A novel separator modified by titanium dioxide nanotubes/carbon nanotubes composite for high performance lithium-sulfur batteries

The rechargeable lithium-sulfur batteries were investigated as the most promising energy storage system. Although the composites of carbonaceous materials and metal oxides as the hosts of sulfur have been applied to improve the performance, their structures usually collapsed due to huge volumetric expansion of sulfur. Therefore, interlayer reported as a novel cell configuration could efficiently restrict the shuttle effect of polysulfide. Here, we design a unique separator modified by a functional “polysulfide trapping net” which consists of intertwined TiO2 nanotubes and carbon nanotubes to improve the electrochemical performance of lithium sulfur batteries. Benefiting from the network structure, there are abundant ion pathways, meanwhile, TiO2 nanotubes provide strong chemical and physical adsorption, carbon nanotubes serve as a conductive network which accelerates the transport of electrons. With the modified separator, the electrode exhibits an initial capacity of 936[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1[Formula: see text]C rate and maintains a stable cycling performance over 200 cycles.

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

Molecules ◽

10.3390/molecules25081989 ◽

2020 ◽

Vol 25 (8) ◽

pp. 1989 ◽

Cited By ~ 1

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.

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Three-in-one cathode host based on Nb3O8/graphene superlattice heterostructures for high-performance Li–S batteries

Journal of Materials Chemistry A ◽

10.1039/d1ta01913a ◽

2021 ◽

Author(s):

Chenhui WANG ◽

Nobuyuki Sakai ◽

Yasuo Ebina ◽

Takayuki KIKUCHI ◽

Monika Snowdon ◽

...

Keyword(s):

Energy Storage ◽

High Performance ◽

Next Generation ◽

Shuttle Effect ◽

Lithium Sulfur Batteries ◽

Graphene Superlattice ◽

Lithium Sulfur

Lithium-sulfur batteries have high promise for application in next-generation energy storage. However, further advances have been hindered by various intractable challenges, particularly three notorious problems: the “shuttle effect”, sluggish kinetics...

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Co-W Bimetallic Carbides as Sulfur Host for High-Performance Lithium–Sulfur Batteries

10.21203/rs.3.rs-308410/v1 ◽

2021 ◽

Author(s):

Dongke Zhang ◽

Ting Huang ◽

Pengfei Zhao ◽

Ze Zhang ◽

Xingtao Qi ◽

...

Keyword(s):

High Performance ◽

Conductive Network ◽

Rate Performance ◽

Cycle Stability ◽

Sulfur Cathode ◽

Shuttle Effect ◽

Lithium Sulfur Batteries ◽

Sulfur Host ◽

Lithium Sulfur ◽

Excellent Stability

Abstract Due to the low conductivity of sulfur and the dissolution of polysulfides, the research and application of lithium-sulfur (Li-S) batteries have encountered certain resistance. Increasing conductivity and introducing polarity into the sulfur host can effectively overcome these long-standing problems. Herein, We first prepared Co3W3C@ C@ CNTs / S material and used it in the cathode of lithium-sulfur batteries, The existence of carboxylated CNTs can form a conductive network, accelerate the transmission of electrons and improve the rate performance, and polar Co3W3C can form a strong interaction with polysulfide intermediates, effectively inhibiting its shuttle effect, improving the utilization of sulfur cathode electrodes, and improving the capacity and cycle stability. The Co3W3C@C@CNTs / S electrode material has a capacity of 1,093 mA h g-1 at a 0.1 A g− 1 and 482 mA h g-1 at 5 A g− 1. Even after 500 cycles of 2 A g− 1, the capacity of each cycle is only reduced by 0.08%. The excellent stability of this material can provide a new idea for the future development of lithium-sulfur batteries.

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Facile Synthesis of Uniform Carbon Coated Li2S/rGO cathode for High-Performance Lithium-Sulfur Batteries

MRS Advances ◽

10.1557/adv.2018.428 ◽

2018 ◽

Vol 3 (60) ◽

pp. 3501-3506 ◽

Cited By ~ 1

Author(s):

Gaind P. Pandey ◽

Joshua Adkins ◽

Lamartine Meda

Keyword(s):

High Performance ◽

Active Material ◽

Cycling Performance ◽

High Energy ◽

High Energy Density ◽

Shell Nanostructures ◽

Lithium Sulfur Batteries ◽

Carbon Coated ◽

Co Precipitation ◽

Lithium Sulfur

ABSTRACTLithium sulfide (Li2S) is one of the most attractive cathode materials for high energy density lithium batteries as it has a high theoretical capacity of 1166 mA h g-1. However, Li2S suffers from poor rate performance and short cycle life due to its insulating nature and polysulfide shuttle during cycling. In this work, we report a facile and viable approach to address these issues. We propose a method to synthesize a Li2S based nanocomposite cathode material by dissolving Li2S as the active material, polyvinylpyrrolidone (PVP) as the carbon precursor, and graphene oxide (GO) as a matrix to enhance the conductivity, followed by a co-precipitation and high-temperature carbonization process. The Li2S/rGO cathode yields an exceptionally high initial capacity of 817 mAh g-1 based on Li2S mass at C/20 rate and also shows a good cycling performance. The carbon-coated Li2S/rGO cathode demonstrates the capability of robust core-shell nanostructures for different rates and improved capacity retention, revealing carbon coated Li2S/rGO composites as an outstanding system for high-performance lithium-sulfur batteries.

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High-performance lithium sulfur batteries enabled by a synergy between sulfur and carbon nanotubes

Energy Storage Materials ◽

10.1016/j.ensm.2018.05.006 ◽

2019 ◽

Vol 16 ◽

pp. 194-202 ◽

Cited By ~ 74

Author(s):

Amir Abdul Razzaq ◽

Yuanzhou Yao ◽

Rahim Shah ◽

Pengwei Qi ◽

Lixiao Miao ◽

...

Keyword(s):

Carbon Nanotubes ◽

High Performance ◽

Lithium Sulfur Batteries ◽

Lithium Sulfur

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V2CTX Catalyzes Polysulfide Conversion to Enhance Redox Kinetics of Li−S Batteries

Dalton Transactions ◽

10.1039/d1dt04158d ◽

2022 ◽

Author(s):

Fengfeng Han ◽

Qi Jin ◽

Junpeng Xiao ◽

Lili Wu ◽

Xitian Zhang

Keyword(s):

Energy Storage ◽

Storage System ◽

Energy Storage System ◽

Redox Kinetics ◽

Lithium Sulfur Batteries ◽

The Future ◽

Kinetics Of ◽

Lithium Sulfur

Lithium–sulfur batteries (LBSs) have potential to become the future energy storage system, yet they are plagued by the sluggish redox kinetics. Therefore, enhancing the redox kinetics of polysulfide is a...

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An acetylene black modified gel polymer electrolyte for high-performance lithium–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/c9ta03123e ◽

2019 ◽

Vol 7 (22) ◽

pp. 13679-13686 ◽

Cited By ~ 28

Author(s):

Dezhi Yang ◽

Liang He ◽

Yu Liu ◽

Wenqi Yan ◽

Shishuo Liang ◽

...

Keyword(s):

Polymer Electrolyte ◽

High Performance ◽

Gel Polymer Electrolyte ◽

Dendrite Growth ◽

Acetylene Black ◽

Shuttle Effect ◽

Lithium Sulfur Batteries ◽

Lithium Dendrite ◽

Lithium Sulfur

An acetylene black modified gel polymer electrolyte was prepared to simultaneously solve the problems of shuttle effect and lithium dendrite growth for high-performance Li–S batteries.

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