Effect of the defect densities of reduced graphene oxide network on the stability of lithium-metal anodes

Zhang, Huan; Huang, Meiling; Song, Jié; Sun, Daming; Qiao, Yingjun; Zhou, Xuemei; Ye, Changying; Liu, Wenping; Liu, Wenjing; Wei, Zhikai; Peng, Gongchang; Qu, Meizhen

doi:10.1016/j.mtcomm.2021.102276

Cited by 7 publications

(5 citation statements)

References 36 publications

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“…The C 1s spectra (Figures a and S8a) indicate a reduction in the C–C bond signals at 284.5 eV after the removal of the rGO coating. − The residual C signals under the surface are probably attributed to binders and conductive carbon additives. The Li 2 CO 3 signals at ∼289.3 eV, one of the surface SEI components, also decreases with increasing etch time. , The removal of the rGO layer reveals the evolution of Si 2p signals (Figures b and S8b), starting with the detection of Li x Si y O z at 101.1 eV from lithiation of the native SiO x oxide layer. − After 1.4 min of sputtering, the signal of Li x Si (98.1 eV) appears and intensifies with further etching. , The O 1s spectra (Figures c and S8c) further show the presence of Li x Si y O z forming high lithiated lithium silicate (Li 4 SiO 4 ) near the core and low lithiated lithium silicates (Li 2 Si 2 O 5 and Li 2 SiO 3 ) near the surface. − The interfacial inorganic SEI phases Li 2 O (528.1 eV in O 1s) and LiF (684.7 eV in F 1s) (Figures c- e , and S8c-S8e) are detected beneath the top surface, − with Si@rGO(S) showing a higher F content compared in Figure f, possibly due to abundant sheet-restacking derived defects in the small-sized rGO that promote LiF formation . The rigid and stable LiF-rich SEI in Si@rGO(S) is proposed to be a crucial factor contributing to its superior cycling stability in LIBs.…”

Section: Resultsmentioning

confidence: 96%

“… 25 − 27 The interfacial inorganic SEI phases Li 2 O (528.1 eV in O 1s) and LiF (684.7 eV in F 1s) ( Figures 6 c- 6 e , and S8c-S8e ) are detected beneath the top surface, 20 − 23 with Si@rGO(S) showing a higher F content compared in Figure 6 f, possibly due to abundant sheet-restacking derived defects in the small-sized rGO that promote LiF formation. 28 The rigid and stable LiF-rich SEI in Si@rGO(S) is proposed to be a crucial factor contributing to its superior cycling stability in LIBs. The distribution of inorganic SEI after cycling based on the XPS depth profile data demonstrates that both LiF and Li 2 O are spread throughout the composite after removal of the topmost organic SEI layer by sputtering, 18 , 23 indicating the inward growth of SEI during cycling.…”

Section: Resultsmentioning

confidence: 99%

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Tailoring the Size of Reduced Graphene Oxide Sheets to Fabricate Silicon Composite Anodes for Lithium-Ion Batteries

Liang,

Hsu,

2024

ACS Appl. Mater. Interfaces

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The integration of a silicon (Si) anode into lithium-ion batteries (LIBs) holds great promise for energy storage, but challenges arise from unstable electrochemical reactions and volume changes during cycling. This study investigates the influence of reduced graphene oxide (rGO) size on the performance of rGO-protected Si composite (Si@rGO) anodes. Two sizes of graphene oxide (GO(L) and GO(S)) are used to synthesize Si@rGO composites with a core–shell structure by spray drying and thermal reduction. Electrochemical evaluations show the advantages of the Si@rGO(S) anode with improved cycle life and cycling efficiency over Si@rGO(L) and pure Si. The Si@rGO(S) anode facilitates the formation of a stable LiF-rich solid electrolyte interface (SEI) after cycling, ensuring enhanced capacity retention and swelling control. Rate capability tests also demonstrate the superior high-power performance of Si@rGO(S) with low and stable resistances in Si@rGO(S) over extended cycles. This study provides critical insights into the tailoring of graphene-protected Si composites, highlighting the critical role of rGO size in shaping structural and electrochemical properties. The Si material wrapped by graphene with an optimal lateral size of graphene emerges as a promising candidate for high-performance LIB anodes, thereby advancing electrochemical energy storage technologies.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Tailoring the Size of Reduced Graphene Oxide Sheets to Fabricate Silicon Composite Anodes for Lithium-Ion Batteries

Liang,

Hsu,

2024

ACS Appl. Mater. Interfaces

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“…It was noteworthy that the NCM622||G−Au@3D−Cu/Li cell exhibited a low starting capacity during the cycling process, a low initial CE of 79.7 % and poor rate capabilities at different current densities, but possessed an ultra‐long cycling life and a good stability. That was because the outer graphene protective layer within the G−Au@3D−Cu consumed a part of active Li, leading to the irreversible Li loss but forming a stable SEI [29] . In addition, the material level energy density (based on the mass loading of cathode) of NCM622||Au@3D−Cu/Li cell at 0.5 C/1 C was approximately 461.8 Wh kg −1 (Table S6, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…That was because the outer graphene protective layer within the GÀ Au@3DÀ Cu consumed a part of active Li, leading to the irreversible Li loss but forming a stable SEI. [29] In addition, the material level energy density (based on the mass loading of cathode) of NCM622 j j Au@3DÀ Cu/Li cell at 0.5 C/1 C was approximately 461.8 Wh kg À 1 (Table S6, Supporting Information).…”

Section: Chemistry-a European Journalmentioning

confidence: 99%

Graphene‐Enabled Electric‐Field Regulation and Ionic Redistribution Around Lithiophilic Aurum Nanoparticles Toward a Dendrite‐Free and 2000‐Cycle‐Life Lithium Metal Battery

Yan

Zhang

et al. 2022

Chemistry A European J

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Lithium metal batteries (LMBs) have attracted extensive attention owing to their high energy density. However, the uncontrolled volume changes and serious dendrite growth of the Li metal anode have hindered their commercialization. Herein, a three‐dimensional Cu foam decorated with Au nanoparticles and conformal graphene layer was designed to tune the Li plating/stripping behaviors. The 3D−Cu conductive host anchored by lithiophilic Au nanoparticles can effectively alleviate the volume expansion caused by the continuous plating/stripping of Li and reduce the nucleation energy barrier. Notably, the conductive graphene not only facilitates the transfer of electrons, but also acts as an ionic rectifier, thereby avoiding the aggregation of local current density and Li+ ions around Au nanoparticles and enabling the uniform Li+ flux. As a result, the G−Au@3D−Cu/Li anode ensures the non‐dendritic and homogeneous Li+ plating/stripping. Electrochemical results show that the symmetric G−Au@3D−Cu/Li cell delivers a low voltage hysteresis of 110 mV after 1000 h at 1 mA cm−2. Matched with a layered LiNi0.6Co0.2Mn0.2O2 cathode, the NCM622||G−Au@3D−Cu/Li full cell exhibits a long cycle life of 2000 cycles and an ultra‐low capacity decay rate (0.01 % per cycle).

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“…Much efforts have been devoted to using graphene with or without modification as the robust current collectors/hosts for highperformance LMAs. [60][61][62][63][64][65][66][67][68] Cui's group reported a feasible composite LMA constructed by infusing molten Li into an reduced graphene oxide (rGO) film with uniform nanogaps. [60] The periodic stacking of nanoscale Li and rGO with layer structure rendered the proposed LMAs excellent mechanical flexibility with low dimensional variation (∼20%) during Li stripping/plating.…”

Section: D Carbon Sheets/graphene For Lmasmentioning

confidence: 99%

Recent Advances in Carbon‐Based Current Collectors/Hosts for Alkali Metal Anodes

Wang

Song

Huang

et al. 2023

Energy & Environ Materials

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The urgent demand for high‐energy‐density storage systems evokes the research upsurge on the alkali metal batteries with high theoretical capacities. However, the utilization of alkali metal anodes, including Li, Na, and K, is significantly hindered by notorious dendrite growth, undesirable corrosion, and unstable solid electrolyte interface. In order to resolve these issues, the carbon materials for the rational design of current collector/host that can regulate the plating/stripping behavior of alkali metal have been exploited. These carbon‐based current collectors/hosts are featured with many pivotal advantages, including mechanical integrity to accommodate the volume change, superior electronic/ionic conductivity, large available surface area, and rich functionalization chemistries to increase the affinity to alkali metal. In this review, the recent progress on various dimensional carbon‐based current collectors/hosts with different chemical components in stabilizing the alkali metal anodes through the regulation of initial deposition and subsequent growth behavior during plating/stripping process is provided. The nanostructured carbon scaffolds with self‐affinity to alkali metals, as well as the carbon frameworks with internal/external affinitive sites to alkali metals, catalogued by various dimensions, are discussed in this review. Therefore, these appealing strategies based on the carbon‐based current collectors/hosts can provide a paradigm for the realization of high‐energy‐density alkali metal batteries.

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Effect of the defect densities of reduced graphene oxide network on the stability of lithium-metal anodes

Cited by 7 publications

References 36 publications

Tailoring the Size of Reduced Graphene Oxide Sheets to Fabricate Silicon Composite Anodes for Lithium-Ion Batteries

Tailoring the Size of Reduced Graphene Oxide Sheets to Fabricate Silicon Composite Anodes for Lithium-Ion Batteries

Graphene‐Enabled Electric‐Field Regulation and Ionic Redistribution Around Lithiophilic Aurum Nanoparticles Toward a Dendrite‐Free and 2000‐Cycle‐Life Lithium Metal Battery

Recent Advances in Carbon‐Based Current Collectors/Hosts for Alkali Metal Anodes

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