scholarly journals Design and facile synthesis of defect rich C-MoS2/rGO nanosheets for enhanced lithium-sulfur battery performance

2019 ◽  
Author(s):  
Chengxiang Tian ◽  
Juwei Wu ◽  
Zheng Ma ◽  
Bo Li ◽  
Pengcheng Li ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
High Porosity ◽  
Structural Stabilization ◽  
Lithium Sulfur Batteries ◽  
Different Temperatures ◽  
Reliable Design ◽  
Lithium Sulfur

Reliable design and fabrication of advanced electrode materials are vital for developing lithium sulfur batteries. In this contribution, we report a simple one-step hydrothermal strategy for fabrication of a C-MoS2/rGO composite with both large surface area and high porosity. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing graphene oxide (GO) and amorphous carbon. The conductibility and structural stabilization of the cathodes can be improved owing to combination between the amorphous carbon and rGO, which could also restrain the dissolution of polysulfides. After annealing at different temperatures, it is found that the C-MoS2/rGO-6-S composite annealed at 600 oC delivers noticeably enhanced the performance of lithium-sulfur batteries, with a high specific capacity of 572 mAh·g-1 at 0.2C after 550 cycles, and 551 mAh·g-1 even at 2C, much better than those of MoS2-S nanosheets (249 mAh·g-1 and 149 mAh·g-1) and C-MoS2/rGO-S composite (334 mAh·g-1 and 382 mAh·g-1). Our intended electrode design protocol and annealing process may pave the way for the construction of other high-performance metal disulphide electrode for electrochemical energy storage.

scholarly journals Design and facile synthesis of defect-rich C-MoS2/rGO nanosheets for enhanced lithium–sulfur battery performance

2019 ◽  
Vol 10 ◽  
pp. 2251-2260 ◽  
Author(s):  
Chengxiang Tian ◽  
Juwei Wu ◽  
Zheng Ma ◽  
Bo Li ◽  
Pengcheng Li ◽  
...  
Keyword(s):  
Amorphous Carbon ◽  
High Performance ◽  
Specific Capacity ◽  
High Porosity ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Different Temperatures ◽  
One Step ◽  
Design Protocol ◽  
Lithium Sulfur

We report a simple one-step hydrothermal strategy for the fabrication of a C-MoS2/rGO composite with both large surface area and high porosity for the use as advanced electrode material in lithium–sulfur batteries. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing reduced graphene oxide (rGO) and amorphous carbon. The conductibility of the cathodes can be improved through the combination of amorphous carbon and rGO, which could also limit the dissolution of polysulfides. After annealing at different temperatures, it is found that the C-MoS2/rGO-6-S composite annealed at 600 °C yields a noticeably enhanced performance of lithium–sulfur batteries, with a high specific capacity of 572 mAh·g−1 at 0.2C after 550 cycles, and 551 mAh·g−1 even at 2C, much better than that of MoS2-S nanosheets (249 mAh·g−1 and 149 mAh·g−1) and C-MoS2/rGO-S composites (334 mAh·g−1 and 382 mAh·g−1). Our intended electrode design protocol and annealing process may pave the way for the construction of other high-performance metal disulfide electrodes for electrochemical energy storage.

Sulfurized Polyacrylonitrile for High-Performance Lithium Sulfur Batteries: Advances and Prospects

2021 ◽  
Author(s):  
Xiaohui Zhao ◽  
Chonglong Wang ◽  
Ziwei Li ◽  
Xuechun Hu ◽  
Amir A. Razzaq ◽  
...  
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Specific Capacity ◽  
Rechargeable Batteries ◽  
Next Generation ◽  
Lithium Sulfur Batteries ◽  
Theoretical Specific Capacity ◽  
Lithium Sulfur

The lithium sulfur (Li-S) batteries have a high theoretical specific capacity (1675 mAh g-1) and energy density (2600 Wh kg-1), exerting a high perspective as the next-generation rechargeable batteries for...

scholarly journals MnO2/rGO/CNTs Framework as a Sulfur Host for High-Performance Li-S Batteries

Molecules ◽  
2020 ◽  
Vol 25 (8) ◽  
pp. 1989 ◽  
Author(s):  
Wei Dong ◽  
Lingqiang Meng ◽  
Xiaodong Hong ◽  
Sizhe Liu ◽  
Ding Shen ◽  
...  
Keyword(s):  
High Performance ◽  
Physical Adsorption ◽  
Rapid Development ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Framework Structure ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Initial Capacity

Lithium-sulfur batteries are very promising next-generation energy storage batteries due to their high theoretical specific capacity. However, the shuttle effect of lithium-sulfur batteries is one of the important bottlenecks that limits its rapid development. Herein, physical and chemical dual adsorption of lithium polysulfides are achieved by designing a novel framework structure consisting of MnO2, reduced graphene oxide (rGO), and carbon nanotubes (CNTs). The framework-structure composite of MnO2/rGO/CNTs is prepared by a simple hydrothermal method. The framework exhibits a uniform and abundant mesoporous structure (concentrating in ~12 nm). MnO2 is an α phase structure and the α-MnO2 also has a significant effect on the adsorption of lithium polysulfides. The rGO and CNTs provide a good physical adsorption interaction and good electronic conductivity for the dissolved polysulfides. As a result, the MnO2/rGO/CNTs/S cathode delivered a high initial capacity of 1201 mAh g−1 at 0.2 C. The average capacities were 916 mAh g−1, 736 mAh g−1, and 547 mAh g−1 at the current densities of 0.5 C, 1 C, and 2 C, respectively. In addition, when tested at 0.5 C, the MnO2/rGO/CNTs/S exhibited a high initial capacity of 1010 mAh g−1 and achieved 780 mAh g−1 after 200 cycles, with a low capacity decay rate of 0.11% per cycle. This framework-structure composite provides a simple way to improve the electrochemical performance of Li-S batteries.

Graphene oxide-polypyrrole composite as sulfur hosts for high-performance lithium-sulfur batteries

2018 ◽  
Vol 11 (06) ◽  
pp. 1840007 ◽  
Author(s):  
Qian Wang ◽  
Chengkai Yang ◽  
Hui Tang ◽  
Kai Wu ◽  
Henghui Zhou
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Density Functional ◽  
Specific Capacity ◽  
High Energy ◽  
High Energy Density ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Capacity Decay

Lithium-sulfur batteries are considered as a promising candidate for the next-generation high energy density storage devices. However, they are still hindered by serious capacity decay on cycling caused by the dissolution of redox intermediates. Here, we designed a unique structure with polypyrrole (ppy) inserting into the graphene oxide (GO) sheet for accommodating sulfur. Such a sulfur host not only exhibits a good electronic and ionic conductivity, but also can suppress polysulfide dissolution effectively. With this advanced design, the composite cathode showed a high specific capacity of 548.4[Formula: see text]mA[Formula: see text]h[Formula: see text]g[Formula: see text] at 5.0 C. A stable Coulombic efficiency of [Formula: see text]99.5% and a capacity decay rate as low as 0.089% per cycle along with 300 cycles at 1.0 C were achieved for composite cathodes with 78[Formula: see text]wt.% of S. Besides, the interaction mechanism between PPy and lithium polysulfides (LPS) was investigated by density-functional theory (DFT), suggesting that only the polymerization of N atoms can bind strongly to Li ions of LPS rather than single N atoms. The 3D structure GO-PPy host with high conductivity and excellent trapping ability to LPS offered a viable strategy to design high-performance cathodes for Li–S batteries.

Porous hybrid aerogels with ultrahigh sulfur loading for lithium–sulfur batteries

2018 ◽  
Vol 6 (19) ◽  
pp. 9032-9040 ◽  
Author(s):  
Yibo He ◽  
Songyan Bai ◽  
Zhi Chang ◽  
Qi Li ◽  
Yu Qiao ◽  
...  
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
Lithium Sulfur Batteries ◽  
Hybrid Aerogels ◽  
Lithium Sulfur ◽  
Hybrid Aerogel

Porous hybrid aerogel electrode materials with ultrahigh sulfur-loading were designed and fabricated for high performance Li–S batteries.

C–S@PANI composite with a polymer spherical network structure for high performance lithium–sulfur batteries

2016 ◽  
Vol 18 (1) ◽  
pp. 261-266 ◽  
Author(s):  
Junkai Wang ◽  
Kaiqiang Yue ◽  
Xiaodan Zhu ◽  
Kang L. Wang ◽  
Lianfeng Duan
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
3D Structure ◽  
Conductive Polymer ◽  
Cycling Performance ◽  
High Specific Capacity ◽  
Pani Composite ◽  
Lithium Sulfur Batteries ◽  
And Migration ◽  
Lithium Sulfur

C–S@PANI composite with conductive polymer spherical network was synthesized. Its 3D structure inhibits the dissolution and migration of polysulfides into electrolyte, delivering high specific capacity and a stable cycling performance.

Vanadium dioxide–reduced graphene oxide binary host as an efficient polysulfide plague for high-performance lithium–sulfur batteries

2019 ◽  
Vol 7 (4) ◽  
pp. 1658-1668 ◽  
Author(s):  
Sha Li ◽  
Yuan Cen ◽  
Qin Xiang ◽  
Muhammad Kashif Aslam ◽  
Bingbing Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vanadium Dioxide ◽  
High Performance ◽  
Specific Capacity ◽  
Storage Technology ◽  
Energy Storage Technology ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Theoretical Specific Capacity ◽  
Lithium Sulfur

Lithium–sulfur batteries are strongly expected to be the next-generation energy storage technology due to their superior theoretical specific capacity and energy density.

Cellulose-Derived Carbon Microfiber Mesh for Binder-Free Lithium—Sulfur Batteries

2020 ◽  
Vol 20 (9) ◽  
pp. 5629-5635
Author(s):  
Shiqi Li ◽  
Zhiqun Cheng ◽  
Tian Xie ◽  
Zhihua Dong ◽  
Guohua Liu
Keyword(s):  
High Performance ◽  
Carbon Materials ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Sulfide ◽  
Lithium Sulfur Batteries ◽  
Binder Free ◽  
Carbon Microfiber ◽  
Lithium Sulfur

The practical application of lithium–sulfur batteries (LSBs) has been impeded by several chronic problems related to the insulating nature of sulfur and lithium sulfide, in addition to the dissolution and diffusion of lithium polysulfides. In view of these problems, a large variety of carbonaceous materials have been employed to enhance the electronic conductivity of the cathode and/or sequester lithium polysulfides within conductive matrixes. Although they may exhibit impressive electrochemical performance, the fabrication of most carbon materials involves costly precursors and complicated procedures. Waste paper—the main constituent of municipal waste—is composed of carbohydrates, and can be an ideal precursor for carbon materials. Herein, carbon microfiber meshes (CMFMs) obtained by the pyrolysis of common filter paper in argon (A-CMFM) or ammonia (N-CMFM) were used to form sulfur cathodes. Compared with LSBs based on A-CMFM, those based on N-CMFM demonstrated higher specific capacity and better rate capability, with a capacity of 650 mA h g−1 at 0.2 C and 550 mA h g−1 at 0.5 C. This was owing to the strong immobilization of lithium polysulfides resulting from the heteroatom doping and hydrophilicity of N-CMFM. The results indicate that cellulose paper-derived carbon is a promising candidate for application in high-performance LSBs.

scholarly journals Three-dimensional ordered macroporous ZIF-8 nanoparticle-derived nitrogen-doped hierarchical porous carbons for high-performance lithium–sulfur batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (69) ◽  
pp. 41983-41992
Author(s):  
Xinxin Ji ◽  
Qian Li ◽  
Haoquan Yu ◽  
Xiaolin Hu ◽  
Yuanzheng Luo ◽  
...  
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
Three Dimensional ◽  
High Specific Capacity ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Lithium Sulfur Batteries ◽  
Ordered Macroporous ◽  
Lithium Sulfur

Lithium–sulfur (Li–S) batteries have attracted considerable attention due to their ultra-high specific capacity and energy density.

NiCo2S4/S Composites Used as Cathode Materials in Lithium-Sulfur Batteries with High Performance

NANO ◽  
2021 ◽  
pp. 2150029
Author(s):  
Qian Zhang ◽  
Renxia Zhu ◽  
Chenyu Zhao ◽  
Runze Fan ◽  
Yong Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
High Current Density ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Volumetric Strain ◽  
Electrochemical Performances ◽  
Discharge Process ◽  
Strong Adsorption ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Application of lithium-sulfur battery has been limited due to polysulfide dissolution, the insulating nature of sulfur and the volumetric strain produced during charge and discharge process. To improve the performance of Li-S batteries, two kinds of bimetallic sulfides of NiCo2S4 with flaky (F-NiCo2S4) and sea urchin-like (S-NiCo2S4) structures were synthesized by using simple hydrothermal method, which were used as sulfur carriers in lithium-sulfur batteries and showed excellent electrochemical properties. At 0.2[Formula: see text]C, both electrodes of F-NiCo2S4/S and S-NiCo2S4/S have high pristine discharge specific capacities of 986[Formula: see text]mAh[Formula: see text]g[Formula: see text] and 959[Formula: see text]mAh[Formula: see text]g[Formula: see text]. At high current density of 4[Formula: see text]C, the F-NiCo2S4/S electrode still has a high pristine discharge specific capacity of 673[Formula: see text]mAh[Formula: see text]g[Formula: see text] and a coulombic efficiency of 97.00%. The specific capacity can remain at 526[Formula: see text]mAh[Formula: see text]g[Formula: see text] with a low average attenuation of 0.17% even after 130 cycles. The excellent electrochemical performances of the cathode material can be ascribed to the synergistic effect of tubular morphology, good electrical conductivity and strong adsorption ability of NiCo2S4 matrix for polysulfide. The job provides a new scheme and material for application of lithium-sulfur batteries with high performance.

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