Effects of functional electrolyte additives for Li-ion batteries

Shim, Eun-Gi; Nam, Tae-Heum; Kim, Jung-Gu; Kim, Hyunsoo; Moon, Seong‐In

doi:10.1016/j.jpowsour.2007.04.089

Cited by 66 publications

(43 citation statements)

References 20 publications

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“…The beneficial effect of VC was previously demonstrated, even though only a few chemical studies have to date considered the involvement of VC in electrochemical processes. [8,[17][18][19][20] Similarly, the XPS technique allowed us to identify the chemical species present on discharged electrodes and hence to elucidate the role of each component (metal and electrolyte) in the electrochemical reaction.…”

Section: Resultsmentioning

confidence: 99%

Elucidating the Beneficial Effect of Vinylene Carbonate on the Electrochemistry of Antimony Electrodes in Lithium Batteries

Martı́n¹,

Morales²,

Sánchez³

2008

ChemPhysChem

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Vinylene carbonate (VC) is an effective electrolyte additive for improving electrode performance in lithium-ion batteries. We confirm its beneficial effects in a nanosized Sb-cellulose fiber composite electrode and examine its mechanism of action by X-ray photoelectron spectroscopy, the most suitable technique for characterizing active particle surfaces (especially electrode/electrolyte interfaces). Vinylene carbonate clearly increases electrolyte stability (particularly that of LiPF(6)) by avoiding the formation of a thick layer of LiF that conceals Sb and prevents its reaction with Li. Decreasing the layer thickness therefore increases the reversibility of the electrochemical reaction and improves capacity retention on cycling. The presence of VC afforded high-quality Sb 4d and Li 1s photoemissions, fitting of which clearly exposed a previously unreported low-energy component. We believe that this component is an Li(x)Sb alloy, which for the first time is identified spectroscopically.

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Section: Resultsmentioning

confidence: 99%

Elucidating the Beneficial Effect of Vinylene Carbonate on the Electrochemistry of Antimony Electrodes in Lithium Batteries

Martı́n¹,

Morales²,

Sánchez³

2008

ChemPhysChem

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“…124,125,126,127,128 Work by Aurbach et al 129 showed that VC polymerizes on the lithiated graphite surfaces, forming poly alkyl Li-carbonate species that suppress both solvent and salt anion reduction. Shima et al 130 have shown increased thermal stability of electrolytes with this additive while Ota et al 121 showed enhanced thermal stability of the VC-derived SEI coating on the exposed anode surfaces. It has also been shown that adding a few weight-percent of VEC to PC-based electrolytes significantly improves their performance.…”

Section: Lithium Alloy Anodesmentioning

confidence: 99%

Vehicle Battery Safety Roadmap Guidance

Doughty¹

2012

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Printed on paper containing at least 50% wastepaper, including 10% post consumer waste. ForewordIn 2010, the National Renewable Energy Laboratory (NREL) entered into a subcontract agreement with Dr. Daniel Doughty, the principal of Battery Safety Consulting Inc. At NREL, we perform battery research and development (R&D) in areas of materials, modeling, testing, and system analysis, particularly as they relate to the lithium-ion (Li-ion) battery safety modeling and testing for electrified vehicles. This work was supported by the U.S. Department of Energy's (DOE) Energy Storage R&D Vehicle Technologies Program in the Office of Energy Efficiency and Renewable Energy under DOE/VTP Agreement 16378 of the 1102000 B&R, NREL Task Number FC086200.The purpose of the subcontract was to investigate the research, development, and other activities related to the safety of Li-ion batteries for electric drive vehicles and to provide recommendations for developing a DOE roadmap for the safety of Li-ion batteries for electric drive vehicles. Dr. Doughty has a long, distinguished career in battery R&D, particularly at Sandia National Laboratories (SNL), where he was responsible for the safety and abuse tolerance testing of batteries for more than 15 years. Dr. Doughty has chaired the Society of Automotive Engineers (SAE) committee that revised and updated SAE Recommended Test Procedure J2464, "Electric and Hybrid Electric Vehicle Rechargeable Energy Storage System (RESS) Safety and Abuse Testing," published November 2009. With his strong experience in battery safety and involvement with safety committees, Dr. Doughty was in a unique position to perform this work by collecting the necessary information, interacting with key players in the community, and providing recommendations.This document is divided into two sections: (1) the synopsis, which discusses high-level findings of the work, and (2) the full report, which provides a comprehensive, in-depth review of the state of the art and also discusses interactions with experts, users, researchers, and developers from different organizations interested in the safety of vehicle batteries.The findings and recommendations in this document will be taken into consideration by the Energy Storage R&D Program at the DOE Vehicle Technologies Program for further defining the R&D roadmap for developing safer batteries for electric drive vehicles. SynopsisThe safety of electrified vehicles with high-capacity energy storage devices creates challenges that must be met to ensure commercial acceptance of electric vehicles (EVs) and hybrid electric vehicles (HEVs). One of the most important objectives of DOE's Office of Vehicle Technologies is to support the development of Li-ion batteries that are safe and abuse tolerant in electric drive vehicles.Batteries for EVs and HEVs, which in this document includes plug-in hybrid electric vehicles (PHEVs), are different from batteries developed for other applications. The environment that vehicle traction batteries experience during their life is more diff...

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“…In addition, in some papers, only the LiC 6 anode was studied [11,[23][24][25][27][28][29][30], while in others, the complete cell was tested [13,[36][37][38][39][40][41]. The additives improving Li and LiC 6 performance were usually tested in electrolytes based on cyclic carbonates or carbonate mixtures, exhibiting SEI forming properties by themselves.…”

Section: Additivesmentioning

confidence: 99%

Solid electrolyte interphase formation on metallic lithium

Lewandowski

Swiderska‐Mocek

Waliszewski

2012

J Solid State Electrochem

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Solutions of three salts (LiBF 4 , LiNTf 2 , LiPF 6 ) in N-methyl-2-pyrrolidone (NMP), selected arbitrarily as a reference solvent, were investigated by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy techniques. The lithium surface in contact with LiPF 6 in NMP electrolyte was covered with a protective layer (SEI) which morphology comprise small particles (of ca. 0.2 μm in radius). This salt was selected for further studies. The impedance of the Li|(LiPF 6 in NMP+additive)|Li system was measured immediately after cell assembly and after galvanostatic charging/discharging. Fifteen different additives (10 wt.%) were used. The efficiency of individual additives was evaluated in terms of the Li|electrolyte system resistance (ΔR) or total cell impedance reduction, both deduced from EIS. Some of the additives were able to form the SEI layer and to reduce resistance/impedance of the Li| electrolyte interphase. In such cases, the lithium surface was covered with relatively uniform conglomerates, or regions separated by cracks, of ca. 1-2 μm in dimension.

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Effects of functional electrolyte additives for Li-ion batteries

Cited by 66 publications

References 20 publications

Elucidating the Beneficial Effect of Vinylene Carbonate on the Electrochemistry of Antimony Electrodes in Lithium Batteries

Elucidating the Beneficial Effect of Vinylene Carbonate on the Electrochemistry of Antimony Electrodes in Lithium Batteries

Vehicle Battery Safety Roadmap Guidance

Solid electrolyte interphase formation on metallic lithium

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