scholarly journals Microporous cyclodextrin film with funnel‐type channel polymerized on electrospun cellulose acetate membrane as separators for strong trapping polysulfides and boosting charging in lithium‐sulfur batteries

2021 ◽  
Author(s):  
Shuanglin Wu ◽  
Jiayi Shi ◽  
Xiaolin Nie ◽  
Yingmei Yao ◽  
Feng Jiang ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Cellulose Acetate Membrane ◽  
Lithium Sulfur Batteries ◽  
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>

Effect of the structure of cellulose acetate membranes on their permeability, electrical conductivity and rejection

1990 ◽  
Vol 55 (12) ◽  
pp. 2933-2939 ◽  
Author(s):  
Hans-Hartmut Schwarz ◽  
Vlastimil Kůdela ◽  
Klaus Richau
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Cellulose Acetate ◽  
Reverse Osmosis ◽  
Water Flux ◽  
Cellulose Acetate Membrane ◽  
Structure Parameters ◽  
Dc Electrical Conductivity ◽  
Cellulose Acetate Membranes

Ultrafiltration cellulose acetate membrane can be transformed by annealing into reverse osmosis membranes (RO type). Annealing brings about changes in structural properties of the membranes, accompanied by changes in their permeability behaviour and electrical properties. Correlations between structure parameters and electrochemical properties are shown for the temperature range 20-90 °C. Relations have been derived which explain the role played by the dc electrical conductivity in the characterization of rejection ability of the membranes in the reverse osmosis, i.e. rRO = (1 + exp (A-B))-1, where exp A and exp B are statistically significant correlation functions of electrical conductivity and salt permeation, or of electrical conductivity and water flux through the membrane, respectively.

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

Egg white derived carbon materials as an efficient sulfur host for high-performance lithium-sulfur batteries and its electrochemical properties

2021 ◽  
pp. 111310
Author(s):  
B.S. Reddy ◽  
M. Premasudha ◽  
Kwang-Moon oh ◽  
N.S. Reddy ◽  
Jou-Hyeon Ahn ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
High Performance ◽  
Carbon Materials ◽  
Egg White ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

Titanium Glycolate Nanorods with Unsaturated Sites as Multifunctional Layers for Advanced Lithium–Sulfur Batteries

2021 ◽  
Author(s):  
Peng Zeng ◽  
Hao Yu ◽  
Hong Liu ◽  
Yongfang Li ◽  
Ziyi Zhou ◽  
...  
Keyword(s):  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Titanium Glycolate
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