Improving the self-discharge behavior of sulfur-polypyrrole cathode material by LiNO3 electrolyte additive

Kazazi, Mahdi; Vaezi, Mohammad; Kazemzadeh, Asghar

doi:10.1007/s11581-014-1095-2

Cited by 39 publications

(49 citation statements)

References 29 publications

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“…[17] Am odified electrolyte containing LiNO 3 offered al ow self-discharge rate of 3.1 %f or as ulfur/ polypyrrole cathode. [20] Recently,W anga nd co-workers [10] reported as eries of fluorinated ether electrolytes to address the self-discharge issue. For example, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether was incorporated into ar outine 1,3-dioxolane (DOL) electrolyte system to efficientlys uppress the deleterious shuttling effect and effectively eliminate the self-discharge of the lithium-sulfurb attery.…”

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confidence: 99%

Towards Stable Lithium–Sulfur Batteries with a Low Self‐Discharge Rate: Ion Diffusion Modulation and Anode Protection

Peng

Huang

et al. 2015

ChemSusChem

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The self-discharge of a lithium-sulfur cell decreases the shelf-life of the battery and is one of the bottlenecks that hinders its practical applications. New insights into both the internal chemical reactions in a lithium-sulfur system and effective routes to retard self-discharge for highly stable batteries are crucial for the design of lithium-sulfur cells. Herein, a lithium-sulfur cell with a carbon nanotube/sulfur cathode and lithium-metal anode in lithium bis(trifluoromethanesulfonyl)imide/1,3-dioxolane/dimethyl ether electrolyte was selected as the model system to investigate the self-discharge behavior. Both lithium anode passivation and polysulfide anion diffusion suppression strategies are applied to reduce self-discharge of the lithium-sulfur cell. When the lithium-metal anode is protected by a high density passivation layer induced by LiNO3 , a very low shuttle constant of 0.017 h(-1) is achieved. The diffusion of the polysulfides is retarded by an ion-selective separator, and the shuttle constants decreased. The cell with LiNO3 additive maintained a discharge capacity of 97 % (961 mAh g(-1) ) of the initial capacity after 120 days at open circuit, which was around three times higher than the routine cell (32 % of initial capacity, corresponding to 320 mAh g(-1) ). It is expected that lithium-sulfur batteries with ultralow self-discharge rates may be fabricated through a combination of anode passivation and polysulfide shuttle control, as well as optimization of the lithium-sulfur cell configuration.

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confidence: 99%

Towards Stable Lithium–Sulfur Batteries with a Low Self‐Discharge Rate: Ion Diffusion Modulation and Anode Protection

Peng

Huang

et al. 2015

ChemSusChem

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“…As mentioned above, there are two main strategies for preventing self-discharge of Li-S cells: (1) by increasing the corrosion resistance of the metallic current collector in the electrolyte 17 and (2) by inhibiting the shuttle mechanism. 8 To understand the effect of LiNO 3 as a self-discharge suppressor, high concentrations of LiNO 3 was introduced in the electrolyte solvent. The self-discharge behavior of a Li-S cell with DOL/DME-1.0 M LiTFSI electrolyte containing 1.0 M LiNO 3 was studied.…”

Section: Resultsmentioning

confidence: 99%

“…For Li-S batteries, the self-discharge is a well-known issue due to the severe corrosion of lithium metal anode in the presence of the LiPS in the electrolyte. 5,6,8 Many attempts have been made to overcome the poor cycle life and low sulfur utilization of Li-S batteries.…”

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confidence: 99%

“…Kazazi et al have reported that the corrosion of the aluminum current collector and the shuttle mechanism play a significant role in the self-discharge of Li-S cells; therefore, LiNO 3 is a suitable electrolyte additive candidate to prevent self-discharge due to its effect on shuttle prevention. 8 Mikhaylik and Akridge reported that self-discharge mainly attributed from the high plateau polysulfides. Electrolytes with higher salt concentration also showed lower rates of Li corrosion with LiPS and a lower shuttle constant.…”

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confidence: 99%

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Fluorinated Electrolytes for Li-S Battery: Suppressing the Self-Discharge with an Electrolyte Containing Fluoroether Solvent

Azimi

Xue

Rago

et al. 2014

J. Electrochem. Soc.

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The fluorinated electrolyte containing a fluoroether 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) was investigated as a new electrolyte for lithium-sulfur (Li-S) batteries. The low solubility of lithium polysulfides (LiPS) in the fluorinated electrolyte reduced the parasitic reactions with Li anode and mitigated the self-discharge by limiting their diffusion from the cathode to the anode. The use of fluorinated ether as a co-solvent and LiNO 3 as an additive in the electrolyte shows synergetic effect in suppressing the self-discharge of Li-S battery due to the formation of the solid electrolyte interphase (SEI) on both sulfur cathode and the lithium anode. The Li-S cell with the fluorinated electrolyte showed prolonged shelf life at fully charged state. Lithium-sulfur (Li-S) batteries are considered to be promising candidates which can satisfy the demand for high energy density batteries in electronic and transportation devices due to their high theoretical capacity, intrinsic overcharge protection, low cost and nontoxicity. 1,2 Sulfur, one of the most abundant elements in the earth's crust, has a theoretical capacity value of 1675 mAh/g and is the cheapest solid state cathode material for energy storage devices.Despite the considerable advantages, there are several major issues that impede the practical applications of the Li-S battery.3 Sulfur undergoes a series of structural and morphological changes during charge and discharge, which results in the formation of soluble Li 2 S x (4 < x < 8) and insoluble Li 2 S 2 and Li 2 S. The formation of soluble lithium polysulfides (LiPS) and their chemical reaction with the electrolyte and lithium anode leads to low coulombic efficiency and rapid capacity fading. [4][5][6][7] In addition, Li-S battery suffers from severe self-discharge, which is the biggest hurdle for the commercialization of this battery. 8 A secondary battery will lose charge capacity when stored for a period of time at a certain temperature. This behavior is known as self-discharge and depends on the battery chemistry, electrode composition, choice of current collector, electrolyte formulation, and the storage temperature. For Li-S batteries, the self-discharge is a well-known issue due to the severe corrosion of lithium metal anode in the presence of the LiPS in the electrolyte. 5,6,8 Many attempts have been made to overcome the poor cycle life and low sulfur utilization of Li-S batteries.7-14 However, there are only a few publications focused on solving the self-discharge issue of the Li-S battery. Kazazi et al. have reported that the corrosion of the aluminum current collector and the shuttle mechanism play a significant role in the self-discharge of Li-S cells; therefore, LiNO 3 is a suitable electrolyte additive candidate to prevent self-discharge due to its effect on shuttle prevention.8 Mikhaylik and Akridge reported that self-discharge mainly attributed from the high plateau polysulfides. Electrolytes with higher salt concentration also showed lower rates of Li corrosion wit...

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“…81,[83][84][85][86][87][88][89][90] Al-Mahmoud et al 81 demonstrated an experimental-based model that the rate of self-discharge was markedly affected by the distance between the sulfur and Li electrodes. The authors also showed that the rate of selfdischarge was noticeably affected by the carbon content of the electrode, since the change of the electrode potential due to the increase in polysulfide concentration was buffered by the capacitive behavior of carbon.…”

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confidence: 99%

Introduction to Rechargeable Lithium–Sulfur Batteries

Demir‐Cakan

2017

Li-S Batteries

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Improving the self-discharge behavior of sulfur-polypyrrole cathode material by LiNO3 electrolyte additive

Cited by 39 publications

References 29 publications

Towards Stable Lithium–Sulfur Batteries with a Low Self‐Discharge Rate: Ion Diffusion Modulation and Anode Protection

Towards Stable Lithium–Sulfur Batteries with a Low Self‐Discharge Rate: Ion Diffusion Modulation and Anode Protection

Fluorinated Electrolytes for Li-S Battery: Suppressing the Self-Discharge with an Electrolyte Containing Fluoroether Solvent

Introduction to Rechargeable Lithium–Sulfur Batteries

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