Electrolytes and additives for high efficiency lithium cycling

Eweka, E.I.; Owen, John R.; Ritchie, A.G.

doi:10.1016/s0378-7753(97)02482-8

Cited by 29 publications

(24 citation statements)

References 9 publications

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“…The reaction of the dendrites with the electrolyte as well as with various impurities results in corrosion and the subsequent isolation of lithium (so-called dead Li), which in turn produces a gradual loss of cycling capacity. 5,6 In addition, the loss of Li to the solid-electrolyte interphase (SEI) is thought to be the most common and fundamental source of capacity loss in Li metal batteries. The SEI layer is initially advantageous since it protects the Li metal from decomposition by the solvent.…”

Section: ¹1mentioning

confidence: 99%

“…Some researchers have tried to examine the efficiency of lithium usage in a Li metal battery. 5,6 Because Li-O 2 battery usually showed extremely excess amount of Li based capacity; the amount of Li metal for the capacity will be much larger than other battery systems and the utilization of Li is generally less than 20% in the conventional study. Therefore, influence of Li utilization on discharge capacity and cycle stability of Li-O 2 battery is required to be studied.…”

Section: ¹1mentioning

confidence: 99%

“…Although lithium has the advantage of possessing a very high theoretical specific capacity, there are some problems associated with dendrite (that is, needle-like shape lithium) growth on Li metal surfaces during charge and discharge cycles. 5,6,16,17 These dendrites are electrochemically the same as Li metal but if the connection to the anode is cut during discharge, it is reasonable to expect that the capacity will decrease over subsequent cycles due to the lack of electrical connection. Since the dendrites are partially inactive during the following discharge cycle, this reduces the efficiency of the cell during Li dissolution/deposition cycles.…”

Section: Electrochemistry 82(4) 267-272 (2014)mentioning

confidence: 99%

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Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

2014

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The effects of Li utilization on the capacity and cycle stability of Li-O 2 batteries were studied by investigating the performance of cells incorporating varying ratio of Li metal to air electrode catalyst. The quantity of Li metal was found to affect the overall discharge capacity, such that the capacity decreased with decreasing amounts of Li in the anode. Although a capacity of only 354 mAh g −1 (cathode) was obtained when the anode contained 0.9 mg Li, almost 100% of the Li in the cell was consumed during discharge, which corresponds to a capacity of 3932 mAh g −1 (Li). The cycle stability of cells operating under high Li utilization conditions was, however, significantly reduced. Detailed analysis of the Li distribution in the cell suggests that decreased usage of Li within the first few cycles is the cause of the poor cycle stability. The results of this study suggest that low cycle stability in a Li-O 2 battery may be attributed to the formation of a surface passivation layer on the Li metal composed primarily of Li 2 CO 3 and ROCO 2 Li and generated by reaction with the electrolyte.

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Section: ¹1mentioning

confidence: 99%

Section: ¹1mentioning

confidence: 99%

Section: Electrochemistry 82(4) 267-272 (2014)mentioning

confidence: 99%

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Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

2014

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“…Another concern is related to the formation of dendrites formed during the charge/discharge cycling of cells which could protrude through the separators and create short circuiting of the electrodes which poses a serious safety concern [10][11][12]. Recently, various approaches to overcome these shortcomings of polyolefin based separators have been reported.…”

Section: Introductionmentioning

confidence: 99%

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

Fu¹,

Luan²,

Argue³

et al. 2012

Journal of Power Sources

199

127

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tThe novelty of this work is the formation and deposition of SiO 2 , as opposed to deposition using commercially available SiO 2 powder suspension in the solution, to form ceramic coating on polypropylene (PP) separators for lithium-ion battery. The formation of SiO 2 nanoparticles with uniform particle size is accomplished through direct hydrolysis of tetraethyl orthosilicate (TEOS), while the deposition of the formed SiO 2 on PP separators was conducted in the same solution containing polyvinylidene fluoridehexafluoropropylene (PVDF-HFP) as binders and acetone as the solvent. The effects of the ceramic coating on the surface morphology, tensile strength, contact angles, electrolyte uptake, thermal shrinkage of the PP separators and the cell performances such as battery rate capability and Coulombic efficiency were investigated. The coated separators show significant reduction in thermal shrinkage and improvement in tensile strength, contact angles, electrolyte uptake and battery performance as compared to the plain PP separator. Crown

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“…[1][2][3][4][5][6] As demands for high power density batteries increase, industries face three major problems to overcome; cycle efficiency improvement, overcharging protection, and thermal stability enhancement. [7][8][9][10][11][12][13][14][15] One of the easiest methods to solve these problems is to incorporate small amount of functional additives into the electrolyte solution while maintaining basic formulation of the electrolyte unaltered. Various additives have been investigated in an attempt to improve cycle efficiency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characteristics of acrylol borate as new acrylic gelator for lithium secondary battery

et al. 2008

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A novel acrylol borate was designed and synthesized by reacting acrylate monomer and boric acid. The obtained acrylol borate was used as both gelator and anion receptor for the liquid electrolyte in a lithium secondary battery. It was found that the ionic conductivity of the gel polymer electrolyte (GPE) was as high as that of the liquid electrolyte, and the thermal stability of GPE was increased when only 2 wt% acrylol borate was incorporated into the liquid electrolyte. These results suggest that acrylol borate can be used as an effective additive to enhance the thermal stability of the electrolyte without adversely affecting its conductivity. It is believed that the strong complex formation between boron in the gelator and the anion of the salt is responsible for the enhanced thermal stability of the electrolyte solution and the increased ionic conductivity.

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Electrolytes and additives for high efficiency lithium cycling

Cited by 29 publications

References 9 publications

Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

Synthesis and characteristics of acrylol borate as new acrylic gelator for lithium secondary battery

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