Microporous carbon nanosheets derived from corncobs for lithium–sulfur batteries

Guo, Jinxin; Zhang, Jun; Jiang, Fei; Zhao, Saihua; Su, Qingmei; Du, Gaohui

doi:10.1016/j.electacta.2015.07.077

Cited by 164 publications

(66 citation statements)

References 45 publications

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“…[5] Despite the remarkable potential, sulfur in lithium cell suffers from several drawbacks, such as low conductivity,w hichi sr eflected in a high polarization,a nd the formation of soluble species, that is, Li 2 S 8 and Li 2 S 6 polysulfides, [6] which react with conventional electrolytes and, at the same time, migrate to the lithium anode leadingtoa"shuttle reaction" strongly affecting cell efficiencya nd cycle life. [8] These issues may be mitigated by the preparation of composite sulfur materials including carbon nanospherules, [9] nanosheets, [10] nanotubes, [11] graphene, [12] ando ther nanostructured inactive supports. [8] These issues may be mitigated by the preparation of composite sulfur materials including carbon nanospherules, [9] nanosheets, [10] nanotubes, [11] graphene, [12] ando ther nanostructured inactive supports.…”

Section: Introductionmentioning

confidence: 99%

A Lithium‐Ion Battery using a 3 D‐Array Nanostructured Graphene–Sulfur Cathode and a Silicon Oxide‐Based Anode

et al. 2018

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An efficient lithium-ion battery was assembled by using an enhanced sulfur-based cathode and a silicon oxide-based anode and proposed as an innovative energy-storage system. The sulfur-carbon composite, which exploits graphene carbon with a 3 D array (3DG-S), was synthesized by a reduction step through a microwave-assisted solvothermal technique and was fully characterized in terms of structure and morphology, thereby revealing suitable features for lithium-cell application. Electrochemical tests of the 3DG-S electrode in a lithium half-cell indicated a capacity ranging from 1200 to 1000 mAh g at currents of C/10 and 1 C, respectively. Remarkably, the Li-alloyed anode, namely, Li SiO -C prepared by the sol-gel method and lithiated by surface treatment, showed suitable performance in a lithium half-cell by using an electrolyte designed for lithium-sulfur batteries. The Li SiO -C/3DG-S battery was found to exhibit very promising properties with a capacity of approximately 460 mAh g delivered at an average voltage of approximately 1.5 V over 200 cycles, suggesting that the characterized materials would be suitable candidates for low-cost and high-energy-storage applications.

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Section: Introductionmentioning

confidence: 99%

A Lithium‐Ion Battery using a 3 D‐Array Nanostructured Graphene–Sulfur Cathode and a Silicon Oxide‐Based Anode

et al. 2018

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“…Activated carbon is the most widely used active material for the EDLC electrodes due to its high surface area and relatively low cost [15]. Carbon materials for electrochemical energy storage devices are mainly derived from biomass [16][17][18][19]. At the same time, new types of electrolytes were studied, with the aim to increase the operative voltage of EDLC devices as a consequence of high conductivity and excellent electrochemical stability of these electrolytes [20,21].…”

Section: Introductionmentioning

confidence: 99%

Electrodes and hydrogel electrolytes based on cellulose: fabrication and characterization as EDLC components

Kasprzak

Stępniak

Galiński

2018

J Solid State Electrochem

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In the present work, the cellulose-based materials were manufactured and used as components of electrochemical double layer capacitors (EDLCs). The preparation method of cellulose membranes as well as composite electrodes containing cellulose as a binder was presented. These materials were prepared using for the first time ionic liquid/dimethyl sulfoxide (IL/DMSO) mixture solvent. Obtained components displayed a uniform structure, thermal stability, and good electrochemical properties. The electrochemical performances of these materials were studied in 2-electrode EDLC cells by common electrochemical techniques as cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). The composite electrodes were investigated in three types of electrolytes: aqueous, organic, and ionic liquids. The cellulose membranes were, however, soaked in an aqueous electrolyte and tested as hydrogel polymer electrolytes. All investigated materials show high efficiency in terms of specific capacity. The studied cellulose-based capacitors exhibited specific capacitance values in the range of 20-22 F g −1 , depending on the type of applied electrolyte.

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“…For example, the impact on the shuttle process is high for a Li–S cell at low rates. On the other hand, at high rates of charge and discharge, a high value of Coulombic efficiency is observed and thus comparison between the high and low rates becomes highly complicated . It is also noteworthy to mention that most of the Li–S cells cycled at lower C‐rate (0.1 C) undergo for a capacity fading rapidly .…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, at high rates of charge and discharge, a high value of Coulombic efficiency is observed and thus comparison between the high and low rates becomes highly complicated. [58][59][60][61] It is also noteworthy to mention that most of the Li-S cells cycled at lower C-rate (0.1 C) undergo for a capacity fading rapidly. 25,[62][63][64] The Li-S cell is able to deliver a discharge capacity of 475 mA h/g with a stable cycling.…”

Section: Charge-discharge Studies On S-c/cgpe/li Cellmentioning

confidence: 99%

Electrochemical studies on composite gel polymer electrolytes for lithium sulfur‐batteries

Angulakshmi

Stephan

Chan

et al. 2016

J of Applied Polymer Sci

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Poly(ethylene oxide)‐based composite gel polymer electrolytes (CGPE's) were prepared for various concentrations of magnesium aluminate (MgAl2O4) and LiTFSI as salt with a combination of 1,3‐dioxolane (DOL) and tetraethylene glycol dimethyl ether (TEGDME) as plasticizer by a simple solution casting technique. The addition of plasticizers has significantly improved the ionic conductivity of the gel electrolytes. The prepared CGPEs were subjected to scanning electron microscopy, thermal, and FT‐IR analysis. The electrochemical properties such as ionic conductivity, compatibility, and charge–discharge behavior have also been studied. Preliminary studies revealed that the prepared CGPE can be employed as a potential electrolyte for lithium–sulfur (Li–S) batteries. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44594.

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Microporous carbon nanosheets derived from corncobs for lithium–sulfur batteries

Cited by 164 publications

References 45 publications

A Lithium‐Ion Battery using a 3 D‐Array Nanostructured Graphene–Sulfur Cathode and a Silicon Oxide‐Based Anode

A Lithium‐Ion Battery using a 3 D‐Array Nanostructured Graphene–Sulfur Cathode and a Silicon Oxide‐Based Anode

Electrodes and hydrogel electrolytes based on cellulose: fabrication and characterization as EDLC components

Electrochemical studies on composite gel polymer electrolytes for lithium sulfur‐batteries

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