Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

Liu, Song; Wang, Guan; Hou, Hongying; Liu, Xianxi; Duan, Jianguo; Liao, Qishu

doi:10.1016/j.diamond.2016.06.013

Cited by 11 publications

(2 citation statements)

References 37 publications

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“…It was reported that pyrrolic N and pyridinic N may offer the additional active sites for Li-storage, thereby enhancing Li-storage capacity (Zheng et al, 2014). In the case of O 1s spectrum in Figure 5D, four peaks at 531.0, 532.3, (Saravanan and Kalaiselvi, 2015;Liu et al, 2016b). The residual O-containing functional groups (C=O, C-O, and O=C-O) may also increase the defects, the disorder or the local electron density beneficial for Li-storage, as reported elsewhere (Bhattacharjya et al, 2014).…”

Section: Xps Analysismentioning

confidence: 92%

The Recovery of the Waste Cigarette Butts for N-Doped Carbon Anode in Lithium Ion Battery

Hou

Liu

et al. 2018

Front. Mater.

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As one of the common life garbages, about 4.5 trillion waste cigarette butts are produced and randomly discarded every year due to the addiction to the nicotine and the need of the social intercourse. Such a treatment would result in the waste of the resources and the environmental pollution if they weren't reasonably recycled in time. Herein, the waste cigarette butts were recycled in form of N-doped carbon powders with high economic value-added via one-step facile carbonization at 800 • C for 2 h in the inert N 2 atmosphere. The waste-cigarette-butts-derived black carbon powders were characterized by scanning electron microscope (SEM), N 2 adsorption/desorption, and X-ray photoelectron spectroscopy (XPS). Furthermore, the corresponding electrochemical performances as the anode in lithium ion battery (LIB) were also investigated by galvanostatic charge/discharge, cyclic voltammetry (CV), and alternating current (AC) impedance. The results suggested that the recycled N-doped waste cigarette butts carbon (WCBC) powders consisted of major carbon and minor residual N-containing and O-containing functional groups, and the corresponding specific surface area was about 1,285 m 2 •g −1. Furthermore, the reversible specific discharge capacity was about 528 mAh•g −1 for 100 cycles at 25 mA•g −1 and about 151 mAh•g −1 even at 2,000 mA•g −1 for 2,500 cycles. Additionally, full cell performances were also satisfactory, indicating high feasibility. N-doping effect (such as additional active sites and higher electronic conductivity) and the residual O-containing functional groups may be responsible for the satisfactory electrochemical performances, which offered good inspiration and strategy to develop the green energy and circular economy.

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Section: Xps Analysismentioning

confidence: 92%

The Recovery of the Waste Cigarette Butts for N-Doped Carbon Anode in Lithium Ion Battery

Hou

Liu

et al. 2018

Front. Mater.

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“…Very recently, the other approach to inhibit Li dendrites by modifying the current collector has been widely discussed. It was found that by creating the CuO nanostructure on the Cu surface as a current collector, exhibits an improved capacity for Li batteries (Liu et al, 2016; So et al, 2018; Zhang et al, 2018). Moreover, the 3D conductive framework as a current collector can suppress the growth of dendrites, because of its large specific surface and low local current density for the Li metal anode (Xie et al, 2016; Yun et al, 2016; Li Q. et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Graphene-Modified 3D Copper Foam Current Collector for Dendrite-Free Lithium Deposition

Dang

Bai

et al. 2019

Front. Chem.

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Lithium (Li) metal is regarded as the ideal anode for rechargeable Li-metal batteries such as Li-S and Li-air batteries. A series of problems caused by Li dendrites, such as low Coulombic efficiency (CE) and a short circuit, have limited the application of Li-metal batteries. In this study, a graphene-modified three-dimensional (3D) Copper (Cu) current collector is addressed to enable dendrite-free Li deposition. After Cu foam is immersed into graphene oxide (GO) suspension, a spontaneous reduction of GO, induced by Cu, generates reduced graphene oxide on a 3D Cu (rGO@Cu) substrate. The rGO@Cu foam not only provides large surface area to accommodate Li deposition for lowering the local effective current density, but also forms a rGO protective layer to effectively control the growth of Li dendrites. As current collector, the rGO@Cu foam shows superior properties than commercial Cu foam and planar Cu foil in terms of cycling stability and CE. The rGO@Cu foam delivers a CE as high as 98.5% for over 350 cycles at the current density of 1 mA cm−2. Furthermore, the full cell using LiFePO4 as cathode and Li metal as anode with rGO@Cu foam as current collector (LiFePO4/rGO@Cu-Li) is assembled to prove the admirable capacities and indicates commercialization of Li-metal batteries.

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On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

Sun

et al. 2023

Advanced Materials

104

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Graphene with fascinating physicochemical properties has been regarded as one of the most promising candidates to substitute the commercial graphite anode for next-generation lithium-ion batteries (LIBs). [1] As originally suggested by Dahn's group, Li ions can be adsorbed on each side of graphene, forming a Li 2 C 6 stoichiometry with a theoretical specific capacity of 744 mAh g −1 , twice that of graphite (372 mAh g −1 of the first-stage LiC 6 intercalation compound). [2] However, in situ Raman spectroscopy reveals that it is difficult to achieve high Li coverage on graphene because of the low binding energy of Li with carbon and the strong Coulombic repulsion between the adsorbed Li ions. [3] Using density functional theory (DFT) calculations, Lee et al. also found that Li cannot reside on the surface of pristine graphene since its adsorption energy is positive for the entire range of Li content. [4] Therefore, the Li storage capacity of pristine graphene is far from its theoretical value, and is even inferior to that of graphite. Accordingly, it was proposed that defective graphene presents superior Li adsorption because of the increased charge transfer between Li and the defects, and moreover, the specific capacity rises with the increase of defects densities. [5] In the case of the maximum divacancy defect density, the Li storage capacity can reach up to 1675 mAh g −1 . In this regard, reduced graphene oxide (rGO), a form of graphene prepared by a chemical oxidation-exfoliation-reduction process, has been proven to be a potential anode by virtue of its abundant defects and the residual O-containing functional groups. [6] On the other hand, rGO also exhibits the advantages of mass production from the reduction of graphene oxide (GO) with contained costs, which is an essential step for practical applications. [7] As a result, rGO anode is more frequently studied as compared to its pristine graphene counterpart.The groundbreaking work of graphene anodes was reported in 2008 by Honma's group, who demonstrated that the incorporation of carbonaceous materials, i.e., carbon nanotubes (CNTs) and fullerenes (C 60 ), into graphene sheets can efficiently expand the interlayer spacing, thus higher Li storage capacities. [8] Soon Graphene has long been recognized as a potential anode for next-generation lithium-ion batteries (LIBs). The past decade has witnessed the rapid advancement of graphene anodes, and considerable breakthroughs are achieved so far. In this review, the aim is to provide a research roadmap of graphene anodes toward practical LIBs. The Li storage mechanism of graphene is started with and then the approaches to improve its electrochemical performance are comprehensively summarized. First, morphologically engineered graphene anodes with porous, spheric, ribboned, defective and holey structures display improved capacity and rate performance owing to their highly accessible surface area, interconnected diffusion channels, and sufficient active sites. Surface-modified graphene anodes with less aggreg...

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Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

Cited by 11 publications

References 37 publications

The Recovery of the Waste Cigarette Butts for N-Doped Carbon Anode in Lithium Ion Battery

The Recovery of the Waste Cigarette Butts for N-Doped Carbon Anode in Lithium Ion Battery

Graphene-Modified 3D Copper Foam Current Collector for Dendrite-Free Lithium Deposition

On the Road to the Frontiers of Lithium‐Ion Batteries: A Review and Outlook of Graphene Anodes

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