Collector and binder-free high quality graphene film as a high performance anode for lithium-ion batteries

Jiao, Liansheng; Sun, Zhonghui; Li, Hongyan; Li, Fenghua; Wu, Tongshun; Niu, Li

doi:10.1039/c6ra26111f

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…It is believed that the superior conductivity and abundant porous channels of the N-PGNS provide an intrinsic guarantee of fast transport of electrons and Li + within electrodes. It is found that the reversible specific capacity of the N-PGNS in this work is also higher than that of other graphene and N-doped graphene materials as reported previously (see table S4) [21,[35][36][37]. In addition, the loading level of the electrode is one of the important parameters in the practical applications of LIBs, thus we also further investigated the electrochemical performance of the N-PGNS electrode with different loading masses (figure S5).…”

Section: Electrochemical Evaluationsupporting

confidence: 58%

Fabrication of nitrogen-doped porous graphene hybrid nanosheets from metal–organic frameworks for lithium-ion batteries

et al. 2020

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To achieve a good electrochemical performance of lithium-ion batteries (LIBs), the design and optimization of the anode is a key issue. Herein, the fabrication of nitrogen-doped porous graphene hybrid nanosheets (denoted as N-PGNS) is proposed via a simple functional group-induced growth of zeolitic imidazolate framework (ZIF-8) on graphene oxides (GO) followed by a one-step pyrolysis strategy. Detailed characterizations reveal that the N-doped porous carbon derived from ZIF-8 is homogeneously anchored on graphene, and can provide high electroactivity and numerous diffusion channels for fast Li+ transport. Meanwhile, the incorporation of graphene as a conductive framework and supporting substrate can accelerate the transfer of electrons. Taking advantage of the synergistic role between the graphene framework and N-doped porous carbon, the N-PGNS exhibits a stable reversible specific capacity of 741.8 mA h g–1 as the anode for LIBs, which is notably higher than that of the N-doped porous carbon obtained directly by pyrolysis of ZIF-8. Furthermore, the N-PGNS electrodes also show superior electrochemical stability with an initial capacity of 90.38% over 1000 cycles at 5 A g–1. The current strategy, which can control and adjust the growth of ZIF-8 via the inducing effect of GO, provides a promising solution to construct graphene hybrid nanosheets for high-performance LIBs.

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Section: Electrochemical Evaluationsupporting

confidence: 58%

Fabrication of nitrogen-doped porous graphene hybrid nanosheets from metal–organic frameworks for lithium-ion batteries

et al. 2020

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“…Three-dimensional (3D) carbon current collectors can form an interconnected electron conductive path to significantly improve the rate capability while maintaining excellent electrochemical stability [12][13][14][15]. Two-dimensional (2D) carbon films, such as graphite foil [16], carbon nanotube (CNT) film [17][18][19][20] and graphene film [21][22][23][24][25][26][27] have been reported to replace the metal current collectors in LIBs. These results indicate the great potential of carbon-based materials for current collectors in LIBs.…”

Section: Introductionmentioning

confidence: 99%

Graphene foil as a current collector for NCM material-based cathodes

Jin

et al. 2020

Nanotechnology

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When used as a current collector, aluminum foil (AF) is vulnerable to local anodic corrosion during the charge/discharge process, which can lead to the deterioration of lithium-ion batteries (LIBs). Herein, a graphene foil (GF) with high electrical conductivity (∼5800 S cm−1) and low mass density (1.80 g cm−3) was prepared by reduction of graphene oxide foil with ultra-high temperature (2800 °C) annealing, and it exhibited significantly anodic corrosion resistance when serving as a current collector. Moreover, a LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode using GF as a current collector (NCM523/GF) demonstrated a gravimetric capacity of 137.3 mAh g−1 at 0.5 C based on the mass of the whole electrode consisting of the active material, carbon black, binder, and the current collector, which is 44.5% higher than that of the NCM523/AF electrode. Furthermore, the NCM523/GF electrode retains higher capacity at relatively faster rates, from 0.1 C to 5.0 C. Therefore, GF, a lightweight corrosion-resistant current collector, is expected to replace the current commercial metal current collectors in LIBs and to achieve high energy-density 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

128

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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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Collector and binder-free high quality graphene film as a high performance anode for lithium-ion batteries

Abstract: Collector and binder-free high quality graphene film has been successfully synthesized by a simple filtration process.

Cited by 7 publications

References 34 publications

Fabrication of nitrogen-doped porous graphene hybrid nanosheets from metal–organic frameworks for lithium-ion batteries

Fabrication of nitrogen-doped porous graphene hybrid nanosheets from metal–organic frameworks for lithium-ion batteries

Graphene foil as a current collector for NCM material-based cathodes

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

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