Recent Achievements on the Liquid Electrolytes for Fast‐Charging Lithium Metal Batteries

Li, Fang; Li, Guoxing

doi:10.1002/ente.202201397

Cited by 7 publications

(2 citation statements)

References 124 publications

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“…In order to achieve fast charging capabilities for high-voltage Li metal batteries, it is imperative to develop advanced electrolyte systems through the careful selection of appropriate solvents, salts, and additives to create a rational solvation structure. [45,46] As discussed earlier, the solvation structures of Li ions result from the competitive coordination of various solvents and anions, which can be influenced by the choice of Li salts, solvents, and additives. Li salts represent one of the most critical components of the electrolyte.…”

Section: Electrolyte Design Principle For Fast Charging High-voltage ...mentioning

confidence: 99%

Boosting Fast‐Charging Capability of High‐Voltage Li Metal Batteries with Ionic Liquid Modified Ethereal Electrolyte

Ding,

Begin,

Yuan

et al. 2023

Advanced Energy Materials

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Given the high compatibility with Li metal anodes, ethereal electrolytes have found widespread use in Li metal batteries. Unfortunately, their applications in high‐voltage Li metal batteries are hampered by a limited electrochemical window. In this study, a diluted ethereal electrolyte (with Li salt concentration < 1.5 m) is developed containing 1 m lithium bis(fluorosulfonyl) imide (FSI) and 0.3 m LiNO3 in a N‐methyl‐N‐propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13TFSI):dimethyl ether (DME) (v:v = 1:4) mixture for Li metal batteries with an aggressive high‐voltage cathode via the formation of an anion‐enriched solvation sheath. In contrast to high‐concentration electrolytes, the formation of the anion‐enriched solvation sheath in this design is facilitated by the addition of ionic liquids. Further theoretical calculations indicate that the presence of FSI− and NO3− anions in the first solvation sheath weakens the desolvation energy of the DME solvent, suggesting a faster desolvation process at the electrode interphase. Consequently, the designed electrolyte enables long‐term cycling of Li || LiNi0.8Co0.1Mn0.1O2 (NCM811) full cells over 1000 cycles at a high rate of 10 C. More notably, it also allows for a long cycle life of 100 cycles under a high rate of 5 C, even with limited negative capacity to positive capacity (N/P) ratio of 1.

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Section: Electrolyte Design Principle For Fast Charging High-voltage ...mentioning

confidence: 99%

Boosting Fast‐Charging Capability of High‐Voltage Li Metal Batteries with Ionic Liquid Modified Ethereal Electrolyte

Ding,

Begin,

Yuan

et al. 2023

Advanced Energy Materials

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“…Fast-charging lithium (Li) metal batteries (LMBs) with high energy density and fast-charging capability are recognized as powerful candidates to ease mileage anxiety and charging anxiety of the rapidly developing electric vehicles (EVs). − However, the uncontrollable growth of Li dendrites and the unreliable solid electrolyte interphase (SEI) especially under fast-charging conditions usually hinder the practical application of LMBs . As a core process when a Li metal anode (LMA) works in LMBs, Li deposition generally includes the steps of Li + desolvation on the surface of the LMA, ionic diffusion in the SEI layer, and Li + reduction on the Li metal .…”

mentioning

confidence: 99%

Ordered Lithium-Ion Conductive Interphase with Gradient Desolvation Effects for Fast-Charging Lithium Metal Batteries

Song

Zhao

et al. 2023

ACS Energy Lett.

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Efficient desolvation and fast lithium ion (Li + ) transport are key factors for fast-charging Li metal batteries (LMBs). Here, we report a self-assembled interphase (SAI) with ordered Li + transport pathways to enable high Li + conductivity and fast Li + desolvation for fastcharging LMBs. A self-assembled structure originating from the intermolecular π−π stacking endows SAI with ordered Li + transport pathways. The regular molecular stacking and a gradient distribution of functional groups of SAI contribute to a spatially confined gradient desolvation of Li + . Thereby, a stable Li metal anode (LMA) with durable solid-electrolyte interphase, accelerated Li + transfer, and homogeneous Li plating/stripping is achieved at high rates. A full-cell battery of SAI protected LMA|LiNi 0.8 Co 0.1 Mn 0.1 O 2 delivers a high capacity of 147 mAh g −1 with an improved capacity retention for 500 cycles at 3 C (1 C = 210 mA g −1 ), and the full cell can deliver over 71% of its capacity in 12 min.

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Breaking Mass Transport Limitations by Iodized Polyacrylonitrile Anodes for Extremely Fast‐Charging Lithium‐Ion Batteries

Ma,

Zhao,

Gao

et al. 2023

Angewandte Chemie

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The fast‐charging capability of rechargeable batteries is greatly limited by the sluggish ion transport kinetics in anode materials. Here we develop an iodized polyacrylonitrile (I‐PAN) anode that can boost the bulk/interphase lithium (Li)‐ion diffusion kinetics and accelerate Li‐ion desolvation process to realize high‐performance fast‐charging Li‐ion batteries. The iodine immobilized in I‐PAN framework expands ion transport channels, compresses the electric double layer, and changes the inner Helmholtz plane to form LiF/LiI‐rich solid electrolyte interphase layer. The dissolved iodine ions in the electrolyte self‐induced by the interfacial nucleophilic substitution of PF6‐ not only promote the Li‐ion desolvation process, but also reuse the plated/dead Li formed on the anode under fast‐charging conditions. Consequently, the I‐PAN anode exhibits a high capacity of 228.5 mA h g‐1 (39% of capacity at 0.5 A g‐1 delivered in 18 seconds) and negligible capacity decay for 10000 cycles at 20 A g‐1. The I‐PAN||LiNi0.8Co0.1Mn0.1O2 full cell shows excellent fast‐charging performance with attractive capacities and negligible capacity decay for 1000 cycles at extremely high rates of 5 C and 10 C (1 C = 180 mA g‐1). We also demonstrate high‐performance fast‐charging sodium‐ion batteries using I‐PAN anodes.

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Recent Achievements on the Liquid Electrolytes for Fast‐Charging Lithium Metal Batteries

Cited by 7 publications

References 124 publications

Boosting Fast‐Charging Capability of High‐Voltage Li Metal Batteries with Ionic Liquid Modified Ethereal Electrolyte

Boosting Fast‐Charging Capability of High‐Voltage Li Metal Batteries with Ionic Liquid Modified Ethereal Electrolyte

Ordered Lithium-Ion Conductive Interphase with Gradient Desolvation Effects for Fast-Charging Lithium Metal Batteries

Breaking Mass Transport Limitations by Iodized Polyacrylonitrile Anodes for Extremely Fast‐Charging Lithium‐Ion Batteries

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