Electrochemical behavior of Al in a non-aqueous alkyl carbonate solution containing LiBOB salt

Natsui, Hiroshi; Sun, Yang Kook; Yashiro, Hitoshi

doi:10.1016/j.jpowsour.2010.07.027

Cited by 27 publications

(9 citation statements)

References 11 publications

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“…[46] It shows many promising properties such as high thermal stability, ability to passivate aluminum substrates, and competence to form a stable SEI on graphite anode. [31,32,47,48] Recently, improved cycling stability was observed in many studies when LiBOB additive is utilized for high-voltage cathode materials such as LiNi 0.5 Mn 1.5 O 4 (LNMO), [49,50] LiCoPO 4 , [51] and LRLO. [52,53] The performance improvement has been attributed to the formation of a passivation CEI containing borate species, which would inhibit the HF attack and electrolyte oxidation at high voltage.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Shimizu

et al. 2022

Advanced Energy Materials

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high energy density LIBs is increasing. [2] Lithium-rich layered oxide (LRLO) as a high-energy cathode material has attracted many interests due to its large specific capacity (over 300 mAh g −1 ). [3,4] Accompanied by Li extraction/insertion during charge and discharge, LRLO experiences not only the transition metal (TM) redox but also the oxygen redox which contributes a large portion to its high capacity. [5,6] Despite its high capacity, the practical deployment of LRLO is hindered by voltage fade and capacity decay during electrochemical cycling. [7,8] These two issues are correlated to the activation of oxygen redox at high voltage (>4.5 V versus Li + /Li 0 ), which leads to surface and structure degradation during cycling, such as the formation of oxygen vacancies and irreversible oxygen loss, [8,9] the migration and the dissolution of TM, [10,11] the formation of spinel-like phase, [4] and the accumulation of microstrain. [12] Intensive materials modification efforts have been devoted to addressing the capacity and voltage decay issues in LRLO. Surface coating with oxides or fluorides such as Al 2 O 3 and AlF 3 was applied to reduce the oxygen release and protect the surface from acidic species in the electrolyte. [13][14][15] Both cation and anion doping such as Mg, Mo, F were also designed to mitigate the capacity and voltage decay through the altering of electronic structure and the suppression of structural degradation. [16][17][18] Heat treatment and re-lithiation on cycled LRLO materials were also studied to recover the capacity and voltage decay after electrochemical cycling through the recovery of the honeycomb ordering in the TM layer. [19,20] Besides the modification on active materials, many cell components have also been optimized for high-voltage operation such as the binder and conductive agents. [21] However, the compatibility of the electrolyte with the charged state of LRLO is often neglected in the literature. The activation step ubiquitously seen in anionic redox materials occurs at 4.5 V versus Li + / Li 0 . For the commonly used carbonate-based liquid electrolytes, when the voltage is pushed above this limit (4.5 V), the electrolytes decompose through the following processes: carbonatebased organic solvents such as ethylene carbonate (EC) oxidize and decompose at high voltage, accompanied by dehydrogenation reaction as the protons attached to the carbon in the carbonate solvents are dissociated. [22] The protons may further Lithium-rich layered oxides (LRLO) have attracted great interest for high-energyLi-ion batteries due to their high theoretical capacity. However, capacity decay and voltage fade during the cycling impede the practical application of LRLO. Herein, the use of lithium bis-(oxalate)borate (LiBOB) as an electrolyte additive is reported to improve the cycling stability in high voltage LRLO/graphite full cells. The cell with LiBOB-containing electrolyte delivers 248 mAh g −1 initial capacity and shows no capacity decay after 70 cycles as well as 95.5% retention after 150 c...

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Section: Introductionmentioning

confidence: 99%

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Shimizu

et al. 2022

Advanced Energy Materials

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“…9 The addition of LiPF 6 also could lead to the formation of AlF 3 -containing passivation layers. 12 Effective passivation lms on Al foil have also been reported when LiBOB [lithium bis(oxalato)borate, LiB(C 2 O 4 ) 2 ] is added to the electrolytes; 7,[13][14][15][16] however, the mechanism of formation of this protection lm was not disclosed. In addition, only a small amount (#2% by weight) of LiBOB has been added in LiTFSIbased electrolytes as an additive (usually dened as <5% of the electrolyte either by weight or by volume 15 ), and little effort has been made to study the passivation effect of LiBOB on corrosion suppression of the cathode current collector in real cells with active materials coated on Al foil, especially at high temperatures (60 C).…”

Section: Introductionmentioning

confidence: 99%

Mixed salts of LiTFSI and LiBOB for stable LiFePO4-based batteries at elevated temperatures

et al. 2014

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“…4,5 To solve the above issues, lithium bis(oxalato)borate (LiBOB) was rst proposed as a promising candidate for LiPF 6 because of its advantages such as wide electrochemical window, high thermal stability, uorine free in the structure, ability to passivate aluminum current collector, and ability to form a stable solid-electrolyte interface (SEI) at the surface of graphitic anode even in pure propylene carbonate (PC) solvent. 6,7 Angell and co-workers [8][9][10] synthesized LiBOB using lithium tetramethanolatoborate LiB(OCH 3 ) 4 and di(trimethylsilyl) oxalate (CH 3 ) 3 SiOOCCOOSi(CH 3 ) 3 in anhydrous acetonitrile (AN). And then LiBOB was recrystallized from boiling AN/ toluene (1 : 1 mixture), cooled to À20 C to obtain pure product.…”

Section: Introductionmentioning

confidence: 99%

Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li_1.16[Mn_0.75Ni_0.25]_0.84O₂cathode

Lian

Yang

et al. 2015

RSC Adv.

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Lithium bis(oxalato)borate (LiBOB) were synthesized via a novel rheological phase reaction method without any recrystallization procedure. The purity of the as-obtained LiBOB has been identified in comparison with the commercial sample and our sample prepared from solid-state reaction method. The results of XRD, ICP, and 11 B NMR demonstrate that high pure LiBOB has been synthesized via rheological phase reaction method with significantly simplified synthetic process. Moreover, LiBOB sample has been investigated as electrolyte additive to improve the electrochemical performances of high-energy lithium-rich layered oxide. The cycling performances imply that 0.03M and 0.05M LiBOB additive can mitigate discharge voltage fade and enhance the cycle stability of Li1.16[Mn0.75Ni0.25]0.84O2 material. The CV, EIS and XPS data indicate that LiBOB oxidizes at ~4.3 V (vs. Li/Li + ) on the cathode surface during the first charge to form a specific SEI layer with larger amount of organic species and fairly less content of LiF, which decreases the interfacial polarization and protects the active material from surface degradation, thereby mitigates the voltage-fade of Li-rich cathode.

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Electrochemical behavior of Al in a non-aqueous alkyl carbonate solution containing LiBOB salt

Abstract: Aluminum was studied as a current collector for rechargeable lithium batteries to understand electrochemical and passivation behavior. Electrochemical polarization tests, in situ scratch polarization tests and time-of-flight secondary ion mass spectroscopy

Cited by 27 publications

References 11 publications

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Mixed salts of LiTFSI and LiBOB for stable LiFePO4-based batteries at elevated temperatures

Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li_1.16[Mn_0.75Ni_0.25]_0.84O₂cathode

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Electrochemical behavior of Al in a non-aqueous alkyl carbonate solution containing LiBOB salt

Abstract: Aluminum was studied as a current collector for rechargeable lithium batteries to understand electrochemical and passivation behavior. Electrochemical polarization tests, in situ scratch polarization tests and time-of-flight secondary ion mass spectroscopy

Cited by 27 publications

References 11 publications

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Elucidating the Effect of Borate Additive in High‐Voltage Electrolyte for Li‐Rich Layered Oxide Materials

Mixed salts of LiTFSI and LiBOB for stable LiFePO4-based batteries at elevated temperatures

Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li1.16[Mn0.75Ni0.25]0.84O2cathode

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Preparation of LiBOB via rheological phase method and its application to mitigate voltage fade of Li_1.16[Mn_0.75Ni_0.25]_0.84O₂cathode