Combined high catalytic activity and polysulfide confinement in hierarchical carbon-encapsulated CoSe hollow core-shell spheres for high-performance lithium–sulfur batteries

2021 ◽  
Vol 506 ◽  
pp. 230177
Author(s):  
Lun Li ◽  
Guobao Xu ◽  
Xiong Liu ◽  
Shouji Huang ◽  
Xiaolin Wei ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Performance ◽  
Core Shell ◽  
High Catalytic Activity ◽  
Hollow Core ◽  
Lithium Sulfur Batteries ◽  
Hierarchical Carbon ◽  
Lithium Sulfur

Towards rational design of core–shell catalytic nanoreactor with high performance catalytic hydrogenation of levulinic acid

2016 ◽  
Vol 6 (13) ◽  
pp. 5102-5115 ◽  
Author(s):  
Biplab Banerjee ◽  
Ramana Singuru ◽  
Sudipta K. Kundu ◽  
Karnekanti Dhanalaxmi ◽  
Linyi Bai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Hydrogenation ◽  
Levulinic Acid ◽  
High Performance ◽  
Rational Design ◽  
Core Shell ◽  
High Catalytic Activity

Core–shell catalytic nanoreactor was designed, exhibiting high catalytic activity for levulinic acid hydrogenation.

Synthesis and Electrochemical Properties of MoS2/rGO/S Composite as a Cathode Material for Lithium–Sulfur Batteries

2020 ◽  
Vol 20 (11) ◽  
pp. 7087-7091
Author(s):  
Bhumi Reddy Srinivasulu Reddy ◽  
Mookala Premasudha ◽  
Yeon-Ju Lee ◽  
Hyo-Jun Ahn ◽  
Nagireddy Gari Subba Reddy ◽  
...  
Keyword(s):  
Cathode Material ◽  
High Performance ◽  
Reversible Capacity ◽  
Diffusion Method ◽  
High Catalytic Activity ◽  
Potential Candidate ◽  
Lithium Sulfur Batteries ◽  
Attractive Option ◽  
Fading Rate ◽  
Lithium Sulfur

To develop the next-generation energy storage systems, lithium-sulfur batteries represent an attractive option due to its high theoretical capacity, and energy density. In this work, MoS2/rGO (reduced graphene oxide) was prepared by hydrothermal synthesis and sulfur added by the melt diffusion method. The as-prepared MoS2/rGO has strong polysulfides entrapping, high conductivity, large surface area, and high catalytic activity, consequently resulting in enhanced rate performance and cycling capability of Li-S batteries. The coin cells were constructed with the MoS2/rGO/S cathode material, exhibit a high reversible capacity of nearly 1380 mAh/g at 0.1 C, outstanding cycling stability with a low capacity fading rate. Present work reveals that the hierarchal MoS2/rGO/S cathodes are potential candidate materials for future high-performance lithium-sulfur batteries.

SiO2@MoS2 core–shell nanocomposite layers with high lithium ion diffusion as a triple polysulfide shield for high performance lithium–sulfur batteries

2019 ◽  
Vol 7 (13) ◽  
pp. 7644-7653 ◽  
Author(s):  
Jingyi Wu ◽  
Na You ◽  
Xiongwei Li ◽  
Hongxia Zeng ◽  
Shuai Li ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
High Performance ◽  
Lithium Ion ◽  
Core Shell ◽  
Ion Diffusion ◽  
Lithium Sulfur Batteries ◽  
Lithium Ion Diffusion ◽  
Lithium Sulfur

The synergistic effect of the SiO2@MoS2 core–shell nanocomposite simultaneously facilitates Li+ diffusion and provides triple confinement of polysulfides.

Tuning the Band Structure of MoS2 via Co9S8@MoS2 Core–Shell Structure to Boost Catalytic Activity for Lithium–Sulfur Batteries

ACS Nano ◽  
2020 ◽  
Vol 14 (12) ◽  
pp. 17285-17294
Author(s):  
Boyu Li ◽  
Qingmei Su ◽  
Lintao Yu ◽  
Jun Zhang ◽  
Gaohui Du ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Band Structure ◽  
Shell Structure ◽  
Core Shell ◽  
Lithium Sulfur Batteries ◽  
Core Shell Structure ◽  
Lithium Sulfur

scholarly journals A Novel Synthesizing Strategy of 3D Cose2 Porous Hollow Flowers for High Performance Lithium–Sulfur Batteries

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 273
Author(s):  
Wei Xu ◽  
Qikai Wu ◽  
Zhongmei Che ◽  
Bin Fan ◽  
Dengke Zhao ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Catalytic Activity ◽  
High Performance ◽  
Specific Capacity ◽  
High Rate ◽  
High Catalytic Activity ◽  
Discharge Process ◽  
Double Hydroxide ◽  
Lithium Sulfur ◽  
Charge Discharge

Redox kinetics of lithium polysulfides (LiPSs) conversion and poor electrical conductivity of sulfur during the charge-discharge process greatly inhibit the commercialization of high-performance lithium–sulfur (Li–S) batteries. Herein, we synthesized CoSe2 porous hollow flowers (CoSe2-PHF) by etching and further selenizing layered double hydroxide, which combined the high catalytic activity of transition metal compound and high electrical conductivity of selenium. The obtained CoSe2-PHF can efficiently accelerate the catalytic conversion of LiPSs, expedite the electron transport, and improve utilization of active sulfur during the charge-discharge process. As a result, with CoSe2-PHF/S-based cathodes, the Li–S batteries exhibited a reversible specific capacity of 955.8 mAh g−1 at 0.1 C and 766.0 mAh g−1 at 0.5 C, along with a relatively small capacity decay rate of 0.070% per cycle within 400 cycles at 1 C. Even at the high rate of 3 C, the specific capacity of 542.9 mAh g−1can be maintained. This work enriches the way to prepare porous composites with high catalytic activity and electrical conductivity as sulfur hosts for high-rate, long-cycle rechargeable Li–S batteries.

Controllable synthesis of highly uniform flower-like hierarchical carbon nanospheres and their application in high performance lithium–sulfur batteries

2017 ◽  
Vol 5 (13) ◽  
pp. 6245-6256 ◽  
Author(s):  
Daying Guo ◽  
Xi'an Chen ◽  
Huifang Wei ◽  
Menglan Liu ◽  
Feng Ding ◽  
...  
Keyword(s):  
High Performance ◽  
Sulfur Cathode ◽  
Controllable Synthesis ◽  
Carbon Nanospheres ◽  
Excellent Performance ◽  
Lithium Sulfur Batteries ◽  
Hierarchical Carbon ◽  
Highly Uniform ◽  
Lithium Sulfur

Highly uniform flower-like carbon nanospheres/sulfur cathode for Li–S battery delivers excellent performance.

scholarly journals MnO2-Coated Dual Core–Shell Spindle-Like Nanorods for Improved Capacity Retention of Lithium–Sulfur Batteries

2020 ◽  
Vol 4 (2) ◽  
pp. 42 ◽  
Author(s):  
Hamza Dunya ◽  
Maziar Ashuri ◽  
Dana Alramahi ◽  
Zheng Yue ◽  
Kamil Kucuk ◽  
...  
Keyword(s):  
High Performance ◽  
Synergistic Effects ◽  
Coulombic Efficiency ◽  
Rate Capability ◽  
Core Shell ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Dual Core ◽  
Lithium Sulfur

The emerging need for high-performance lithium–sulfur batteries has motivated many researchers to investigate different designs. However, the polysulfide shuttle effect, which is the result of dissolution of many intermediate polysulfides in electrolyte, has still remained unsolved. In this study, we have designed a sulfur-filled dual core–shell spindle-like nanorod structure coated with manganese oxide (S@HCNR@MnO2) to achieve a high-performance cathode for lithium–sulfur batteries. The cathode showed an initial discharge capacity of 1661 mA h g−1 with 80% retention of capacity over 70 cycles at a 0.2C rate. Furthermore, compared with the nanorods without any coating (S@HCNR), the MnO2-coated material displayed superior rate capability, cycling stability, and Coulombic efficiency. The synergistic effects of the nitrogen-doped hollow carbon host and the MnO2 second shell are responsible for the improved electrochemical performance of this nanostructure.

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