The rapid development of electric vehicles and smart grids proposes new challenges for next generation secondary batteries with higher energy density and power density. 1–9 Rechargeable lithium-iodine (Li-I2) batteries comprised of an iodine-based cathode and a lithium metal anode are promising candidates to meet these demands. 10–14 Firstly, Li-I 2 …
Glass nanoparticles embedded in graphene give lithium-ion batteries better capacity. Dexter Johnson. 31 Mar 2016. 2 min read. Illustration: Kansas State University/Nature Communications
Abstract A polypyrrole/reduced graphene oxide (PPy/r-GO) composite film is prepared by inducing electrochemical reduction of graphene oxide incorporated into PPy as the dopant. ... i.e., a high rate capability and excellent cycling stability when used as a cathode material in a lithium ion battery. It also delivers a large reversible capacity ...
Vanadium oxides and their derivatives are known for their performance in lithium-ion batteries (LIBs). However, the practical application of these materials in commercial LIBs is still hindered by their intrinsic low ionic diffusion coefficient and moderate electrical conductivity. To improve their conductivity and their structural stability, a robust scenario is …
The graphene/mesocarbon microbead (MCMB) composite is assessed as an anode material with a high capacity for lithium-ion batteries. The composite electrode exhibits improved cycling stability and rate capability, delivering a high initial charge/discharge capacity of 421.4 mA·h/g/494.8 mA·h/g as well as an excellent capacity retention over 500 cycles at a …
The graphene oxide is successfully synthesized via modified hummers method, and the graphene oxide/sulfur composites are synthesized via melt diffusion method. The GO/S composites are used in lithium-sulfur battery to enhance its electrochemical performance. Higher initial capacity and better rate performance can be achieved, which can be attributed to the …
Zhang, Y.-j et al. Integrated reduced graphene oxide multilayer/Li composite anode for rechargeable lithium metal batteries. RSC Adv. 6, 11657–11664 (2016). Article Google Scholar
Reasonable design and applications of graphene-based materials are supposed to be promising ways to tackle many fundamental problems emerging in lithium batteries, …
The performance of the composite in lithium-ion batteries was evaluated. ... Abu-Lebdeh Y, Davidson IJ (2012) High gravimetric capacity and long cycle life in Mn 3 O 4 /graphene platelet/LiCMC composite lithium ion batteries anodes. J Power Sources 213:249–254. Google Scholar Xing L, Cui C, Ma C, Xue X (2011) Facile ...
Recently, the application of LiFePO4 (LFP) batteries in electric vehicles has attracted extensive attention from researchers. This work presents a composite of LFP particles trapped in reduced graphene oxide (rGO) …
The experimental data also demonstrated that such a precisely designed LFP/graphene composite shows a strikingly high electrical conductivity of 18.9 S cm −1 (in …
A significant driving force behind the brisk research on rechargeable batteries, particularly lithium-ion batteries (LiBs) in high-performance applications, is the development of portable devices and electric vehicles. Carbon-based materials, which have finite specific capacity, make up the anodes of LiBs.
Therefore, constructing high-efficiency and stable anodes is of great significance for the practical application of lithium-ion batteries. In response, graphene-based composite anodes have recently achieved much-enhanced electrochemical performance due to their unique two-dimensional cellular lattice structure, excellent electrical conductivity ...
Schematic diagram of the properties and applications of lithium-ion batteries using graphene oxide
When utilized directly as anode materials for lithium-ion batteries, graphene materials are prone to aggregating and lack the benefit of lithium storage. As a result, …
Stepping into the 21st century, "graphene fever" swept the world due to the discovery of graphene, made of single-layer carbon atoms with a hexagonal lattice. This wonder material displays impressive material properties, such as its electrical conductivity, thermal conductivity, and mechanical strength, and it also possesses unique optical and magnetic …
In recent years, graphene has been considered as a potential "miracle material" that will revolutionize the Li-ion battery (LIB) field and bring …
For now, graphene-composite (using graphene to enhance the chemical properties of standard Li-ion batteries) seems like the way to go. Graphene vs. lithium-ion batteries
In this work, the authors report a facile method for the preparation of brush-structured nanocomposites of sulfur–polyaniline–graphene oxide (S–PANI–G) that were used for cathode materials of lithium–sulfur batteries (LSBs). The morphology and structure of composite were studied by x-ray photoelectron microscopy, transmission electron microscopy, …
Interestingly, the integration of TiO 2 with graphene introduces very few defects on the graphene surface, e.g., as revealed by the slight increase in I D /I G ratios from 0.96 for pristine graphene to 0.99 for the TiO 2 /graphene composite (Fig. 6), where the D- and G-bands are associated with the presence of defects and ordered graphitic sp 2 ...
Graphene batteries are said to be the absolute alternative to our current-gen lithium-ion batteries. Graphene batteries are itself quite lightweight, advanced and powerful. ... One of the electrodes in graphene-based batteries, mostly the cathode, is replaced with a hybrid composite material (solid-state metal + graphene) used in place of a ...
A novel nano-WS2/graphene nanosheets (GNSs) composite is obtained by ball milling with xylitol as auxiliary agent and high-temperature sintering. Xylitol improves the shear force during ball milling and well overcomes the van der Waals interactions between the interlayer of graphite and WS2. Through high-temperature calcination, GNSs and WS2 …
Exceptionally low decrease in the specific capacity upon the increase of the power load, perfect cycling stability and high Coulombic efficiency supported by …
In addition to sulfur, lithium sulfide (Li 2 S) was also used to composite with graphene for Li–S batteries ... Multiple methods have been jointly used to enhance the physical and chemical interactions between graphene and lithium polysulfides. The first approach is to construct porous structures. Unlike GO, defect-free graphene sheets are ...
A novel sulfur/graphene nanosheet (S/GNS) composite was prepared via a simple ball milling of sulfur with commercial multi-layer graphene nanosheet, followed by a heat treatment. High-resolution transmission and scanning electronic microscopy observations showed the formation of irregularly interlaced nanosheet-like structure consisting of graphene with …
Since graphene in the composite is electrochemically inert in the potential region used, the (CV) redox peaks are only attributable to the oxidation and reduction of elemental sulfur, so therefore, no additional peaks were found for the S-GSN composite in comparison with pure S electrode [4].. According to the CV performance, it appears that all the redox processes …
Due to the advantages of good safety, long cycle life, and large specific capacity, LiFePO4 is considered to be one of the most competitive materials in lithium-ion batteries. But its development is limited by the shortcomings of low electronic conductivity and low ion diffusion efficiency. As an additive that can effectively improve battery performance, …
This study aimed to enhance lithium battery performance through the utilization of porous conductive polyaniline-modified graphene composites (PMGCs). Given the growing importance of green energy, coupled with the development of lithium-ion battery systems and electric vehicles, achieving high-speed charge and discharge performance is imperative. …
Unfortunately, in currently available graphene composite lithium ion battery cathode material characterizations little attention has been devoted to the characterization of graphene itself. Raman spectra of graphene composite cathode materials usually have distinct carbon D and G bands located at 1350 and 1595 cm −1 respectively.
Recently, the application of LiFePO4 (LFP) batteries in electric vehicles has attracted extensive attention from researchers. This work presents a composite of LFP particles trapped in reduced graphene oxide (rGO) nanosheets obtained through the high-temperature reduction strategy. The obtained LiFePO4/rGO composites indicate spherical morphology and …
Layered LiMO2 (M = Ni, Co, and Mn) is a type of promising cathode materials for high energy density and high work voltage lithium-ion batteries. However, the poor rate performance and low power density hinder its further applications. The capacity fade is related to the structural transformation in the layered LiMO2. In this work, the structural changes of bi …
Herein, we facilely fabricate a core-shell Si/C/graphene 3D composite for lithium-ion battery anode using the melamine formaldehyde resin as 3D porous skelecton and the polypyrrole as carbon shell precursor. The 3D porous melamine formaldehyde resin can prevent the agglomeration of silicon nanoparticles, buffer the volume change during charging ...
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