Graphene sheet-encased silica/sulfur composite cathode for improved cyclability of lithium-sulfur batteries

Rajkumar, P.; Diwakar, K.; Subadevi, R.; Gnanamuthu, R. M.; Wang, Fuming; Liu, Wei‐Ren

doi:10.1007/s10008-020-04747-3

Cited by 8 publications

(2 citation statements)

References 54 publications

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“…Apparent from the data, the battery presented an initial specific capacity of 1078 mA h g –1 and maintained 823 mA h g –1 even after 200 cycles at 0.5 C. However, a low discharge capacity (429 mA h g –1 ) was observed for the battery with Ti 3 C 2 T x @S cathode. In addition, MSHA@S cathode was superior to many other SiO 2 -based cathodes, such as SiO 2 -coated sulfur particles (763.2 mA h g –1 at 0.1 C after 50 cycles) and sulfur/SiO 2 /partially reduced graphene oxide (491 mA h g –1 at 0.2 C after 300 cycles) [ 47 , 48 ]. The improved electrochemical properties might be attributed to hierarchically porous network structure and strong interaction between SiO 2 components and polysulfide species.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Porous and Three-Dimensional MXene/SiO2 Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries

et al. 2022

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A unique porous material, namely, MXene/SiO2 hybrid aerogel, with a high surface area, was prepared via sol-gel and freeze-drying methods. The hierarchical porous hybrid aerogel possesses a three-dimensional integrated network structure of SiO2 cross-link with two-dimensional MXene; it is used not only as a scaffold to prepare sulfur-based cathode material, but also as an efficient functional separator to block the polysulfides shuttle. MXene/SiO2 hybrid aerogel as sulfur carrier exhibits good electrochemical performance, such as high discharge capacities (1007 mAh g–1 at 0.1 C) and stable cycling performance (823 mA h g–1 over 200 cycles at 0.5 C). Furthermore, the battery assembled with hybrid aerogel-modified separator remains at 623 mA h g–1 over 200 cycles at 0.5 C based on the conductive porous framework and abundant functional groups in hybrid aerogel. This work might provide further impetus to explore other applications of MXene-based composite aerogel.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Porous and Three-Dimensional MXene/SiO2 Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries

et al. 2022

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“…Over the past few years, research efforts focus on improving the conductivity and preventing polysulfide shuttling using graphene oxide (GO) [13]. GO with suitable polarity can interact with polar polysulfides and cause strong chemical adsorption with them [14,15]. The S-O and S-C interactions can occur between sulfur and oxygen functional groups of GO.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide interlayered in binder-free sulfur vapor deposited cathode for lithium–sulfur battery

Hakimi¹,

Sanaee²,

Ghasemi³

et al. 2022

J. Phys. D: Appl. Phys.

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The main drawback of Lithium-Sulfur (Li-S) batteries which leads to a short lifetime, is the shuttle effect during the battery operation. One of the solutions to mitigate the shuttle effect is the utilization of interlayers. Herein, graphene oxide (GO) paper as an interlayer has been implemented between the sulfur cathode fabricated by the vapor deposition process as a binder-free electrode and a separator in a Li-S battery in order to gain a sufficient capacity. The morphological characteristics and electrochemical performance of the fabricated electrode have been investigated. The fabricated battery demonstrates an initial discharge capacity of 1265.46 mAh g-1 at the current density of 100 mA g-1. The coulombic efficiency is obtained to be 88.49% after 40 cycles. The remained capacity for the battery is 44.70% after several cycles at different current densities. The existence of the GO interlayer improves the electrochemical properties of the battery compared to the one with a pure sulfur cathode. The obtained results indicate that after 40 cycles, the capacity retention is 2.1 times more than that of the battery without the GO implementation.

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Pomelo peel-derived porous carbon as excellent LiPS anchor in lithium-sulfur batteries

Sui

Liu

et al. 2022

J Solid State Electrochem

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Graphene sheet-encased silica/sulfur composite cathode for improved cyclability of lithium-sulfur batteries

Cited by 8 publications

References 54 publications

Hierarchical Porous and Three-Dimensional MXene/SiO2 Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries

Hierarchical Porous and Three-Dimensional MXene/SiO2 Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries

Graphene oxide interlayered in binder-free sulfur vapor deposited cathode for lithium–sulfur battery

Pomelo peel-derived porous carbon as excellent LiPS anchor in lithium-sulfur batteries

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