhard, Jürgen; Mo-hua, Yang; Möller, Kai-Christian; Shieh, Deng-Tswen; Winter, Martin

doi:10.1016/j.jpowsour.2007.06.142

Cited by 57 publications

(19 citation statements)

References 13 publications

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“…If ac ell is overcharged, this will lead to severe performance degradation and safety problems. [98] One approach to overcome this problem is the addition of redox shuttle additives,w hich limit the battery voltage through ar eversible redox process at the electrode/electrolyte interfaces in each cycle.H ereby,t he additive:i )oxidizes to ar adical cation at the cathode/electrolyte interface,i i) diffuses to the anode,i ii)reduces to the neutral additive at the anode/electrolyte interface,a nd iv) diffuses back to the cathode. [99] Introducing fluorine to redox shuttle molecules leads to the redox potential for the oxidation at the cathode to increase.…”

Section: The Role Of Fluorine In Redox Shuttle and Shutdown Additivesmentioning

confidence: 99%

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

et al. 2019

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Further enhancement in the energy densities of rechargeable lithium batteries calls for novel cell chemistry with advanced electrode materials that are compatible with suitable electrolytes without compromising the overall performance and safety, especially when considering high‐voltage applications. Significant advancements in cell chemistry based on traditional organic carbonate‐based electrolytes may be successfully achieved by introducing fluorine into the salt, solvent/cosolvent, or functional additive structure. The combination of the benefits from different constituents enables optimization of the electrolyte and battery chemistry toward specific, targeted applications. This Review aims to highlight key research activities and technical developments of fluorine‐based materials for aprotic non‐aqueous solvent‐based electrolytes and their components along with the related ongoing scientific challenges and limitations. Ionic liquid‐based electrolytes containing fluorine will not be considered in this Review.

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Section: The Role Of Fluorine In Redox Shuttle and Shutdown Additivesmentioning

confidence: 99%

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

et al. 2019

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“…Safety investigations of LIBs have been an important research topic from the beginning of LIB application [235,242,254]. Especially accelerated rate calorimetry (ARC) analyses of cells driven into thermal runaway benefit from a high amount of gases, which are formed in a hermetically closed environment.…”

Section: Origin Of the Gases Detector Referencesmentioning

confidence: 99%

Chromatographic Techniques in the Research Area of Lithium Ion Batteries: Current State-of-the-Art

et al. 2019

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Lithium ion batteries (LIBs) are widely used in numerous application areas, including portable consumer electronics, medicine, grid storage, electric vehicles and hybrid electric vehicles. One major challenge during operation and storage is the degradation of the cell constituents, which is called aging. This phenomenon drastically reduces both storage lifetime and cycle lifetime. Due to numerous aging effects, originating from both the individual LIB cell constituents as well as their interactions, a wide variety of instruments and methods are necessary for aging investigations. In particular, chromatographic methods are frequently applied for the analysis of the typically used liquid non-aqueous battery electrolytes based on organic solvents or ionic liquids. Moreover, chromatographic methods have also been recently used to investigate the composition of electrode materials. In this review, we will give an overview of the current state of chromatographic methods in the context of LIB cell research.

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“…Electrolyte additives are used up to 5%, either by weight or by volume [ 71 ]. Due to the application of additives, the electrolyte properties can be influenced: improvement of the flammability, enabling overcharge protection [ 71 , 72 , 73 ] or the SEI formation [ 25 , 74 , 75 , 76 , 77 , 78 ]. The SEI is formed during the first charge/discharge (formation cycles) of the LIB cell and is essential for safety and performance due to its protection of the electrolyte from further reductive decomposition at the anode surface [ 79 , 80 , 81 ].…”

Section: Lithium Ion Batteries Electrolytesmentioning

confidence: 99%

The Role of Sub- and Supercritical CO2 as “Processing Solvent” for the Recycling and Sample Preparation of Lithium Ion Battery Electrolytes

Nowak

Winter

2017

Molecules

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Quantitative electrolyte extraction from lithium ion batteries (LIB) is of great interest for recycling processes. Following the generally valid EU legal guidelines for the recycling of batteries, 50 wt % of a LIB cell has to be recovered, which cannot be achieved without the electrolyte; hence, the electrolyte represents a target component for the recycling of LIBs. Additionally, fluoride or fluorinated compounds, as inevitably present in LIB electrolytes, can hamper or even damage recycling processes in industry and have to be removed from the solid LIB parts, as well. Finally, extraction is a necessary tool for LIB electrolyte aging analysis as well as for post-mortem investigations in general, because a qualitative overview can already be achieved after a few minutes of extraction for well-aged, apparently “dry” LIB cells, where the electrolyte is deeply penetrated or even gellified in the solid battery materials.

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4-Bromobenzyl isocyanate versus benzyl isocyanate—New film-forming electrolyte additives and overcharge protection additives for lithium ion batteries

Cited by 57 publications

References 13 publications

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes

Chromatographic Techniques in the Research Area of Lithium Ion Batteries: Current State-of-the-Art

The Role of Sub- and Supercritical CO2 as “Processing Solvent” for the Recycling and Sample Preparation of Lithium Ion Battery Electrolytes

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