Low-Temperature Conductivity Study of Multiorganic Solvent Electrolyte for Lithium-Sulfur Rechargeable Battery Application

Dharavath, Ravindar; Murali, Ashwin; Tarapathi, Abdul Wasi; Srinivasan, Balasubramanian Trichy; Kammili, Rambabu

doi:10.1155/2019/8192931

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0). [ 78 ] Copyright 2019, The Authors, published by Hindawi. b) Ionic conductivities of electrolytes with LiPF 6 , LiTFSI, LiBF 4 , and LiClO 4 salts in various carbonate‐based solvents at temperatures ranging from −40 to 60 °C.…”

Section: Low‐temperature Electrolytesmentioning

confidence: 99%

“…Future new salt explorations or existing salt blends should balance these three features to ensure low interfacial resistance, high electrolyte conductivity, and good interfacial stability. [78] Copyright 2019, The Authors, published by Hindawi. b) Ionic conductivities of electrolytes with LiPF 6 , LiTFSI, LiBF 4 , and LiClO 4 salts in various carbonate-based solvents at temperatures ranging from −40 to 60 °C.…”

Section: Lithium Salts For Organic Low-temperature Electrolytesmentioning

confidence: 99%

“…Over a wide temperature range (−40 to 60 °C), the LiTFSI salt at 1.0–1.4 m exhibited the highest ionic conductivity in mixed ether solvents, including DOL, 1,2‐dimethoxyethane (DME), and tetra(ethylene glycol) dimethyl ether (TEGDME) ( Figure a), [ 78 ] which is the compromise of solvent viscosity, salt solubility, and dissociation degree. Compared with the electrolytes containing LiPF 6 , LiTFSI, and LiClO 4 , LiBF 4 ‐based electrolytes exhibit the lowest ionic conductivity at RT but a much slower downtrend as temperature decreases (Figure 6b).…”

Section: Low‐temperature Electrolytesmentioning

confidence: 99%

“…Figure 6. a) Correlation between the ionic conductivity (mS cm −1 ) and LiTFSI concentration (m) for DOL-DME-TEGDME-based electrolytes at different temperatures from −40 to 60 °C. Reproduced under the terms of the CC-BY Creative Commons Attribution 4.0 International license (https:// creativecommons.org/licenses/by/4.0) [78]. Copyright 2019, The Authors, published by Hindawi.…”

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Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

et al. 2022

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With the highest energy density ever among all sorts of commercialized rechargeable batteries, Li‐ion batteries (LIBs) have stimulated an upsurge utilization in 3C devices, electric vehicles, and stationary energy‐storage systems. However, a high performance of commercial LIBs based on ethylene carbonate electrolytes and graphite anodes can only be achieved at above −20 °C, which restricts their applications in harsh environments. Here, a comprehensive research progress and in‐depth understanding of the critical factors leading to the poor low‐temperature performance of LIBs is provided; the distinctive challenges on the anodes, electrolytes, cathodes, and electrolyte–electrodes interphases are sorted out, with a special focus on Li‐ion transport mechanism therein. Finally, promising strategies and solutions for improving low‐temperature performance are highlighted to maximize the working‐temperature range of the next‐generation high‐energy Li‐ion/metal batteries.

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Section: Low‐temperature Electrolytesmentioning

confidence: 99%

Section: Lithium Salts For Organic Low-temperature Electrolytesmentioning

confidence: 99%

Section: Low‐temperature Electrolytesmentioning

confidence: 99%

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Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

et al. 2022

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“…And lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is selected as the lithium salt in this fluorinated carboxylic ester electrolyte due to its high ion conductivity and thermal stability. [ 14,28–30 ] Furthermore, high concentrated 2 m LiTFSI was adopted to realize a Li + ‐anions dominated solvation structure. [ 11,17,20,31–33 ] The low temperature performances of Li metal battery are optimized through a combining effect of reducing the melting point of the electrolyte and constructing a solvent deficient sheath structure.…”

Section: Introductionmentioning

confidence: 99%

High Performance Low‐Temperature Lithium Metal Batteries Enabled by Tailored Electrolyte Solvation Structure

Zou

Cheng

et al. 2023

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conductivity and even fails; [1][2][3][4] (3) limited charge transfer rate across the interface between the electrode and electrolyte at low temperature, which also depends on the de-solvation kinetics of the solvated Li + at the interface; (4) severe Li plating due to the large polarization of the anode at low temperature. [9][10][11] Since some recent studies demonstrated that the poor low-temperature performance of LIBs is manly limited by the low ionic diffusion in the graphite anode other than the cathode and the electrolyte, [12] graphite is not an ideal anode for the low temperature LIBs. Logically, Li metal anode has become a better alternative, which has higher energy density (3860 mAh g −1 ) and better performances in the low-temperature environments. [4,[13][14][15][16][17] However, harsh lithium dendrite growth and instability interface at low temperature are still huge challenges. According to previous reports, the electrolyte components have significant effects on the Li plating. Rational electrolyte formulation can not only inhibit the vigorous lithium dendrite growth, regulate the interfacial composition, but also increase the ionic conductivity of the electrolyte at low temperature, which greatly improves the low-temperature performances of lithium batteries. [10,15,[18][19][20][21][22] Traditional low-temperature electrolytes for lithium metal batteries are mainly ether electrolytes. Although ethers have low melting points, their electrochemical windows are narrow and often do not match with cathodes such as LFP and NCM. [4] In addition, ether electrolytes without tailoring solvation structure are prone to produce a large amount of organic components at the interface, which is not stable during the charging and discharging process. [23] Therefore, designing a novel electrolyte with tailored solvation structure, low melting point is an effective route to obtain a high performance low-temperature lithium metal battery. [11,24] Fluorinated solvents can provide more inorganic SEI components (mainly LiF) prior to solvent decomposition, which is due to the lower LUMO energies originated from the strong electronwithdrawing ability of F. [11,[25][26][27] Carboxylic esters generally have lower melting points than carbonates and higher oxidation limit than ethers. [2] Herein, diethyl fluoromalonate (DEFM) and fluoroethylene carbonate (FEC) are combined as the co-solvent of the electrolyte. And lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) is selected as the lithium salt in this fluorinated carboxylic ester electrolyte due to its high ion conductivity and thermal stability. [14,[28][29][30] Furthermore, high concentrated 2 m LiTFSI The electrochemical performances of lithium metal batteries are determined by the kinetics of interfacial de-solvation and ion transport, especially at low-temperature environments. Here, a novel electrolyte that easily de-solvated and conducive to interfacial film formation is designed for low-temperature lithium metal batteries. A fluorinated carboxylic ester, diethyl fl...

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Entropy‐Driven Solvation toward Low‐Temperature Sodium‐Ion Batteries with Temperature‐Adaptive Feature

et al. 2023

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Salt precipitation at temperatures far above the freezing point of solvents is primarily responsible for performance decay of rechargeable batteries at low temperature, yet is still challenged by a lack of in‐depth understanding of the design principle and ultimate solutions. Here, this is resolved via tuning the entropy of solvation in a strong‐solvation (SS) and weak‐solvation (WS) solvent mixture, in which a solvation structure can spontaneously transform at low temperature to avoid salt precipitation, endowing the electrolyte with a temperature‐adaptive feature. The results affirm that such temperature‐adaptive electrolyte ensures encouraging low‐temperature performance in a hard carbon||Na2/3Ni1/4Cu1/12Mn2/3O2 full cell with 90.6% capacity retention over 400 cycles at −40 °C. The generality of the concept is further expanded to construct a series of SS–WS electrolytes as potential candidates for rechargeable low‐temperature sodium‐ion batteries. The work shed lights on the importance of entropy tuning and affords a rational viewpoint on designing low‐temperature electrolytes.

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Low-Temperature Conductivity Study of Multiorganic Solvent Electrolyte for Lithium-Sulfur Rechargeable Battery Application

Cited by 10 publications

References 23 publications

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

Critical Review on Low‐Temperature Li‐Ion/Metal Batteries

High Performance Low‐Temperature Lithium Metal Batteries Enabled by Tailored Electrolyte Solvation Structure

Entropy‐Driven Solvation toward Low‐Temperature Sodium‐Ion Batteries with Temperature‐Adaptive Feature

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