Electrolytes with Solvating Inner Sheath Engineering for Practical Na–S Batteries

Guo, Dong; Wang, Jiaao; Lai, Tianxing; Henkelman, Graeme; Manthiram, Arumugam

doi:10.1002/adma.202300841

Cited by 33 publications

(16 citation statements)

References 39 publications

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“…Nuclear magnetic resonance (NMR) and Raman spectroscopy were conducted to prove our prediction of the solvation structure in the QSE. 19 F and 7 Li NMR spectra show consistent results of increased Li + –FSI – interaction and decreased Li + –solvent interaction in the QSE compared to the C-LHCE (Figure c). − The QSE produces similar Raman spectra to the C-LHCE in the range 730–760 cm –1 , corresponding to the S–N–S bending/vibration of FSI – (Figure d). A slight blue shift indicates a higher content of aggregate ion pairs (AGGs) with more depleted solvents in the solvation structure in the QSE. , All of these results confirm that the QSE retains an anion-dominated solvation structure that contains a rather higher anion content.…”

Section: Resultssupporting

confidence: 54%

A Semisolvated Sole-Solvent Electrolyte for High-Voltage Lithium Metal Batteries

Piao,

Wu,

Ren

et al. 2023

J. Am. Chem. Soc.

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Lithium metal batteries (LMBs) coupled with a high-voltage Ni-rich cathode are promising for meeting the increasing demand for high energy density. However, aggressive electrode chemistry imposes ultimate requirements on the electrolytes used. Among the various optimized electrolytes investigated, localized high-concentration electrolytes (LHCEs) have excellent reversibility against a lithium metal anode. However, because they consist of thermally and electrochemically unstable solvents, they have inferior stability at elevated temperatures and high cutoff voltages. Here we report a semisolvated sole-solvent electrolyte to construct a typical LHCE solvation structure but with significantly improved stability using one bifunctional solvent. The designed electrolyte exhibits exceptional stability against both electrodes with suppressed lithium dendrite growth, phase transition, microcracking, and transition metal dissolution. A Li||Ni0.8Co0.1Mn0.1O2 cell with this electrolyte operates stably over a wide temperature range from −20 to 60 °C and has a high capacity retention of 95.6% after the 100th cycle at 4.7 V, and ∼80% of the initial capacity is retained even after 180 cycles. This new electrolyte indicates a new path toward future electrolyte engineering and safe high-voltage LMBs.

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Section: Resultssupporting

confidence: 54%

A Semisolvated Sole-Solvent Electrolyte for High-Voltage Lithium Metal Batteries

Piao,

Wu,

Ren

et al. 2023

J. Am. Chem. Soc.

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“…Meanwhile, the area of designing electrolyte additives for Li-S batteries to mitigate the shuttle effect and protect the Li anode is promising, yet less explored. [23,24] LiNO 3 is a commonly used additive for ether-based electrolytes in Li-S batteries. It can passivate the Li surface by converting the precipitating reduced sulfide species to oxidized sulfate species (Li 2 S x O y ), forming a relatively stable SEI layer.…”

Section: Introductionmentioning

confidence: 99%

Lithium Tritelluride as an Electrolyte Additive for Stabilizing Lithium Deposition and Enhancing Sulfur Utilization in Anode‐Free Lithium–Sulfur Batteries

Lai

Bhargav

Manthiram

2023

Adv Funct Materials

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Despite the potential to become the next‐generation energy storage technology, practical lithium–sulfur (Li–S) batteries are still plagued by the poor cyclability of the lithium‐metal anode and sluggish conversion kinetics of S species. In this study, lithium tritelluride (LiTe3), synthesized with a simple one‐step process, is introduced as a novel electrolyte additive for Li–S batteries. LiTe3 quickly reacts with lithium polysulfides and functions as a redox mediator to greatly improve the cathode kinetics and the utilization of active materials in the cathode. Moreover, the formation of a Li2TeS3/Li2Te‐enriched interphase layer on the anode surface enhances ionic transport and stabilizes Li deposition. By regulating the chemistry on both the anode and cathode sides, this additive enables a stable operation of anode‐free Li–S batteries with only 0.1 m concentration in conventional ether‐based electrolytes. The cell with the LiTe3 additive retains 71% of the initial capacity after 100 cycles, while the control cell retains only 23%. More importantly, with high utilization of Te, the additive enables significantly better cyclability of anode‐free pouch full‐cells under lean electrolyte conditions.

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“…This cell delivered an initial discharge capacity of approximately 670 mA h g −1 at 0.1 C and maintained a remarkable capacity retention of 75% even after 50 cycles, demonstrating its potential for stable and long-lasting performance in practical applications. 412…”

Section: Insight Into the Practical Application Of Nmbsmentioning

confidence: 99%

Na metal anodes for liquid and solid-state Na batteries

Pirayesh,

Jin,

Wang

et al. 2024

Energy Environ. Sci.

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Electrolytes with Solvating Inner Sheath Engineering for Practical Na–S Batteries

Cited by 33 publications

References 39 publications

A Semisolvated Sole-Solvent Electrolyte for High-Voltage Lithium Metal Batteries

A Semisolvated Sole-Solvent Electrolyte for High-Voltage Lithium Metal Batteries

Lithium Tritelluride as an Electrolyte Additive for Stabilizing Lithium Deposition and Enhancing Sulfur Utilization in Anode‐Free Lithium–Sulfur Batteries

Na metal anodes for liquid and solid-state Na batteries

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