Promoting the reversibility of lithium ion/lithium metal hybrid graphite anode by regulating solid electrolyte interface

Wang, Shuwei; Liu, Dongqing; Cai, Xingke; Zhang, Lihan; Liu, Yuanming; Qin, Xianying; Zhao, Rui; Zeng, Xiaojie; Han, Cuiping; Zhan, Chun; Kang, Feiyu; Li, Baohua

doi:10.1016/j.nanoen.2021.106510

Cited by 28 publications

(13 citation statements)

References 37 publications

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“…The initial Li-ion intercalation and Li deposition behaviors of MCMB and C@Ag-75 hybrid anode with the same areal loading of 2.1 mg cm –2 (0.67 mA h cm –2 ) were investigated and compared (Figure ). Figure a,b shows the typical capacity–voltage curves for Li inserting and plating in the hybrid anode, respectively. − The first discharge curves of the two hybrid anodes are consistent with the literature, which can be generally divided into two stages. It is acknowledged that only Li + intercalation into MCMBs occurs when the operating voltage is above 0 V; plating is energetically not favorable (i.e., thermodynamically not possible).…”

Section: Resultssupporting

confidence: 80%

Ag Nanoparticle-Decorated Mesocarbon Microbeads for Homogeneous Lithium Deposition toward Stable Hybrid Anodes

Dong

Zhao

Xia

et al. 2022

ACS Appl. Nano Mater.

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Transforming conventional Li-ion batteries into lithium-ion/lithium metal hybrid batteries by curtailing the N/P (anode lithiation capacity/cathode delithiation capacity) ratio is an effective approach to improve the energy density. The lower N/P ratio brings more capacity in the form of lithium metal, leading to more serious inhomogeneous plating/stripping of Li and active Li consumption. Therefore, it is of great importance to regulate uniform Li plating/stripping in the low N/P ratio condition for improving the reversibility of the batteries. This work proposes the surface modification of mesocarbon microbeads (MCMBs) with Ag nanoparticles as lithiophilic seeds that are capable of diminishing the nucleation overpotential of lithium and directing uniform and conformal Li deposition on the surface of MCMB particles, which prevents dendrite growth and agglomeration of dead Li on top of the anode. As a result, the hybrid anode using Ag-modified MCMBs can remain stable for more than 150 charge/discharge cycles in half-cells under an ultra-low N/P ratio of 0.33. Meanwhile, the full cell using this hybrid anode maintains 80.1% capacity after 130 cycles at 0.5 C under a low N/P ratio of 0.67, while the capacity retention of the cell using bare MCMBs quickly drops to 13.2% only after 100 cycles.

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Section: Resultssupporting

confidence: 80%

Ag Nanoparticle-Decorated Mesocarbon Microbeads for Homogeneous Lithium Deposition toward Stable Hybrid Anodes

Dong

Zhao

Xia

et al. 2022

ACS Appl. Nano Mater.

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“…The Li plating amount can be regulated by controlling the upper cut‐off voltages to prolong the cycle life of this hybrid cell, that is, charging the cell to high voltage only when a higher capacity is required. Wang et al [ 178 ] further studied the impact of different Li salts such as LiPF 6 and LiFSI on SEI evolution of hybrid graphite–Li‐metal anode in carbonate electrolyte by in situ electrochemical atomic force microscopy (EC‐AFM). It is demonstrated that the LiFSI is a more favorable salt for the combined Li intercalation and plating anode due to the uniform, dense, and mechanically strong SEI formed on the graphite surface.…”

Section: Insights Of Graphite In Li‐metal and All‐solid‐state Batteriesmentioning

confidence: 99%

“…Interestingly, recent studies have shown that the Li plating in the pores of the graphite helps overcome the capacity limit of graphite anode after elaborate design, where the additional capacity is contributed by the reversible plating/stripping of Li metal. [47,48,59,[176][177][178][179][180] Thus, some so-called hybrid Li-ion/Li-metal cells with hybrid graphite-Li-metal anodes have been proposed and demonstrated, which can efficiently improve the energy density of graphite-based full batteries with a long cycling life.…”

Section: Graphite As LI Plating Host For Li-metal Cellsmentioning

confidence: 99%

Revisiting the Roles of Natural Graphite in Ongoing Lithium‐Ion Batteries

et al. 2022

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namely natural graphite (NG) and artificial graphite. NG originates from organics rich in carbon under long-term hightemperature and high-pressure geological environments, while artificial graphite is obtained by artificial carbonization and graphitization of organics under high temperature. The main types of NG include flake graphite (FG) and microcrystalline graphite (MG). NG, such as flake FG, delivers high capacity owing to its larger anisotropic crystalline domains, while the artificial graphite with higher purity and larger fraction of edge planes caused by smaller crystalline size presents excellent electrochemical kinetics, long cycle life, but low initial Coulombic efficiency (ICE). [9,10] NG has drawn great attention as anode material in LIBs due to the outstanding features such as high energy density, excellent processability, and low cost. [11,12] By 2020, NG accounted for 39% of the anode material market compared with 58% of artificial graphite. [13] It should be noted that the market share of NG will continue to grow due to the requirements for reducing CO 2 emission and environmental footprint since the production of artificial graphite is energy-intensive, high cost, and time consuming. [14] China is rich in resources of NG and is the world's largest exporter of NG. [15] FG shows a typical layered and anisotropic structure in which large graphite crystals stack together within orientation. [16] When used as an anode material, FG presents high specific capacity and ICE, but poor cyclic stability due to the structure destruction caused by volume expansion. [17,18] MG presents isotropic structure, consisting of graphitic microcrystals randomly stacked together. The MG anode presents better cyclic stability and outstanding rate performance due to the small volume expansion and shortened lithium ion (Li + ) diffusion distance, but low ICE owing to the large surface area. [16] It should be noted that our group invented NG-based materials as early as 1992, [19][20][21] and introduced such low-cost materials in many aspects of applications, and finally into LIBs as commercial anodes in 1997. [22][23][24] To improve its electrochemical performance, surface modification such as carbon coating is essential for NG to form a stable solid electrolyte interface (SEI) layer, which can reduce the initial irreversible capacity, enhance the cyclability, and improve the low-temperature as well as thermal stability. [25] Besides, the NG can be hybridized with other carbon materials, including carbon nanotube (CNT), [26][27][28] Graphite, commonly including artificial graphite and natural graphite (NG), possesses a relatively high theoretical capacity of 372 mA h g -1 and appropriate lithiation/de-lithiation potential, and has been extensively used as the anode of lithium-ion batteries (LIBs). With the requirements of reducing CO 2 emission to achieve carbon neutral, the market share of NG anode will continue to grow due to its excellent processability and low production energy consumption. NG, which is abundant in Chi...

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“…4 Voltage-capacity curves of (a) porous graphite lamina (PGL) and planar Cu electrodes at the lithiation and plating process; scanning electron microscopy images of (b) porous graphite lamina and porous lithiated graphite lamina; in situ EC-AFM observation of lithium (c) intercalation and (d) plating processes on the HOPG hybrid anode. 94 organic-inorganic components is flexible and stable, uniform and dense, and lithium would not be extra consumed by the stripped SEI and was evenly plated and stripped with good reversibility.…”

Section: Graphite and Graphite-like Materials For LI Hostmentioning

confidence: 99%

“…The hierarchical behavior of graphite at different charge–discharge rates is highly velocity-dependent and strongly hysteretic. Wang et al 94 used a highly oriented pyrolytic graphite (HOPG) as a model to investigate the complex process of intercalation, plating, stripping, and deintercalation of graphite-based lithium ion/metal anode using a series of in situ methods. As shown in Fig.…”

Section: Carbon Materials As LI Metal Hostmentioning

confidence: 99%

Strategies and challenges of carbon materials in the practical applications of lithium metal anode: a review

Jiang

Meng

et al. 2022

Phys. Chem. Chem. Phys.

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Promoting the reversibility of lithium ion/lithium metal hybrid graphite anode by regulating solid electrolyte interface

Cited by 28 publications

References 37 publications

Ag Nanoparticle-Decorated Mesocarbon Microbeads for Homogeneous Lithium Deposition toward Stable Hybrid Anodes

Ag Nanoparticle-Decorated Mesocarbon Microbeads for Homogeneous Lithium Deposition toward Stable Hybrid Anodes

Revisiting the Roles of Natural Graphite in Ongoing Lithium‐Ion Batteries

Strategies and challenges of carbon materials in the practical applications of lithium metal anode: a review

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