The facile synthesis and enhanced lithium–sulfur battery performance of an amorphous cobalt boride (Co2B)@graphene composite cathode

2018 ◽  
Vol 6 (47) ◽  
pp. 24045-24049 ◽  
Author(s):  
Bin Guan ◽  
LiShuang Fan ◽  
Xian Wu ◽  
Pengxiang Wang ◽  
Yue Qiu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Specific Capacity ◽  
Composite Cathode ◽  
Cycling Performance ◽  
Facile Synthesis ◽  
Graphene Composite ◽  
Cobalt Boride ◽  
Sulfur Host ◽  
Sulfur Battery ◽  
Lithium Sulfur

The facile synthesis of (Co2B)@graphene as a novel sulfur host, which provides good specific capacity and cycling performance, endowed by the unique “synergistic effect” of Co and B.

Sulfur impregnation in polypyrrole-modified MnO2 nanotubes: efficient polysulfide adsorption for improved lithium–sulfur battery performance

Nanoscale ◽  
2019 ◽  
Vol 11 (20) ◽  
pp. 10097-10105 ◽  
Author(s):  
Pengcheng Du ◽  
Wenli Wei ◽  
Yuman Dong ◽  
Dong Liu ◽  
Qi Wang ◽  
...  
Keyword(s):  
Outer Layer ◽  
Specific Capacity ◽  
Cycling Performance ◽  
Lithium Sulfur Battery ◽  
Highly Efficient ◽  
Hollow Interior ◽  
Sulfur Host ◽  
Sulfur Battery ◽  
Lithium Sulfur

PPy-coated MnO2 nanotubes were fabricated as a highly efficient sulfur host. Hollow interior of the MnO2 nanotubes and the polypyrrole outer layer can effectively improve the specific capacity and maintain an extremely stable cycling performance.

Different Dimensions of g-C3N4 Nanomaterials on Sulphur Cathode for Lithium Sulfur Batteries

2020 ◽  
Vol 20 (3) ◽  
pp. 1643-1650 ◽  
Author(s):  
Juan Yu ◽  
Nani Ma ◽  
Jiaxin Peng ◽  
Yangyang Dang ◽  
Dongdong Zheng ◽  
...  
Keyword(s):  
Specific Capacity ◽  
Cycling Performance ◽  
Electrochemical Kinetics ◽  
Chemical Adsorption ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Different Dimensions ◽  
Sulfur Battery ◽  
Kinetics Of ◽  
Lithium Sulfur

Lithium sulfur batteries (Li–S) have been deemed to be the promising energy-storage systems. Nevertheless, the shuttle effect caused by diffusion of polysulfides limit their application. In this work, the different dimensions of g-C3N4 nanomaterials (2D g-C3N4 nanosheets and 3D g-C3N4 nanomesh) were doped in S electrode. Because of the large specific surface area of 3D g-C3N4 nanomesh and strong chemical adsorption of polysulfides can provide better effect for inhibition of shuttling effect and its proper electron passage make electrochemical kinetics of lithium–sulfur battery enhanced. The discharge specific capacity of the 3D g-C3N4 battery is up to 731 mAh/g and longer cycling performance with 540 mAh/g after 180 cycles. This experiment paves the way forward for the application of g-C3N4 on Li–S batteries.

scholarly journals Graphene/Sulfur@Graphene Composite Structure Material for a Lithium-Sulfur Battery Cathode

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Zengren Tao ◽  
Jianrong Xiao ◽  
Zhiyun Yang ◽  
Heng Wang
Keyword(s):  
Discharge Capacity ◽  
Composite Structure ◽  
Coulombic Efficiency ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
Graphene Composite ◽  
Initial Discharge ◽  
Fading Rate ◽  
Sulfur Battery ◽  
Lithium Sulfur

Graphene/sulfur@graphene composite structure as a cathode material is synthesized with a facile method. Graphene can provide a more efficient conductive network for sulfur and improve the coulombic efficiency of the battery. On the other hand, it may also show the anchoring effect on sulfur, which reduces the loss of sulfur and improves the cycling performance of the battery. Due to the unique structure, the initial discharge capacity of a battery assembled with this structure could reach 1036 mAh g−1 at 0.1 C, and its reversible capacity of 619 mAh g−1 was retained after 200 cycles with a low fading rate of 0.2% per cycle. The battery could hold a discharge capacity of 501 mAh g−1 after 200 cycles at 0.5 C. Thus, the electrochemical performance improved because of the reduction of sulfur loss through polysulfide accumulation at the cathode.

Kinetics enhancement of lithium–sulfur batteries by interlinked hollow MoO2 sphere/nitrogen-doped graphene composite

2017 ◽  
Vol 5 (48) ◽  
pp. 25187-25192 ◽  
Author(s):  
Xian Wu ◽  
Ying Du ◽  
Pengxiang Wang ◽  
Lishuang Fan ◽  
Junhan Cheng ◽  
...  
Keyword(s):  
High Performance ◽  
Lithium Sulfur Battery ◽  
Nitrogen Doped ◽  
Graphene Composite ◽  
Lithium Sulfur Batteries ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Sulfur Host ◽  
Sulfur Battery ◽  
Lithium Sulfur

This communication reports an interlinked MoO2 and N-rGO composite as sulfur host for high-performance lithium sulfur battery.

The TiO2-Modified Separator Improving the Electrochemical Performance of Lithium-Sulfur Battery

2021 ◽  
Vol 105 (1) ◽  
pp. 183-189
Author(s):  
Marketa Zukalova ◽  
Monika Vinarcikova ◽  
Barbora Pitna Laskova ◽  
Ladislav Kavan
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Electrochemical Performance ◽  
Specific Capacity ◽  
Composite Cathode ◽  
Sulfur Cathode ◽  
Charge Capacity ◽  
Sulfur Battery ◽  
Lithium Sulfur ◽  
Modified Separator

Electrochemical performance of activated carbon/sulfur composite cathode in the Li-S cell with standard and TiO2-modified separator is evaluated by cyclic voltammetry and galvanostatic chronopotentiometry. The modification of the separator by TiO2 impregnation has beneficial effect on the charge capacity of the activated carbon/sulfur cathode in the Li-S cell. The specific capacity of the cathode in the cell with TiO2-modified separator is 632 mAh g-1 (calculated from cyclic voltammetry) and 673 mAh g-1 (determined from galvanostatic chronopotentiometry). Facile impregnation of the separator with nanocrystalline TiO2 results in the 10-20 % stable increase of the charge capacity of corresponding activated carbon/sulfur cathode as compared to its electrochemical performance in the system with non-modified separator.

scholarly journals Lamellar Polypyrene Based on Attapulgite–Sulfur Composite for Lithium–Sulfur Battery

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 483
Author(s):  
Jing Wang ◽  
Riwei Xu ◽  
Chengzhong Wang ◽  
Jinping Xiong
Keyword(s):  
Cathode Material ◽  
Current Density ◽  
High Current Density ◽  
Specific Capacity ◽  
Lithium Sulfur Batteries ◽  
Rate Test ◽  
Sulfur Battery ◽  
Lower Capacity ◽  
Lithium Sulfur

We report on the preparation and characterization of a novel lamellar polypyrrole using an attapulgite–sulfur composite as a hard template. Pretreated attapulgite was utilized as the carrier of elemental sulfur and the attapulgite–sulfur–polypyrrole (AT @400 °C–S–PPy) composite with 50 wt.% sulfur was obtained. The structure and morphology of the composite were characterized with infrared spectroscopy (IR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). An AT @400 °C–S–PPy composite was further utilized as the cathode material for lithium–sulfur batteries. The first discharge specific capacity of this kind of battery reached 1175 mAh/g at a 0.1 C current rate and remained at 518 mAh/g after 100 cycles with capacity retention close to 44%. In the rate test, compared with the polypyrrole–sulfur (PPy–S) cathode material, the AT @400 °C–S–PPy cathode material showed lower capacity at a high current density, but it showed higher capacity when the current came back to a low current density, which was attributed to the “recycling” of pores and channels of attapulgite. Therefore, the lamellar composite with special pore structure has great value in improving the performance of lithium–sulfur batteries.

Potato Peel Based Carbon–Sulfur Composite as Cathode Materials for Lithium Sulfur Battery

2021 ◽  
Vol 21 (12) ◽  
pp. 6243-6247
Author(s):  
Arenst Andreas Arie ◽  
Shealyn Lenora ◽  
Hans Kristianto ◽  
Ratna Frida Susanti ◽  
Joong Kee Lee
Keyword(s):  
Cathode Materials ◽  
Porous Carbon ◽  
Chemical Activation ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Electrochemical Characteristics ◽  
Potato Peel ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur

Lithium sulfur battery has become one of the promising rechargeable battery systems to replace the conventional lithium ion battery. Commonly, it uses carbon–sulfur composites as cathode materials. Biomass based carbons has an important role in enhancing its electrochemical characteristics due to the high conductivity and porous structures. Here, potato peel wastes have been utilized to prepare porous carbon lithium sulfur battery through hydrothermal carbonization followed by the chemical activation method using KOH. After sulfur loading, as prepared carbon–sulfur composite shows stable coulombic efficiencies of above 98% and a reversible specific capacity of 804 mAh g−1 after 100 cycles at current density of 100 mA g−1. These excellent electrochemical properties can be attributed to the unique structure of PPWC showing mesoporous structure with large specific surface areas. These results show the potential application of potato peel waste based porous carbon as electrode’s materials for lithium sulfur battery.

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