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

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.

scholarly journals Sandwiching Sulfur into the Dents Between N, O Co-Doped Graphene Layered Blocks with Strong Physicochemical Confinements for Stable and High-Rate Li–S Batteries

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Mengjiao Shi ◽  
Su Zhang ◽  
Yuting Jiang ◽  
Zimu Jiang ◽  
Longhai Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
High Rate ◽  
Graphene Sheets ◽  
Rate Performance ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Doped Graphene ◽  
Sulfur Host ◽  
Co Doped

AbstractThe development of lithium–sulfur batteries (LSBs) is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect. Herein, an N, O co-doped graphene layered block (NOGB) with many dents on the graphene sheets is designed as effective sulfur host for high-performance LSBs. The sulfur platelets are physically confined into the dents and closely contacted with the graphene scaffold, ensuring structural stability and high conductivity. The highly doped N and O atoms can prevent the shuttle effect of sulfur species by strong chemical adsorption. Moreover, the micropores on the graphene sheets enable fast Li+ transport through the blocks. As a result, the obtained NOGB/S composite with 76 wt% sulfur content shows a high capacity of 1413 mAh g−1 at 0.1 C, good rate performance of 433 mAh g−1 at 10 C, and remarkable stability with 526 mAh g−1 at after 1000 cycles at 1 C (average decay rate: 0.038% per cycle). Our design provides a comprehensive route for simultaneously improving the conductivity, ion transport kinetics, and preventing the shuttle effect in LSBs.

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...

Suppression of polysulfide shuttling with a separator modified using spontaneously polarized bismuth ferrite for high performance lithium–sulfur batteries

2020 ◽  
Vol 8 (32) ◽  
pp. 16429-16436
Author(s):  
Hao Cheng ◽  
Huayun Liu ◽  
Han Jin ◽  
Ning Cai ◽  
Cheng Gao ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
High Performance ◽  
Bismuth Ferrite ◽  
Rate Performance ◽  
Cycle Stability ◽  
Lithium Sulfur Batteries ◽  
Anode Corrosion ◽  
Lithium Sulfur ◽  
Modified Separator

We report the suppression of polysulfide shuttling in a modified separator using spontaneously polarized BiFeO3 particles in a Li–S battery, with improved properties in terms of cycle stability, rate performance, reaction kinetics, self-discharge and anode corrosion.

Facile synthesis of Co3−xMnxO4/C nanocages as an efficient sulfur host for lithium–sulfur batteries with enhanced rate performance

2020 ◽  
Vol 49 (25) ◽  
pp. 8591-8600 ◽  
Author(s):  
Zexian Zhang ◽  
Shiyuan Zhou ◽  
Tao Mei ◽  
Yanzhuo Gou ◽  
Fanxuan Xie ◽  
...  
Keyword(s):  
Commercial Application ◽  
Rate Performance ◽  
Facile Synthesis ◽  
Shuttle Effect ◽  
Lithium Sulfur Batteries ◽  
Capacity Reduction ◽  
Sulfur Host ◽  
Lithium Sulfur

Capacity reduction mainly caused by the shuttle effect and low conductivity restricts the commercial application of lithium–sulfur batteries (LSBs).

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 Three-Dimensionally Ordered Macro/Mesoporous Nb2O5/Nb4N5 Heterostructure as Sulfur Host for High-Performance Lithium/Sulfur Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1531
Author(s):  
Haoxian Chen ◽  
Jiayi Wang ◽  
Yan Zhao ◽  
Qindan Zeng ◽  
Guofu Zhou ◽  
...  
Keyword(s):  
Mass Transfer ◽  
High Performance ◽  
Discharge Process ◽  
Transformation Mechanism ◽  
Shuttle Effect ◽  
Strong Adsorption ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur ◽  
Charge Discharge

The severe shuttle effect of soluble polysulfides hinders the development of lithium–sulfur batteries. Herein, we develop a three-dimensionally ordered macro/mesoporous (3DOM) Nb2O5/Nb4N5 heterostructure, which combines the strong adsorption of Nb2O5 and remarkable catalysis effect of Nb4N5 by the promotion “adsorption-transformation” mechanism in sulfur reaction. Furthermore, the high electrocatalytic activity of Nb4N5 facilitates ion/mass transfer during the charge/discharge process. As a result, cells with the S-Nb2O5/Nb4N5 electrode delivered outstanding cycling stability and higher discharge capacity than its counterparts. Our work demonstrates a new routine for the multifunctional sulfur host design, which offers great potential for commercial high-performance lithium–sulfur batteries.

Rational design of well-dispersed ultrafine CoS2 nanocrystals in micro–mesoporous carbon spheres with a synergistic effect for high-performance lithium–sulfur batteries

2020 ◽  
Vol 8 (21) ◽  
pp. 10885-10890 ◽  
Author(s):  
Zhanshuang Jin ◽  
Ming Zhao ◽  
Tianning Lin ◽  
Bingqiu Liu ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Mesoporous Carbon ◽  
High Performance ◽  
Rational Design ◽  
New Method ◽  
Rate Performance ◽  
Carbon Spheres ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

Micro–mesoporous carbon (MMC) embedded with well-dispersed ultrafine CoS2 (uCoS2) nanocrystals as an efficient sulfur host is prepared by a new method. As a result, a S/uCoS2@MMC cathode exhibits outstanding cycling stability and rate performance.

MWCNT porous microspheres with an efficient 3D conductive network for high performance lithium–sulfur batteries

2016 ◽  
Vol 4 (3) ◽  
pp. 775-780 ◽  
Author(s):  
Xiaomin Ye ◽  
Jie Ma ◽  
Yong-Sheng Hu ◽  
Huiying Wei ◽  
Fangfu Ye
Keyword(s):  
Carbon Nanotubes ◽  
High Performance ◽  
Conductive Network ◽  
Sulfur Cathode ◽  
Porous Microspheres ◽  
Lithium Sulfur Batteries ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Lithium Sulfur

A novel multi-walled carbon nanotubes microspheres were successfully prepared and applied to the sulfur cathode of lithium sulfur batteries.

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

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...

Sign in / Sign up

Export Citation Format

Share Document