Three-Layer Sulfur Cathode with a Conductive Material-Free Middle Layer

2020 ◽  
Vol 20 (8) ◽  
pp. 4943-4948
Author(s):  
Jukyoung Kang ◽  
Jong Won Park ◽  
Seok Kim ◽  
Yongju Jung
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Unique Feature ◽  
Specific Capacity ◽  
Middle Layer ◽  
Sulfur Cathode ◽  
Active Materials ◽  
Conductive Materials ◽  
Sulfur Layer ◽  
Sulfur Cathodes

An ingenious design for a three-layer sulfur cathode is demonstrated, in which the pure sulfur layer is sandwiched between carbon nanotube (CNT) films. The unique feature of this particular model is that the sulfur layer does not contain any conductive materials, and therefore, the top CNT film of the prepared three-layer CNT/S/CNT electrode is electrically isolated from the bottom CNT film. Scanning electron microscopy studies revealed that the three-layer cathode was transformed into a single CNT cathode, with proximate contact between the two CNT films in the upper plateau of the first discharge. The lithium–sulfur cells employing a CNT/S/CNT cathode exhibited remarkably enhanced performance in terms of the specific capacity, rate property, and cycling stability compared to the cells with a sulfur-coated CNT cathode. This can mainly be attributed to the top CNT film, which serves not only as an interlayer to trap the migrating polysulfides, but also as an electrode to facilitate the redox reaction of active materials. Such an innovative approach is promising as it may promote the rational design of high-performance sulfur cathodes.

scholarly journals Porous Carbon Architecture Assembled by Cross-Linked Carbon Leaves with Implanted Atomic Cobalt for High-Performance Li–S Batteries

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ruirui Wang ◽  
Renbing Wu ◽  
Chaofan Ding ◽  
Ziliang Chen ◽  
Hongbin Xu ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Specific Capacity ◽  
Three Dimension ◽  
Zeolitic Imidazolate Framework ◽  
Shuttle Effect ◽  
Promising Solution ◽  
Fading Rate ◽  
Kinetics Of ◽  
Sulfur Cathodes

AbstractThe practical application of lithium–sulfur batteries is severely hampered by the poor conductivity, polysulfide shuttle effect and sluggish reaction kinetics of sulfur cathodes. Herein, a hierarchically porous three-dimension (3D) carbon architecture assembled by cross-linked carbon leaves with implanted atomic Co–N4 has been delicately developed as an advanced sulfur host through a SiO2-mediated zeolitic imidazolate framework-L (ZIF-L) strategy. The unique 3D architectures not only provide a highly conductive network for fast electron transfer and buffer the volume change upon lithiation–delithiation process but also endow rich interface with full exposure of Co–N4 active sites to boost the lithium polysulfides adsorption and conversion. Owing to the accelerated kinetics and suppressed shuttle effect, the as-prepared sulfur cathode exhibits a superior electrochemical performance with a high reversible specific capacity of 695 mAh g−1 at 5 C and a low capacity fading rate of 0.053% per cycle over 500 cycles at 1 C. This work may provide a promising solution for the design of an advanced sulfur-based cathode toward high-performance Li–S batteries.

Novel melamine-based porous organic polymers: synthesis, characterizations, morphology modifications, and their applications in lithium-sulfur batteries

2021 ◽  
Author(s):  
Haiyang Liu ◽  
Jiaxing Wang ◽  
Miao SUN ◽  
Yu Wang ◽  
Runing Zhao ◽  
...  
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Organic Polymer ◽  
Energy Storage Devices ◽  
Shuttle Effect ◽  
Physical Constraints ◽  
Lithium Sulfur

Abstract Lithium-sulfur (Li-S) batteries have been considered to be one of the most promising energy storage devices in the next generation. However, the insulating properties of sulfur and the shuttle effect of soluble lithium polysulfides (LiPSs) seriously hinder the practical application of Li-S batteries. In this paper, a novel porous organic polymer (HUT3) was prepared based on the polycondensation between melamine and 1,4-phenylene diisocyanate. The micro morphology of HUT3 was improved by in-situ growth on different mass fractions of rGO (5%, 10%, 15%), and the obtained HUT3-rGO composites were employed as sulfur carriers in Li-S batteries with promoted the sulfur loading ratio and lithium ion mobility. Attributed to the synergistic effect of the chemisorption of polar groups and the physical constraints of HUT3 structure, HUT3-rGO/S electrodes exhibits excellent capacity and cyclability performance. For instance, HUT3-10rGO/S electrode exhibits a high initial specific capacity of 950 mAh g-1 at 0.2 C and retains a high capacity of 707 mAh g-1 after 500 cycles at 1 C. This work emphasizes the importance of the rational design of the chemical structure and opens up a simple way for the development of cathode materials suitable for high-performance Li-S batteries.

scholarly journals Hierarchical Carbon Microtube@Nanotube Core–Shell Structure for High-Performance Oxygen Electrocatalysis and Zn–Air Battery

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Wenfu Xie ◽  
Jianming Li ◽  
Yuke Song ◽  
Shijin Li ◽  
Jianbo Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Power ◽  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Mass ◽  
Core Shell ◽  
High Power Density ◽  
Mass Loading

AbstractZinc–air batteries (ZABs) hold tremendous promise for clean and efficient energy storage with the merits of high theoretical energy density and environmental friendliness. However, the performance of practical ZABs is still unsatisfactory because of the inevitably decreased activity of electrocatalysts when assembly into a thick electrode with high mass loading. Herein, we report a hierarchical electrocatalyst based on carbon microtube@nanotube core–shell nanostructure (CMT@CNT), which demonstrates superior electrocatalytic activity for oxygen reduction reaction and oxygen evolution reaction with a small potential gap of 0.678 V. Remarkably, when being employed as air–cathode in ZAB, the CMT@CNT presents an excellent performance with a high power density (160.6 mW cm−2), specific capacity (781.7 mAhg Zn −1 ) as well as long cycle stability (117 h, 351 cycles). Moreover, the ZAB performance of CMT@CNT is maintained well even under high mass loading (3 mg cm−2, three times as much as traditional usage), which could afford high power density and energy density for advanced electronic equipment. We believe that this work is promising for the rational design of hierarchical structured electrocatalysts for advanced metal-air batteries.

Gel based sulfur cathodes with a high sulfur content and large mass loading for high-performance lithium–sulfur batteries

2017 ◽  
Vol 5 (4) ◽  
pp. 1650-1657 ◽  
Author(s):  
Shiqi Li ◽  
Tong Mou ◽  
Guofeng Ren ◽  
Juliusz Warzywoda ◽  
Zidong Wei ◽  
...  
Keyword(s):  
Sulfur Content ◽  
High Performance ◽  
Large Mass ◽  
Mass Loading ◽  
Sulfur Cathode ◽  
High Sulfur Content ◽  
Lithium Sulfur Batteries ◽  
Sulfur Cathodes ◽  
Lithium Sulfur ◽  
High Sulfur Loading

A bacterial cellulose based carbon nanoribbon aerogel was employed for a gel-based sulfur cathode, simultaneously achieving both a high sulfur content (90%) and a high sulfur loading (6.4 mg cm−2) with a large capacity of 943 mA h g−1or 5.9 mA h cm−2.

scholarly journals Boosting High-Rate Zinc-Storage Performance by the Rational Design of Mn2O3 Nanoporous Architecture Cathode

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Danyang Feng ◽  
Tu-Nan Gao ◽  
Ling Zhang ◽  
Bingkun Guo ◽  
Shuyan Song ◽  
...  
Keyword(s):  
High Performance ◽  
Manganese Oxides ◽  
Rational Design ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Pore Sizes ◽  
Storage Performance ◽  
Zinc Storage

AbstractManganese oxides are regarded as one of the most promising cathode materials in rechargeable aqueous Zn-ion batteries (ZIBs) because of the low price and high security. However, the practical application of Mn2O3 in ZIBs is still plagued by the low specific capacity and poor rate capability. Herein, highly crystalline Mn2O3 materials with interconnected mesostructures and controllable pore sizes are obtained via a ligand-assisted self-assembly process and used as high-performance electrode materials for reversible aqueous ZIBs. The coordination degree between Mn2+ and citric acid ligand plays a crucial role in the formation of the mesostructure, and the pore sizes can be easily tuned from 3.2 to 7.3 nm. Ascribed to the unique feature of nanoporous architectures, excellent zinc-storage performance can be achieved in ZIBs during charge/discharge processes. The Mn2O3 electrode exhibits high reversible capacity (233 mAh g−1 at 0.3 A g−1), superior rate capability (162 mAh g−1 retains at 3.08 A g−1) and remarkable cycling durability over 3000 cycles at a high current rate of 3.08 A g−1. Moreover, the corresponding electrode reaction mechanism is studied in depth according to a series of analytical methods. These results suggest that rational design of the nanoporous architecture for electrode materials can effectively improve the battery performance. "Image missing"

Cubic MnSe2 microcube enabling high-performance sulfur cathode for lithium-sulfur batteries

2021 ◽  
Author(s):  
Jian Bao ◽  
Xin-Yang Yue ◽  
Rui-Jie Luo ◽  
Yong-Ning Zhou
Keyword(s):  
Strong Interaction ◽  
High Performance ◽  
Sulfur Cathode ◽  
Shuttle Effect ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

Cubic MnSe2 microcubes are introduced into sulfur cathodes to prevent the shuttle effect of lithium polysulfide through binding with polysulfide via the strong interaction between Se and S, thus alleviate...

Hierarchical NiCo-LDH/NiCoP@NiMn-LDH hybrid electrodes on carbon cloth for excellent supercapacitors

2018 ◽  
Vol 6 (31) ◽  
pp. 15040-15046 ◽  
Author(s):  
Haoyan Liang ◽  
Jinghuang Lin ◽  
Henan Jia ◽  
Shulin Chen ◽  
Junlei Qi ◽  
...  
Keyword(s):  
Life Span ◽  
High Performance ◽  
Rational Design ◽  
Carbon Cloth ◽  
Active Materials ◽  
Electrochemically Active ◽  
Long Life

To realize high-performance and long life span supercapacitors, highly electrochemically active materials and rational design of structure are highly desirable.

scholarly journals Properties of S-Functionalized Nitrogen-Based MXene (Ti2NS2) as a Hosting Material for Lithium-Sulfur Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2478
Author(s):  
Chenghao Yao ◽  
Wei Li ◽  
Kang Duan ◽  
Chen Zhu ◽  
Jinze Li ◽  
...  
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
Host Material ◽  
Sulfur Cathode ◽  
Shuttle Effect ◽  
Lithium Polysulfide ◽  
Lithium Sulfur Batteries ◽  
Calculation Results ◽  
Adsorption Energies ◽  
Lithium Sulfur

Lithium-sulfur (Li-S) batteries have received extensive attention due to their high theoretical specific capacity and theoretical energy density. However, their commercialization is hindered by the shuttle effect caused by the dissolution of lithium polysulfide. To solve this problem, a method is proposed to improve the performance of Li-S batteries using Ti2N(Ti2NS2) with S-functional groups as the sulfur cathode host material. The calculation results show that due to the mutual attraction between Li and S atoms, Ti2NS2 has the moderate adsorption energies for Li2Sx species, which is more advantageous than Ti2NO2 and can effectively inhibit the shuttle effect. Therefore, Ti2NS2 is a potential cathode host material, which is helpful to improve the performance of Li-S batteries. This work provides a reference for the design of high-performance sulfur cathode materials.

scholarly journals Carbon Anode Materials for Rechargeable Alkali Metal Ion Batteries and in-situ Characterization Techniques

2020 ◽  
Vol 8 ◽  
Author(s):  
Ruida Ding ◽  
Yalan Huang ◽  
Guangxing Li ◽  
Qin Liao ◽  
Tao Wei ◽  
...  
Keyword(s):  
Working Conditions ◽  
Carbon Material ◽  
High Performance ◽  
Carbon Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Ex Situ ◽  
Working Mechanism ◽  
Active Materials

Lithium-ion batteries (LIBs), used for energy supply and storage equipment, have been widely applied in consumer electronics, electric vehicles, and energy storage systems. However, the urgent demand for high energy density batteries and the shortage of lithium resources is driving scientists to develop high-performance materials and find alternatives. Low-volume expansion carbon material is the ideal choice of anode material. However, the low specific capacity has gradually become the shortcoming for the development of LIBs and thus developing new carbon material with high specific capacity is urgently needed. In addition, developing alternatives of LIBs, such as sodium ion batteries and potassium-ion batteries, also puts forward demands for new types of carbon materials. As is well-known, the design of high-performance electrodes requires a deep understanding on the working mechanism and the structural evolution of active materials. On this issue, ex-situ techniques have been widely applied to investigate the electrode materials under special working conditions, and provide a lot of information. Unfortunately, these observed phenomena are difficult to reflect the reaction under real working conditions and some important short-lived intermediate products cannot be captured, leading to an incomplete understanding of the working mechanism. In-situ techniques can observe the changes of active materials in operando during the charge/discharge processes, providing the concrete process of solid electrolyte formation, ions intercalation mechanism, structural evolutions, etc. Herein, this review aims to provide an overview on the characters of carbon materials in alkali ion batteries and the role of in-situ techniques in developing carbon materials.

Supercritical CO2 mediated incorporation of sulfur into carbon matrix as cathode materials towards high-performance lithium–sulfur batteries

2018 ◽  
Vol 6 (1) ◽  
pp. 212-222 ◽  
Author(s):  
Ruyi Fang ◽  
Chu Liang ◽  
Yang Xia ◽  
Zhen Xiao ◽  
Hui Huang ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
High Performance ◽  
Rational Design ◽  
Functional Materials ◽  
Carbon Matrix ◽  
Controllable Synthesis ◽  
Synthetic Strategy ◽  
Lithium Sulfur Batteries ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

A green and facile supercritical CO2 (SC-CO2) synthetic strategy is successfully developed to fabricate high-performance carbon–sulfur cathodes for advanced Li–S batteries, which also could open up a new avenue for the rational design and controllable synthesis of functional materials.

Sign in / Sign up

Export Citation Format

Share Document