Hydrothermal synthesis of porous TiO2 microspheres as an efficient sulfur host for enhanced lithium–sulfur batteries

A porous TiO2 particle is synthesized and used as a sulfur host. The obtained TiO2 material provides a large number of pores that can accommodate sulfur, and the porous structure also enables effective contact between the host material and lithium polysulfides. The TiO2/S electrode shows excellent electrochemical performance, exhibiting a capacity loss of 0.17% per cycle and a Coulombic efficiency of 97.7% during cycling at 0.5 C. The appealing results are due to the porous characteristics of the TiO2 material and the chemical adsorption between the TiO2 and lithium polysulfides.

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Porous TiO2−x with oxygen deficiency as sulfur host for lithium–sulfur batteries

Functional Materials Letters ◽

10.1142/s1793604721430049 ◽

2021 ◽

pp. 2143004

Author(s):

Yuman Yang ◽

Yi Zhang ◽

Meng Yang ◽

Xiangyu Zhao

Keyword(s):

Oxygen Deficiency ◽

Reversible Capacity ◽

Polar Compounds ◽

High Specific Surface Area ◽

Chemical Adsorption ◽

Sulfur Species ◽

Host Materials ◽

Lithium Sulfur Batteries ◽

Sulfur Host ◽

Lithium Sulfur

The dissolution and shuttle behavior of lithium polysulfides has been considered to be one of the serious problems restricting the development of lithium−sulfur (Li–S) batteries. Polar compounds are regarded as promising sulfur host materials due to their strong chemical adsorption to lithium polysulfides. Herein, polar TiO[Formula: see text] with porous structure is employed as the sulfur host, which has a high specific surface area and provides nanoconfined space for storage and adsorption of sulfur species. As a result, the as-prepared S@TiO[Formula: see text] cathode exhibits significantly enhanced reversible capacity, cycling stability, and reaction kinetics compared to those of the as-prepared S@TiO2 cathode.

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Multifunctional NiCo2O4 nanosheet-assembled hollow nanoflowers as a highly efficient sulfur host for lithium–sulfur batteries

Dalton Transactions ◽

10.1039/c9dt04936c ◽

2020 ◽

Vol 49 (20) ◽

pp. 6876-6883 ◽

Cited By ~ 2

Author(s):

Zhe Cui ◽

Shu-Ang He ◽

Qian Liu ◽

Rujia Zou

Keyword(s):

Catalytic Activity ◽

Electrochemical Performance ◽

Chemical Adsorption ◽

Highly Efficient ◽

Lithium Sulfur Batteries ◽

Sulfur Host ◽

Lithium Sulfur

A facile method is reported to synthesize NCOHF/S for Li–S battery, exhibiting superior electrochemical performance due to its efficient bifunction catalytic activity, chemical adsorption and excellent conductivity.

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Enhancing the performance of lithium–sulfur batteries by anchoring polar polymers on the surface of sulfur host materials

Journal of Materials Chemistry A ◽

10.1039/c6ta06863d ◽

2016 ◽

Vol 4 (41) ◽

pp. 16148-16156 ◽

Cited By ~ 37

Author(s):

Manfang Chen ◽

Xianyou Wang ◽

Siyu Cai ◽

Zhongyun Ma ◽

Peng Song ◽

...

Keyword(s):

Electrochemical Performance ◽

Carbon Materials ◽

Polar Polymers ◽

Host Materials ◽

Excellent Electrochemical Performance ◽

Lithium Sulfur Batteries ◽

Sulfur Host ◽

Triton X ◽

Lithium Sulfur ◽

Polar Polymer

Through anchoring polar polymer Triton X-100 on carbon materials, the MAC/S manifests excellent electrochemical performance as the cathode for Li–S batteries.

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MOF-derived NiO–NiCo2O4@PPy hollow polyhedron as a sulfur immobilizer for lithium–sulfur batteries

New Journal of Chemistry ◽

10.1039/c9nj04581c ◽

2019 ◽

Vol 43 (46) ◽

pp. 18294-18303 ◽

Cited By ~ 2

Author(s):

Fengchao Xu ◽

Bo Jin ◽

Huan Li ◽

Wentao Ju ◽

Zi Wen ◽

...

Keyword(s):

Discharge Capacity ◽

Coulombic Efficiency ◽

Cell Performance ◽

Initial Discharge Capacity ◽

Initial Discharge ◽

Lithium Sulfur Batteries ◽

Sulfur Host ◽

Initial Coulombic Efficiency ◽

Lithium Sulfur

A MOF-derived NiO–NiCo2O4@PPy hollow polyhedron is prepared as a sulfur host to effectively enhance cell performance. S/NiO–NiCo2O4@PPy displays a high initial discharge capacity of 963 mA h g−1 with a high initial coulombic efficiency of 95.2% at 0.2C.

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A sulfur host based on cobalt–graphitic carbon nanocages for high performance lithium–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/c7ta08483h ◽

2017 ◽

Vol 5 (47) ◽

pp. 24901-24908 ◽

Cited By ~ 48

Author(s):

Dengji Xiao ◽

Qian Li ◽

Huifang Zhang ◽

Yuanyuan Ma ◽

Chunxiang Lu ◽

...

Keyword(s):

High Performance ◽

Graphitic Carbon ◽

Chemical Adsorption ◽

Lithium Sulfur Batteries ◽

Physical Entrapment ◽

Sulfur Host ◽

Lithium Sulfur

This work improves the performance of Li–S batteries by providing both the physical entrapment and chemical adsorption of lithium polysulfides by the Co–graphitic nanocages.

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

10.26434/chemrxiv.8835728 ◽

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>

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A review of biomass materials for advanced lithium–sulfur batteries

Chemical Science ◽

10.1039/c9sc02743b ◽

2019 ◽

Vol 10 (32) ◽

pp. 7484-7495 ◽

Cited By ~ 42

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.

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