An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode

Hu, Anjun; Chen, Wei; Du, Xuesen; Hu, Yin; Lei, Tianyu; Wang, Hongbo; Xue, Lanxin; Li, Yaoyao; Sun, He; Yan, Yan; Long, Jianping; Shu, Chaozhu; Zhu, Jing; Li, Baihai; Wang, Xianfu; Xiong, Jie

doi:10.1039/d1ee00508a

Cited by 427 publications

(263 citation statements)

References 42 publications

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“…The SEI layer reduced the continuous consumption of the reactive Li and electrolyte and further improved the utilization efficiency of Li and the cycling stability of the batteries. [ 54 ] The cycling stability of recent studies based on Li/ Li batteries is compared (see Table S1 for details, Supporting Information). The C‐2‐modified Cu foil employed in this work exhibits the highest cycling life (1300 h) at a current density of 3 mA cm −2 among various strategies such as artificial SEI layers, 3D hosts and electrolyte additive.…”

Section: Resultsmentioning

confidence: 99%

Rigid and Flexible SEI Layer Formed Over a Cross‐Linked Polymer for Enhanced Ultrathin Li Metal Anode Performance

Wang

Yang

Huang

et al. 2022

Advanced Energy Materials

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The design of the anode material is considered the core subject in manufacturing a battery system, among which, Li is a commonly used, ideal anode material. Normally, the electrolyte is decomposed on the Li metal anode to form a solid electrolyte interphase (SEI) layer. [4] Owing to this layer, the contact between the electrolyte and Li metal decreases, causing the batteries to be recyclable and efficient. During batteries cycling, however, a large volume expansion of the Li anode may lead to a rupture of the SEI layer, exposing fresh Li that could react with the electrolyte. The rupture of SEI therefore leads to a low coulombic efficiency (CE) and poor cycling stability. [5,6] Generally, the decomposition of Li salts in electrolytes results in the SEI layer that comprises inorganic compounds, while the electrolyte solvents are composed mainly of organic components. [7,8] Some researchers have reported that increasing the content of inorganics in the SEI layer is beneficial for improving its stability and mechanical strength. [9][10][11] Different strategies for modulating the Li anode interface were investigated, including the use of electrolyte additives and artificial SEI layers. [12][13][14][15][16][17][18] Among them, regulating the composition of the SEI layers by changing the solvation structure of Li + using electrolyte additives seemed simpler. [19] During the transfer of Li + through the SEI layer, Li + desolvation causes coordination anions and solvents to decompose and spontaneously form the SEI layer. [20][21][22][23] Unfortunately, most electrolyte additives themselves participate in the formation of the SEI layer. [24][25][26] Moreover, the effect of the additives gradually disappears owing to their continuous decomposition. By contrast, the artificial SEI layers, where extra protective layers are grafted directly onto the surface of Li metal, will not decompose significantly as the batteries cycle. Instead, the artificial SEI layer inhibits the growth of dendrite because of its specific mechanical properties. [27][28][29][30] In addition, it helps disperse Li + after passing through the membrane, homogenize the flux of Li + , and reduce the formation of dendrites. [31][32][33][34] Due to the remarkable effect of artificial layers, previous researches on the nature of the protective layers themselves are intense. [35][36][37][38][39] However, it should be noted that artificial layer has always a certain lifetime, and we suppose Li metal has been attracting considerable attention as the most promising anode material for application in next-generation Li rechargeable batteries. However, the instability of the formed solid electrolyte interphase (SEI) in the Li metal anode leads to a low coulombic efficiency (CE). Here, two kinds of synthesized polymer materials with different molecular configurations (chain and cross-linked), which are grafted as skins on Cu foils (current collectors), are reported. The interaction between the polymers and electrolyte solvent reduces the amount of the solvent used in...

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Section: Resultsmentioning

confidence: 99%

Rigid and Flexible SEI Layer Formed Over a Cross‐Linked Polymer for Enhanced Ultrathin Li Metal Anode Performance

Wang

Yang

Huang

et al. 2022

Advanced Energy Materials

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“…[ 31,32 ] In this sense, it is imperative and meaningful to lower the negative‐to‐positive (N/P) ratio to <5 in the pursuit of LMB commercialization, whereas the related investigations in this realm are still lacking to date. [ 33,34 ]…”

Section: Introductionmentioning

confidence: 99%

“…[31,32] In this sense, it is imperative and meaningful to lower the negative-to-positive (N/P) ratio to <5 in the pursuit of LMB commercialization, whereas the related investigations in this realm are still lacking to date. [33,34] Guided by the earlier considerations, we report herein a reformative current collector for Li metal anode, which is designed by in situ crafting the CuSe granule layer on the dealloyed Cu framework (D-Cu@CuSe). The dealloyed Cu skeleton that harnesses favorable porosity is beneficial to mitigating volume change and lowering local current density.…”

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confidence: 99%

Synergizing Conformal Lithiophilic Granule and Dealloyed Porous Skeleton toward Pragmatic Li Metal Anodes

et al. 2022

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Li metal is regarded as one of the most promising anodes for next‐generation rechargeable batteries. Nonetheless, infinite volume change and severe dendrite growth impede its practicability. To date, unremitting efforts have been devoted to stabilizing Li metal anode via the rational design of 3D current collectors. In this sense, optimizing Li nucleation behavior plays a pivotal role in alleviating the dendrite formation. Herein, a practically viable route is devised by in situ crafting lithiophilic CuSe granules on the dealloyed Cu skeleton (D‐Cu@CuSe). Persuasive electrochemical analysis and systematic theoretical calculation disclose the underlying Li nucleation mechanism on the CuSe overlayer. Impressively, the D‐Cu@CuSe‐Li symmetric cell can sustain a stable plating/stripping operation over 1000 h at a high depth of discharge at 62.5%. More crucially, when paired with high‐loading sulfur cathodes, D‐Cu@CuSe‐Li||S batteries harvest advanced areal capacity and stable cycling performance even under stringent working conditions of low negative‐to‐positive (N/P) (≈2) and electrolyte‐to‐sulfur (8 μL mgs−1) ratios. Overall, a fresh perspective into rationalizing current collector design is afforded, which extends Li utilization and cycling durability in the pursuit of pragmatic Li metal anodes.

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“…Similar behaviors can be observed in many previously reported works. [ 10,24 ] The uneven surface passivation layer, the ample hot sites (like valley or edge) of Li foil and the inhomogeneous electric field on the surface of Li foil induced by non‐uniform Li + ion flux in the electrolyte and SEI layer would cause uneven Li nucleation. And during the subsequent deposition process, the Li tends to plate on the initially deposited Li rather than on the passivation layer of Li foil with lower electronic conductivity.…”

Section: Resultsmentioning

confidence: 99%

Dendrite‐Free Reverse Lithium Deposition Induced by Ion Rectification Layer toward Superior Lithium Metal Batteries

Lin

Liu

Yan

et al. 2021

Adv Funct Materials

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Considerable endeavors are developed to suppress lithium (Li) dendrites and improve the cycling stability of Li metal batteries in order to promote their commercial application. Herein, continuous zinc (Zn) nanoparticles‐assembled film with homogenous nanopores is proposed as a modified layer for separator via a scalable method. The in situ formed LiZn alloy film during initial Li plating can serve as a Li+ ion rectification and lithiophilic layer to regulate the nucleation and reverse deposition of Li. When applied in Li|LiFePO4 full cells with traditional carbonate‐based electrolyte, the modified separator enables outstanding cycling stability of up to 350 cycles without capacity loss at a large rate of 5 C (3.4 mA cm−2) and a remarkable reversible capacity of 144 mAh g−1 after 120 cycles at a commercial mass loading as high as 19.72 mg cm−2. The excellent electrochemical performances are ascribed to the dendrite‐free reverse Li deposition induced by modified layer by means of its lithiophilic property for regulating homogeneous Li nucleation on the separator as well as its well‐distributed nanopores for homogenizing Li+ ion flux and enhancing electrolyte wetting.

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An artificial hybrid interphase for an ultrahigh-rate and practical lithium metal anode

Abstract: The solid-electrolyte interphase (SEI) layer is pivotal for the stable and rechargeable batteries especially under high rate. However, the mechanism of Li+ transport through the SEI has not been clearly...

Cited by 427 publications

References 42 publications

Rigid and Flexible SEI Layer Formed Over a Cross‐Linked Polymer for Enhanced Ultrathin Li Metal Anode Performance

Rigid and Flexible SEI Layer Formed Over a Cross‐Linked Polymer for Enhanced Ultrathin Li Metal Anode Performance

Synergizing Conformal Lithiophilic Granule and Dealloyed Porous Skeleton toward Pragmatic Li Metal Anodes

Dendrite‐Free Reverse Lithium Deposition Induced by Ion Rectification Layer toward Superior Lithium Metal Batteries

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