Atom-Thick Interlayer Made of CVD-Grown Graphene Film on Separator for Advanced Lithium–Sulfur Batteries

2017 ◽  
Vol 9 (50) ◽  
pp. 43696-43703 ◽  
Author(s):  
Zhenzhen Du ◽  
Chengkun Guo ◽  
Linjun Wang ◽  
Ajuan Hu ◽  
Song Jin ◽  
...  
Keyword(s):  
Graphene Film ◽  
Lithium Sulfur Batteries ◽  
Grown Graphene ◽  
Lithium Sulfur

Cellulose Separators with Integrated Carbon Nanotube Interlayers for Lithium-Sulfur Batteries: An Investigation into the Complex Interplay Between Cell Components

2019 ◽  
Author(s):  
Yu-Chuan Chien ◽  
Ruijun Pan ◽  
Ming-Tao Lee ◽  
Leif Nyholm ◽  
Daniel Brandell ◽  
...  
Keyword(s):  
Coulombic Efficiency ◽  
Solid Electrolyte Interphase ◽  
Holistic Approach ◽  
Cycle Life ◽  
Complex Interplay ◽  
Positive Electrodes ◽  
Lithium Sulfur Batteries ◽  
Cell Components ◽  
Redox Shuttle ◽  
Lithium Sulfur

This work aims to address two major roadblocks in the development of lithium-sulfur (Li-S) batteries: the inefficient deposition of Li on the metallic Li electrode and the parasitic "polysulfide redox shuttle". These roadblocks are here approached, respectively, by the combination of a cellulose separator with a cathode-facing conductive porous carbon interlayer, based on their previously reported individual benefits. The cellulose separator increases cycle life by 33%, and the interlayer by a further 25%, in test cells with positive electrodes with practically relevant specifications and a relatively low electrolyte/sulfur (E/S) ratio. Despite the prolonged cycle life, the combination of the interlayer and cellulose separator increases the polysulfide shuttle current, leading to reduced Coulombic efficiency. Based on XPS analyses, the latter is ascribed to a change in the composition of the solid electrolyte interphase (SEI) on Li. Meanwhile, electrolyte decomposition is found to be slower in cells with cellulose-based separators, which explains their longer cycle life. These counterintuitive observations demonstrate the complicated interactions between the cell components in the Li-S system and how strategies aiming to mitigate one unwanted process may exacerbate another. This study demonstrates the value of a holistic approach to the development of Li-S chemistry.<br>

Separator modified by Ketjen black for enhanced electrochemical performance of lithium–sulfur batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (17) ◽  
pp. 13680-13685 ◽  
Author(s):  
Di Zhao ◽  
Xinye Qian ◽  
Lina Jin ◽  
Xiaolong Yang ◽  
Shanwen Wang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Cathode Side ◽  
Electrochemical Performances ◽  
Lithium Sulfur Batteries ◽  
Enhanced Electrochemical Performance ◽  
Lithium Sulfur

A routine separator modified by a Ketjen black (KB) layer on the cathode side has been investigated to improve the electrochemical performances of Li–S batteries.

scholarly journals A review of biomass materials for advanced lithium–sulfur batteries

2019 ◽  
Vol 10 (32) ◽  
pp. 7484-7495 ◽  
Author(s):  
Huadong Yuan ◽  
Tiefeng Liu ◽  
Yujing Liu ◽  
Jianwei Nai ◽  
Yao Wang ◽  
...  
Keyword(s):  
Recent Progress ◽  
Low Cost ◽  
High Abundance ◽  
Chemical Adsorption ◽  
Environmental Friendliness ◽  
Lithium Sulfur Batteries ◽  
Biomass Materials ◽  
Physical And Chemical ◽  
Lithium Sulfur

This review summarizes recent progress of biomass-derived materials in Li–S batteries. These materials are promising due to their advantages including strong physical and chemical adsorption, high abundance, low cost, and environmental friendliness.

Repelling Polysulfide Ions by Boron Nitride Nanosheet Coated Separators in Lithium–Sulfur Batteries

2019 ◽  
Vol 2 (4) ◽  
pp. 2620-2628 ◽  
Author(s):  
Ye Fan ◽  
Dan Liu ◽  
Md Mokhlesur Rahman ◽  
Tao Tao ◽  
Weiwei Lei ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Boron Nitride Nanosheet ◽  
Lithium Sulfur Batteries ◽  
Polysulfide Ions ◽  
Lithium Sulfur

Calendering of free-standing electrode for lithium-sulfur batteries with high volumetric energy density

Carbon ◽  
2017 ◽  
Vol 111 ◽  
pp. 493-501 ◽  
Author(s):  
Pei-Yan Zhai ◽  
Jia-Qi Huang ◽  
Lin Zhu ◽  
Jia-Le Shi ◽  
Wancheng Zhu ◽  
...  
Keyword(s):  
Energy Density ◽  
Free Standing ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur
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