Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries

Yang, Li; Wang, Peng; Zhao, Dongni; Wang, Yuan; Han, Yamin; Zeng, Shuangwei; Wang, Chao; Li, Shiyou

doi:10.1039/d0se00529k

Cited by 8 publications

(19 citation statements)

References 46 publications

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“…31,33,51−53 Additionally, a protective LiBOB-derived SEI will develop on the electrode surface, enhancing the interfacial stability for high temperature operations. 14,46 ■ CONCLUSIONS LiBOB was synthesized under protective atmosphere using lithium carbonate, oxalic acid, and boric acid as low-cost starting materials by applying ceramic processing methods to achieve a high purity product. Aging investigations were also As shown from the XRPD data and FTIR and Raman spectra, the resulting salt is anhydrous and high purity over ∼ 99 wt %; thus, a higher purity is obtained with fewer and practical processing steps compared to some commercial products and LiBOB reported in the literature.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…LiBOB provides electrochemical stability at high applied potentials and high thermal stability under different electrochemical conditions [4][5][6] . LiBOB also promotes the formation of a protective solid-electrolyte interface (SEI) layer; thus increasing capacity and cycle life when used as an electrolyte additive [7][8][9][10][11][12][13][14] .…”

Section: Introductionmentioning

confidence: 99%

“…The high oxidation state of Cl(VII) in LiClO 4 causes reactions with a range of organic solvents 24 , and As(III) and As(0) that form during redox reactions involving Li-AsF 6 are toxic 25 , and LiTf based electrolytes are highly corrosive 23 . On the other hand, LiBOB has received great interest owing to its superior properties such as thermal stability, good solubility in organic solvents, improved cycling stability with high voltage cathodes, environmentally friendliness, and low cost 9,11,14,26,27 . LiBOB was also shown to protect graphite anodes from exfoliation in PC-based electrolytes and to develop a SEI on the surface of carbon based cathode materials 6 .…”

Section: Introductionmentioning

confidence: 99%

“…23 On the other hand, LiBOB has received great interest owing to its superior properties such as good solubility in organic solvents, improved cycling stability with high voltage cathodes, environmentally friendliness, and low cost. 9,11,14,26,27 Additionally, other potentially corrosive and dangerous byproducts such as HF, PF 5 , and LiF do not evolve upon cycling when LiBOB is used. 28−30 LiBOB was also shown to protect graphite anodes from exfoliation in PC-based electrolytes and to form a SEI on the graphitic anode surface.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Electrolyte salts and additives play a crucial role in increasing the cycle life, capacity, and safety of batteries especially for high voltage applications. − Lithium bis(oxalate) borate, LiB(C 2 O 4 ) 2 (LiBOB), is one of the most widely used electrolyte additives in Li-ion batteries and has the potential to be an alternative for the commercially used lithium hexafluorophosphate (LiPF 6 ) as an electrolyte salt when dissolved in suitable solvents. LiBOB provides electrochemical stability at high applied potentials and high thermal stability under various electrochemical conditions. − LiBOB also promotes the formation of a protective solid–electrolyte interface (SEI) layer, thus increasing capacity and cycle life when used as an electrolyte additive. − …”

Section: Introductionmentioning

confidence: 99%

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Guide to Water Free Lithium Bis(oxalate) Borate (LiBOB)

et al. 2021

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Lithium bis(oxalate)borate, LiB(C 2 O 4 ) 2 (LiBOB), is one of the most important electrolyte additives for Li-ion batteries (LIBs) due to its numerous advantages such as thermal stability, good solubility in organic solvents, high conductivity, and low cost as well as providing safer operations with superior electrochemical performance compared to conventional electrolyte combinations. However, the use of LiBOB is limited due to slight instability issues under ambient conditions that might require extra purification steps and might result in poorer performances in real systems. Here, we address some of these issues and report the high purity water free LiBOB synthesized with fewer processing steps employing lithium carbonate, oxalic acid, and boric acid as lowcost starting materials, and via ceramic processing methods under protective atmosphere. The physical and chemical characterizations of both anhydrous and monohydrate phases are performed with X-ray powder diffraction (XRPD), Fourier-transform infra-red spectroscopy (FTIR), Raman spectroscopy and scanning electron microscopy (SEM) analyses to determine the degree of the purity and the formation of impurities like LiBOB.H 2 O, HBO 2 and Li 2 C 2 O 4 as a result of the aging investigations performed. Differential thermal analysis (DTA) is applied to determine the optimum synthesis conditions for anhydrous LiBOB and to analyze the water loss and the decomposition of LiBOB.H 2 O. Aging experiments with the water free LiBOB are carried out to evaluate the effect of humidity in the phase changes and resulting impurities under various conditions. The detrimental effect of even slightest humidity conditions is shown, and protective measures during and after the synthesis of LiBOB are discussed. Anhydrous LiBOB could be widely used as an electrolyte additive to improve the overall electrochemical performances for LIBs through development of a protective solid electrolyte interphase (SEI) on the surface of high voltage cathodes and bringing about superior electrochemical properties with increased cycling stability, rate capability and coulombic efficiency, if synthesized, purified, and handled properly before use in real electrochemical systems.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Guide to Water Free Lithium Bis(oxalate) Borate (LiBOB)

et al. 2021

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Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

Wan,

Ma,

Wang

et al. 2024

Advanced Materials

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With the continuously growing demand for wide‐range applications, lithium‐ion batteries (LIBs) have been increasingly required to work under conditions that deviate from room temperature. However, commercial electrolytes exhibit low thermal stability at high temperatures and poor dynamic properties at low temperatures, hindering the operation of LIBs under extreme conditions. The bottleneck restricting the practical applications of LIBs has promoted researchers to pay more attention to developing a series of innovative electrolytes. This review primarily covers the design of electrolytes for LIBs from a temperature adaptability perspective. Firstly, we elaborate on the fundamentals of electrolytes concerning temperature, including donor number, dielectric constant, viscosity, conductivity, ionic transport, and theoretical calculations. Secondly, prototypical examples, such as lithium salts, solvent structures, additives, and interfacial layers in both liquid and solid electrolytes, are presented to explain how these factors can affect the electrochemical behavior of LIBs at high or low temperatures. Meanwhile, the principles and limitations of electrolyte design are discussed under the corresponding temperature conditions. Finally, a summary and outlook regarding electrolyte design to extend the temperature adaptability of LIBs are proposed.This article is protected by copyright. All rights reserved

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Prospective Application, Mechanism, and Deficiency of Lithium Bis(oxalate)Borate as the Electrolyte Additive for Lithium‐Batteries

Yang²,

et al. 2023

Advanced Energy Materials

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Lithium bis(oxalate)borate (LiBOB) is one of the most common film‐forming electrolyte additives used in lithium ion batteries (LIBs), since it can form a dense boron‐containing polymer as a solid electrolyte interlayer (or cathode electrolyte interlayer) in order to isolate the electrode material from the electrolyte and prevent side reactions. LiBOB can serve as HF scavenger to maintain the structural integrity of electrodes via avoiding the transition metal dissolution caused by HF attack. LiBOB also can react with LiPF6 to generate lithium difluoro (oxalate)borate (LiDFOB) that can be further used as a clean‐up agent for reactive oxygen radicals. This article lists the application of LiBOB in high capacity and high voltage cathode materials, and also reviews the working mechanisms of LiBOB used in these materials to improve the performance of LIBs. Finally, it presents the current shortcomings of LiBOB and strategies to overcome these. This article is expected to provide useful insights for employing LiBOB as a feasible method of dealing with the difficulty of running high capacity LIBs stably under high voltage.

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Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries

Abstract: The CEI film with substances containing B–O and organic component improves the cyclic stability of cells at extra-high temperature.

Cited by 8 publications

References 46 publications

Guide to Water Free Lithium Bis(oxalate) Borate (LiBOB)

Guide to Water Free Lithium Bis(oxalate) Borate (LiBOB)

Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

Prospective Application, Mechanism, and Deficiency of Lithium Bis(oxalate)Borate as the Electrolyte Additive for Lithium‐Batteries

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