Achieve Stable Lithium Metal Anode by Sulfurized-Polyacrylonitrile Modified Separator for High-Performance Lithium Batteries

Zhang, Tao; Li, Xiaoxuan; Miao, Xianguang; Sun, Rui; Li, Jiafeng; Zhang, Zhiwei; Wang, Rutao; Wang, Chengxiang; Li, Zhaoqiang; Yin, Longwei

doi:10.1021/acsami.2c00768

Cited by 20 publications

(15 citation statements)

References 60 publications

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“…Compared with reported symmetric cells with the electrolyte but without LiNO 3 additives, the constructed anode also shows better or comparable performances. 48,62,66,67 The importance of the PVDF/LiF layer is further confirmed with the Li||Li symmetric cells with the PVDF/LiF protective layer only. The PVDF/LiF−Li||PVDF/LiF−Li symmetric cell shows a lower polarization voltage and a longer cycle life than the bare Li||Li symmetric cell (Figure S12), indicating that the integration of the spongelike lithiophilic Ag layer and the PVDF/LiF protective layer effectively improves the cyclability and reduces the polarization voltage, hence leading to excellent electrochemical performances.…”

Section: Resultsmentioning

confidence: 99%

“…The PVDF/LiF–Ag@Li||PVDF/LiF–Ag@Li symmetric cells show a small polarization of ∼35 mV in the time range of 300–305 h, which is much lower than bare Li||Li (∼200 mV) and Ag@Li||Ag@Li (∼60 mV) symmetric cells. Compared with reported symmetric cells with the electrolyte but without LiNO 3 additives, the constructed anode also shows better or comparable performances. ,,, …”

Section: Resultsmentioning

confidence: 99%

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Engineering Lithiophilic Silver Sponge Integrated with Ion-Conductive PVDF/LiF Protective Layer for Dendrite-Free and High-Performance Lithium Metal Batteries

Liu

Chang

Yang

et al. 2022

ACS Appl. Energy Mater.

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Although lithium metal anode has attracted much attention as the "Holy Grail" because of its high specific capacity and the lowest reduction potential, its practical applications are largely hindered by the short circuit resulted from the unfavorable growth of lithium dendrites and the unstable interface caused by the parasitic reactions between the highly active lithium metal and the nonaqueous liquid electrolyte. Herein, a multifunctional bilayer structure integrating the spongelike lithiophilic Ag layer and the ionconductive polyvinylidene difluoride (PVDF)/LiF layer is fabricated for highperformance lithium metal anode. The porous lithiophilic Ag sponge layer provides abundant lithium nucleation sites and deposition space for the uniform growth of lithium, thereby endowing the compact deposition of lithium without the overgrowth of lithium dendrites. The ion-conductive and electronically insulating PVDF/LiF layer improves the lithium-ion transfer and guarantees the interface stability by suppressing the parasitic reactions between the lithium metal and the nonaqueous electrolyte. Moreover, the artificial PVDF/LiF layer can avoid the probability of unfavorable contact between dendrites and the cathode, even though the spongelike Ag layer is "swollen" by the Li metal. Therefore, the PVDF/LiF−Ag@Cu||Li half cell exhibits a more stable average Coulombic efficiency of ∼98.2% and a longer cycle life than Cu||Li and Ag@Cu||Li half cells. Additionally, the symmetric cell of PVDF/LiF−Ag@Li||PVDF/LiF−Ag@Li exhibits a longer cycling time without short circuit and still retains a lower polarization of ∼35 mV for at least 700 h than compared samples. The PVDF/LiF−Ag@Li||LiFePO 4 full cell exhibits the longest cycle life, the best rate performance, and the highest capacity retention, especially with a high LiFePO 4 mass loading of ∼10 mg cm −2 .

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Engineering Lithiophilic Silver Sponge Integrated with Ion-Conductive PVDF/LiF Protective Layer for Dendrite-Free and High-Performance Lithium Metal Batteries

Liu

Chang

Yang

et al. 2022

ACS Appl. Energy Mater.

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“…This is a consequence of the dendritic growth of Li deposits and the subsequent SEI cracking/repairing process, which leads to the accumulation of a thick SEI layer. [49,50] In contrast, the use of the CPP separator reduced the Li consumption and electrolyte decomposition in the Li/Li symmetric cells. The effectiveness of the CPP separator for Li plating and stripping on a Cu substrate was examined (Figure 5).…”

Section: Effect Of the Cpp Separator On The Cyclability Of LI Metal E...mentioning

confidence: 99%

Flattening of Lithium Plating in Carbonate Electrolytes Enabled by All‐In‐One Separator

Kim

Park

et al. 2023

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vs SHE) and tenfold increased theoretical specific capacity (3860 mA h g −1 ) [6,7] than graphite anode (376 mA h g −1 ). [8][9][10] Despite these fundamental advantages, Li metal anodes still suffer from the inevitable formation of Li dendrites, resulting in reduced long-term performance and undesirable internal short circuits. [11][12][13][14] Thus, it is essential to develop a novel strategy to effectively suppress the formation of Li dendrites by manipulating the nucleation and growth behavior of Li deposits during cycling.According to Sand's time model, increasing the Li + transference number is a feasible strategy to reduce the concentration overpotential in the electrolyte and to suppress the diffusion-limited growth of Li dendrites. [15][16][17][18][19] The most intuitive approach to achieve this is the modification of the electrolyte composition; however, there are few electrolyte compositions that can fulfill the various requirements of LMBs in terms of ionic conductivity, chemical/electrochemical stability, and safety. Instead, introducing functional materials with high polarity onto the separator provides a practical approach for improving the Li + transference number because it allows a direct interaction between functional materials and electrolyte solvents. [20][21][22][23][24] However, it would be difficult to completely alter the inherent properties of the separator via a conventional coating process, whichThe uncontrollable dendritic growth of metallic lithium during repeated cycling in carbonate electrolytes is a crucial obstacle hindering the practical use of Li-metal batteries (LMBs). Among numerous approaches proposed to mitigate the intrinsic constraints of Li metal, the design of a functional separator is an attractive approach to effectively suppress the growth of Li dendrites because direct contact with both the Li metal surface and the electrolyte is maintained. Here, a newly designed all-in-one separator containing bifunctional CaCO 3 nanoparticles (CPP separator) is proposed to achieve the flattening of Li deposits on the Li electrode. Strong interactions between the highly polar CaCO 3 nanoparticles and the polar solvent reduces the ionic radius of the Li + -solvent complex, thus increasing the Li + transference number and leading to a reduced concentration overpotential in the electrolyte-filled separator. Furthermore, the integration of CaCO 3 nanoparticles into the separator induces the spontaneous formation of mechanically-strong and lithiophilic CaLi 2 at the Li/separator interface, which effectively decreases the nucleation overpotential toward Li plating. As a result, the Li deposits exhibit dendrite-free planar morphologies, thus enabling excellent cycling performance in LMBs configured with a high-Ni cathode in a carbonate electrolyte under practical operating conditions.

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“…[1][2][3][4][5] Nevertheless, the Li anode faces the challenges of high chemical reactivity and uncontrollable dendrite growth, which will bring severe safety concerns of short circuits, especially in practical applications with high Li supply. [6][7][8][9][10][11] Therefore, regulating and limiting Li dendrites' uncontrollable growth is of great urgency to achieve safe and high-energy density LMBs.…”

Section: Introductionmentioning

confidence: 99%

The Inducement and “Rejuvenation” of Li Dendrites by Space Confinement and Positive Fe/Co‐Sites

Liu

Dong

Wen

et al. 2023

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Achieve Stable Lithium Metal Anode by Sulfurized-Polyacrylonitrile Modified Separator for High-Performance Lithium Batteries

Cited by 20 publications

References 60 publications

Engineering Lithiophilic Silver Sponge Integrated with Ion-Conductive PVDF/LiF Protective Layer for Dendrite-Free and High-Performance Lithium Metal Batteries

Engineering Lithiophilic Silver Sponge Integrated with Ion-Conductive PVDF/LiF Protective Layer for Dendrite-Free and High-Performance Lithium Metal Batteries

Flattening of Lithium Plating in Carbonate Electrolytes Enabled by All‐In‐One Separator

The Inducement and “Rejuvenation” of Li Dendrites by Space Confinement and Positive Fe/Co‐Sites

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