An inorganic-rich SEI induced by LiNO<sub>3</sub> additive for a stable lithium metal anode in carbonate electrolyte

Liu, Dongdong; Xiong, Xunhui; Liang, Qianwen; Wu, Xianwen; Fu, Haikuo

doi:10.1039/d1cc03676a

Cited by 57 publications

(40 citation statements)

References 23 publications

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“…LiNO 3 has been widely adopted as an electrolyte additive in lithium–sulfur batteries to suppress the “shuttling effect”, in which it reacts with Li to form a robust surface layer to protect the Li anode from reacting with the dissolved lithium polysulfides. , However, LiNO 3 is rarely used as the main salt since the strong interaction force between Li + and NO 3 – limits the dissociation in a common electrolyte solvent. , Comparing the solvent properties, as shown in Table S1, a novel aprotic organic solvent with high polarity DMI is proposed. The high donor number (27.8) and dielectric constant (37.6) enable remarkable solubility of LiNO 3 as high as 7 M. Considering the extremely high viscosity and sharply decreased ionic conductivity over a 3 M concentration (Table S2), herein, a 3 M LiNO 3 /DMI electrolyte is employed for further characterization.…”

Section: Resultsmentioning

confidence: 99%

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Zhou

Chen

Yang

et al. 2021

ACS Appl. Energy Mater.

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Rechargeable Li-metal anodes have received abundant attention for high-energy-density batteries. A solid electrolyte interphase (SEI) plays a significant role in regulating the Li + deposition/stripping process. Aimed to solve detrimental Li deposition with a dendritic and mossy morphology, herein, dendrite-free columnar Li deposition in micron size is constructed via creatively adopting a LiNO 3 -based electrolyte even at a high current density (2 mA cm −2 ) and areal capacity (4 mAh cm −2 ). N-rich inorganic SEI (Li 3 N and LiN x O y ) with superior Li + conductivity is formed on Li deposition, which enables remarkable reversibility and high average Coulombic efficiency (CE) even over 240 cycles. A Li∥LiFePO 4 cell delivers excellent cycling stability over 700 cycles with a capacity fading rate of merely 0.022% per cycle. This work provides a way to regulating columnar Li deposition via N-rich SEI coordination and developing electrolyte formulations for secondary Li-metal batteries.

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Section: Resultsmentioning

confidence: 99%

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Zhou

Chen

Yang

et al. 2021

ACS Appl. Energy Mater.

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“…The change of impedance with the operation of symmetric cells was also detected to monitor the inner structure of batteries. − For the Li metal without protection and LiI-protected Li metal-based symmetric cells, two obvious semicircles, which refer to the charge-transfer resistance ( R ct ) at a low frequency and interfacial resistance ( R inf ) between the anode and liquid electrolyte at a high frequency, were observed (Figure d,e). In the initial condition, symmetric cells with the LiI-protected Li metal and Li metal without protection show similar interfacial resistance values of 109.67 and 114.22 Ω, respectively.…”

Section: Resultsmentioning

confidence: 99%

Stabilizing Li Anodes in I₂ Steam to Tackle the Shuttling-Induced Depletion of an Iodide/Triiodide Redox Mediator in Li–O₂ Batteries with Suppressed Li Dendrite Growth

Zou

Cheng

Lü

et al. 2021

ACS Appl. Mater. Interfaces

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Redox mediators (RMs) have become a significant point in the now-established Li−O 2 battery system to reduce the charging overpotential in the oxygen evolution process. Nevertheless, a major inherent barrier of the RM is the redox shuttling between the Li metal anode and mobile RM, resulting in the corrosion of Li and depletion of RM. In this study, taking iodide/triiodide as a model RM, we propose an effective strategy by immersing the Li metal anode in I 2 steam to create a 1.5 μm thick surface protective layer. The resultant ionic conductive LiI layer on the Li metal anode can not only suppress Li dendrite growth but also act as a buffer layer between the RM and bare Li. By combining the iodide/triiodide RM with the LiI protective layer, the Li−O 2 battery shows low and steady charge voltage plateaus of ∼3.6 V over 70 cycles. Importantly, the symmetrical cell using the LiI-protected Li electrode exhibited small Li plating/stripping overpotentials (∼20 mV, 480 h), far superior to that of the bare Li electrode (∼70 mV, 300 h). The in situ interfacial observation shows that dendrite growth on the Li metal can be effectively suppressed by optimizing the LiI protective layer.

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“…Additionally, the ionic conductivity of SEI determined by the solid–solid interfacial ionic transport property is critical for the rate performance of the battery. The strategies for resolving interface issues include optimizing and designing SE to form stable SEI with good compatibility, applying a coating layer as an artificial SEI, , and using interfacial engineering to form a stable SEI. At present, wetting the interface by addition of a small amount of liquid electrolyte is an efficient way to solve the contact issue.…”

Section: Overview Of the Computational Methodsmentioning

confidence: 99%

Computational Auxiliary for the Progress of Sodium-Ion Solid-State Electrolytes

et al. 2021

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All-solid-state sodium batteries (ASSBs) have attracted ever-increasing attention due to their enhanced safety, high energy density, and the abundance of raw materials. One of the remaining key issues for the practical ASSB is the lack of good superionic and electrochemical stable solid-state electrolytes (SEs). Design and manufacturing specific functional materials used as high-performance SEs require an in-depth understanding of the transport mechanisms and electrochemical properties of fast sodium-ion conductors on an atomic level. On account of the continuous progress and development of computing and programming techniques, the advanced computational tools provide a powerful and convenient approach to exploit particular functional materials to achieve that aim. Herein, this review primarily focuses on the advanced computational methods and ion migration mechanisms of SEs. Second, we overview the recent progress on state-of-the-art solid sodium-ion conductors, including Na-β-alumina, sulfide-type, NASICON-type, and antiperovskite-type sodium-ion SEs. Finally, we outline the current challenges and future opportunities. Particularly, this review highlights the contributions of the computational studies and their complementarity with experiments in accelerating the study progress of high-performance sodium-ion SEs for ASSBs.

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An inorganic-rich SEI induced by LiNO₃ additive for a stable lithium metal anode in carbonate electrolyte

Abstract: The dissolution of LiNO3 in carbonate electrolytes is achieved by introducing pyridine as a new carrier solvent owing to its higher Gutmann donor number than NO3-. The Li metal anode...

Cited by 57 publications

References 23 publications

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Stabilizing Li Anodes in I₂ Steam to Tackle the Shuttling-Induced Depletion of an Iodide/Triiodide Redox Mediator in Li–O₂ Batteries with Suppressed Li Dendrite Growth

Computational Auxiliary for the Progress of Sodium-Ion Solid-State Electrolytes

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An inorganic-rich SEI induced by LiNO3 additive for a stable lithium metal anode in carbonate electrolyte

Abstract: The dissolution of LiNO3 in carbonate electrolytes is achieved by introducing pyridine as a new carrier solvent owing to its higher Gutmann donor number than NO3-. The Li metal anode...

Cited by 57 publications

References 23 publications

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO3-Based Electrolytes

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO3-Based Electrolytes

Stabilizing Li Anodes in I2 Steam to Tackle the Shuttling-Induced Depletion of an Iodide/Triiodide Redox Mediator in Li–O2 Batteries with Suppressed Li Dendrite Growth

Computational Auxiliary for the Progress of Sodium-Ion Solid-State Electrolytes

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Resources

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An inorganic-rich SEI induced by LiNO₃ additive for a stable lithium metal anode in carbonate electrolyte

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Dendrite-Free and Micron-Columnar Li Metal Deposited from LiNO₃-Based Electrolytes

Stabilizing Li Anodes in I₂ Steam to Tackle the Shuttling-Induced Depletion of an Iodide/Triiodide Redox Mediator in Li–O₂ Batteries with Suppressed Li Dendrite Growth