Effect of electrolyte on the nanostructure of the solid electrolyte interphase (SEI) and performance of lithium metal anodes

Jurng, Sunhyung; Brown, Zachary L.; Kim, Jiyeon; Lucht, Brett L.

doi:10.1039/c8ee00364e

Cited by 320 publications

(343 citation statements)

References 53 publications

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“…It results from the decomposition of electrolyte components (salt ions, solvents molecules, and functional additives), which forms a passivation layer on the surface of electrode materials. [27][28][29][30] Recently, considerable effort has been focused on using high concentration electrolytes to restrain the decomposition of the solvent molecules. A compact, thin, and passivating SEI is necessary to enable the long-term operation of batteries beyond the thermodynamic limits of electrolytes, as is the case for the commercial graphite anode.…”

Section: Introductionmentioning

confidence: 99%

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

Xiong

Zhou

et al. 2019

Advanced Energy Materials

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Alloy materials such as Si and Ge are attractive as high‐capacity anodes for rechargeable batteries, but such anodes undergo severe capacity degradation during discharge–charge processes. Compared to the over‐emphasized efforts on the electrode structure design to mitigate the volume changes, understanding and engineering of the solid‐electrolyte interphase (SEI) are significantly lacking. This work demonstrates that modifying the surface of alloy‐based anode materials by building an ultraconformal layer of Sb can significantly enhance their structural and interfacial stability during cycling. Combined experimental and theoretical studies consistently reveal that the ultraconformal Sb layer is dynamically converted to Li3Sb during cycling, which can selectively adsorb and catalytically decompose electrolyte additives to form a robust, thin, and dense LiF‐dominated SEI, and simultaneously restrain the decomposition of electrolyte solvents. Hence, the Sb‐coated porous Ge electrode delivers much higher initial Coulombic efficiency of 85% and higher reversible capacity of 1046 mAh g−1 after 200 cycles at 500 mA g−1, compared to only 72% and 170 mAh g−1 for bare porous Ge. The present finding has indicated that tailoring surface structures of electrode materials is an appealing approach to construct a robust SEI and achieve long‐term cycling stability for alloy‐based anode materials.

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Section: Introductionmentioning

confidence: 99%

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

Xiong

Zhou

et al. 2019

Advanced Energy Materials

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“…For several decades, soaring attention to LMB systems has spurred innumerable efforts to address the issues of Li dendritic growth. Electrolyte components or additives that stabilize the SEI layers between an electrolyte and a Li‐metal anode have been investigated 12–15. In addition, a modified artificial SEI layer has been effectively employed as a protective layer to prevent dendrite propagation 16–21.…”

Section: Introductionmentioning

confidence: 99%

“…Electrolyte components or additives that stabilize the SEI layers between an electrolyte and a Li-metal anode have been investigated. [12][13][14][15] In addition, a modified artificial SEI layer has been effectively employed as a protective layer to prevent dendrite propagation. [16][17][18][19][20][21] One approach is to suppress Li dendrite penetration by using a solid-state electrolyte with a high elastic modulus.…”

mentioning

confidence: 99%

Electrical Conductivity Gradient Based on Heterofibrous Scaffolds for Stable Lithium‐Metal Batteries

Hong

Jung

Kim

et al. 2020

Adv Funct Materials

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The inability to guide the nucleation locations of electrochemically deposited Li has long been considered the main factor limiting the utilization of high‐energy‐density Li‐metal batteries. In this study, an electrical conductivity gradient interfacial host comprising 1D high conductivity copper nanowires and nanocellulose insulating layers is used in stable Li‐metal anodes. The conductivity gradient system guides the nucleation sites of Li‐metal to be directed during electrochemical plating. Additionally, the controlled parameter of the intermediate layer affects the highly stable Li‐metal plating. The electrochemical behavior is confirmed through experiments associated with the COMSOL Multiphysics simulation data. The distributed Li‐ion reaction flux resulting from the controlled electrical conductivity enables stable cycling for more than 250 cycles at 1 mA cm−2. The gradient system effectively suppresses dendrite growth even at a high current density of 5 mA cm−2 and ensures Li plating and stripping with ultra‐long‐term stability. To demonstrate the high‐energy‐density full‐cell application of the developed anode, it is paired with the LiNi0.8Co0.1Mn0.1O2 cathode. The cells demonstrate a high capacity retention of 90% with an extremely high Coulombic efficiency of 99.8% over 100 cycles. These results shed light on the formidable challenges involved in exploiting the engineering aspects of high‐energy‐density Li‐metal batteries.

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“…For instance, engineering electrolytes by employings olid electrolytes or by using additives to improve the uniformity at the in situ formed solid electrolyte interface (SEI) can suppress Li dendrite growth. [8] Guiding Li ion flux by creatingp atterned nanostructures to ensure uniform Li deposition is beneficial;f or instance, the incorporation of 2D boron nitride nanoflakes substantially improves the Li + transferencen umber and suppressesL id endrite formation. [7] Moreover,t he underlying mechanism of how the electrolyte and the electrode compositions influence the formation and the morphology of the SEI layer is not clear,preventingt he reproducible massive-scalea pplication.…”

mentioning

confidence: 99%

“…[7] Moreover,t he underlying mechanism of how the electrolyte and the electrode compositions influence the formation and the morphology of the SEI layer is not clear,preventingt he reproducible massive-scalea pplication. [8] Guiding Li ion flux by creatingp atterned nanostructures to ensure uniform Li deposition is beneficial;f or instance, the incorporation of 2D boron nitride nanoflakes substantially improves the Li + transferencen umber and suppressesL id endrite formation. [9] However,t he fabrication process was complicated and hence expensive.…”

mentioning

confidence: 99%

An Interfacial Layer Based on Polymers of Intrinsic Microporosity to Suppress Dendrite Growth on Li Metal Anodes

Shang

et al. 2019

Chemistry A European J

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The performance and safety of lithium (Li)m etal batteries can be compromised owing to the formation of Li dendrites. Here, the use of ap olymer of intrinsic microporosity (PIM) is reporteda safeasible and robust interfacial layer that inhibits dendrite growth. The PIM demonstrates excellent film-forming ability,e lectrochemical stability,s trong adhesion to ac opper metal electrode, and outstanding mechanical flexibility so that it relieves the stress of structural changes produced by reversible lithiation. Importantly,t he porous structure of the PIM, which guides Li flux to obtain uniform deposition, and its strong mechanical strength combine to suppress dendrite growth. Hence, the electrochemical performance of the anode is significantly enhanced, promising excellentp erformance and extendedc ycle lifetime for Li metal batteries.Lithium (Li)b atteries have been proposed to meet the ever-increasingd emand for effective energy storage required for portable electronics and electric vehicles owing to their high energy density. [1] Considerable efforts have been devoted to improving the performance of Li batteries. Particularly,t he anode,w hich plays an important role in determining the overall performance of ab attery,h as attracted more research interest. Li metal is considered to be an exceptional anode material for the next generation of high energy density batteries,s uch

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Effect of electrolyte on the nanostructure of the solid electrolyte interphase (SEI) and performance of lithium metal anodes

Abstract: Nanostructure of the SEI may be as important as the molecular composition of the SEI for good cycling performance of lithium metal anodes.

Cited by 320 publications

References 53 publications

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

Boosting Superior Lithium Storage Performance of Alloy‐Based Anode Materials via Ultraconformal Sb Coating–Derived Favorable Solid‐Electrolyte Interphase

Electrical Conductivity Gradient Based on Heterofibrous Scaffolds for Stable Lithium‐Metal Batteries

An Interfacial Layer Based on Polymers of Intrinsic Microporosity to Suppress Dendrite Growth on Li Metal Anodes

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