Re-evaluating common electrolyte additives for high-voltage lithium ion batteries

Klein, Sven; Harte, Patrick; Wickeren, Stefan van; Borzutzki, Kristina; Röser, Stephan; Bärmann, Peer; Nowak, Sascha; Winter, Martin; Placke, Tobias; Kasnatscheew, Johannes

doi:10.1016/j.xcrp.2021.100521

Cited by 44 publications

(50 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a successful commercial additive, vinylene carbonate (VC) is inclined to form a protective layer on the anode to extend the cell lifespan [11] . However, even though it enhances the homogeneity of the SEI/graphite surface, VC is less suitable for fast charge (and high voltage) [12] . The reason should be the VC‐based SEI layer, composed of tangled rigid polymer chains, is thick and highly resistive under fast‐charging, which leads to severe parasitic reaction and voltage polarization [13] .…”

Section: Introductionmentioning

confidence: 99%

“…[11] However, even though it enhances the homogeneity of the SEI/graphite surface, VC is less suitable for fast charge (and high voltage). [12] The reason should be the VC-based SEI layer, composed of tangled rigid polymer chains, is thick and highly resistive under fast-charging, which leads to severe parasitic reaction and voltage polarization. [13] Hence, a LiF-rich and organics-poor SEI is obtained by adopting lithium bis(fluorosulfonyl)imide (LiFSI) as an additive, [14] which is considered to complement the fast-charging property.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery

Zhang

Hong-mei

2022

ChemistrySelect

View full text Add to dashboard Cite

Safe fast‐charging lithium‐ion batteries (LIBs) can be achieved by using LiFePO4 electrode and optimized electrolyte for the rapid development of electric vehicles. However, conventional carbonate electrolyte suffers resistive solid electrolyte interphase (SEI) that hampering the fast‐charging for LIBs. Herein, a multiple additive strategy, the combination of 1,3,2‐Dioxathiolane 2,2‐dioxide (DTD) and lithium difluorophosphate (DFP), is proposed to optimize the electrode interface for graphite (Gr)/LiFePO4(LFP) pouch cells under fast‐charging. Combining DTD with DFP can significantly reduce the charge transfer resistance of anode and greatly extend the lifespan of cells with >2400 cycles at a 2 C rate, which is much better than that of baseline and single additive based electrolytes with <1000 cycles. Further mechanistic studies revealed that proper sulfurized and phosphatized species are involved in the SEI film, which stabilizes lithium carbonate in the middle of SEI to avoid being attacked by Lewis acids. Multiple additive strategies optimize the interfacial structure and provide valuable guidance for the development of safe fast‐charging engineering.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery

Zhang

Hong-mei

2022

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…Traditional additives such as VC and FEC are good anode film formers, but VC shows a weak antioxidant capability and is unstable at high voltages in cathode materials [ 19 ]. FEC is regarded as being beneficial due to its good film-forming properties on graphite anodes; it is not suitable for high-voltage lithium-ion batteries because it facilitates Li metal dendrite penetration and aggravates the respective issues associated with rollover failure [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Voltage Additives on Formation of Solid Electrolyte Interphases in Lithium-Ion Batteries

et al. 2022

View full text Add to dashboard Cite

Solid electrolyte interphase (SEI) formed at the interface in lithium-ion batteries plays an important role in isolating electrons and permeating ions during charging/discharging processes. Therefore, the formation of a good interface is crucial for better battery performance. In this study, additives based on adiponitrile (ADN) and trimethyl borate (TMB) were employed to broaden the electrochemical window and form a good SEI layer. Electrochemical Atomic force microscopy (EC-AFM) was used for in situ studies of film-formation mechanisms in high-voltage electrolytes on high-temperature pyrolytic graphite (HOPG), as well as Li- and Mn-rich (LMR) materials. X-ray photoelectron spectroscopy (XPS) combined with electrochemical methods revealed a synergistic reaction between the two additives to form a more stable interfacial film during charging/discharging processes to yield assembled batteries with improved cycle performance, its capacity increased from below 100 mAh/g to 200 mAh/g after 50 cycles. In sum, these findings would have great significance for the development of high voltage lithium-ion batteries with enhanced performance.

show abstract

“…[7] Over the lifetime, additives stabilize the SEI under operating conditions, prevent further reaction of the electrolyte with the anode material, [8] and can suppress transition metal cross-talk. [9] Continuous formation and reformation of SEI is a key ageing process of LIB, driving loss of lithium inventory and increase of the internal resistance. [10] Additives have also extended the duration of cycle life before complete loss of capacity due to rollover.…”

Section: Introductionmentioning

confidence: 99%

Selection of Electrolyte Additive Quantities for Lithium‐Ion Batteries Using Bayesian Optimization

Hildenbrand

Aupperle

Stahl

et al. 2022

Batteries & Supercaps

View full text Add to dashboard Cite

The composition of the liquid electrolyte is a key factor in lifetime performance of lithium-ion batteries. The selection and quantification of additives to the electrolyte is an active field of research. This study focuses on finding the optimal additive combination of fluoroethylene carbonate (FEC) and vinylene carbonate (VC) for NMC622-Graphite cells. The central goal of this work is to accelerate the experimental search in a large search area by using a Bayesian-optimization algorithm to guide the search. Different measurements are used as target variable such as open-circuit voltage gradient and coulombic efficiency. Consequentially, the capability of these measurements for accelerated lifetime prediction compared to conventional ageing tests by cycling is investigated. The search gathered and confirmed additive combinations with excellent performance after four iterations with a total of 15 additive combinations analyzed. The results of this study give insights into the interaction of VC and FEC with regard to ageing.

show abstract

Re-evaluating common electrolyte additives for high-voltage lithium ion batteries

Cited by 44 publications

References 66 publications

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery

Effect of High-Voltage Additives on Formation of Solid Electrolyte Interphases in Lithium-Ion Batteries

Selection of Electrolyte Additive Quantities for Lithium‐Ion Batteries Using Bayesian Optimization

Contact Info

Product

Resources

About

Re-evaluating common electrolyte additives for high-voltage lithium ion batteries

Cited by 44 publications

References 66 publications

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO4 Pouch Battery

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO4 Pouch Battery

Effect of High-Voltage Additives on Formation of Solid Electrolyte Interphases in Lithium-Ion Batteries

Selection of Electrolyte Additive Quantities for Lithium‐Ion Batteries Using Bayesian Optimization

Contact Info

Product

Resources

About

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery

Fast‐Charging Electrolyte: A Multiple Additives Strategy with 1,3,2‐Dioxathiolane 2,2‐Dioxide and Lithium Difluorophosphate for Commercial Graphite/LiFePO₄ Pouch Battery