Zinc Complex Based Multifunctional Reactive Lithium Polysulfide Trapper Approaching Its Theoretical Efficiency

New Type ◽

Catalytic Effects ◽

Reactive Molecule

Abstract The “shuttle effect” of soluble lithium polysulfides (LPS), which causes rapid capacity fading, remains a lingering issue for lithium-sulfur batteries (LSBs). Herein, we report a new type of reactive molecule-based (or molecular) LPS trapper, zinc acetate-diethanolamine (Zn(OAc)2·DEA), which demonstrated a molecular efficiency of 1.8 for LPS trapping, approaching its theoretical limit of 2. This is the highest trapping capability among all reported LPS trappers. During discharge the trapped polysulfides are much more thermodynamically favored for reduction compared to the non-trapped ones, while during charge the complex Zn(SLi)2·DEA formed in the previous discharging process can be more easily oxidized due to its lower energy barrier in comparison to Li2S, indicating the catalytic effects of Zn2+·DEA on the redox of sulfur species. Zn(OAc)2·DEA is also an excellent binder owing to its multiple intermolecular hydrogen bonds. LSBs using Zn(OAc)2·DEA as a LPS trapper, a binder, and a redox catalyst exhibited excellent long-term cycling stability (with a capacity retention of 85% after 1000 cycles at a rate of 0.5 C) and enhanced rate performance. The work demonstrated the potential of this novel type of multifunctional metal complex-based reactive molecular LPS trappers for high capacity and stable LSBs.

WO3 Nanowire/Carbon Nanotube Interlayer as a Chemical Adsorption Mediator for High-Performance Lithium-Sulfur Batteries

Molecules ◽

10.3390/molecules26020377 ◽

2021 ◽

Vol 26 (2) ◽

pp. 377

Author(s):

Sang-Kyu Lee ◽

Hun Kim ◽

Sangin Bang ◽

Seung-Taek Myung ◽

Yang-Kook Sun

Keyword(s):

Structural Stability ◽

High Performance ◽

High Capacity ◽

Chemical Adsorption ◽

Electrochemical Testing ◽

Lithium Polysulfide ◽

A Cell ◽

Catalytic Effects ◽

We developed a new nanowire for enhancing the performance of lithium-sulfur batteries. In this study, we synthesized WO3 nanowires (WNWs) via a simple hydrothermal method. WNWs and one-dimensional materials are easily mixed with carbon nanotubes (CNTs) to form interlayers. The WNW interacts with lithium polysulfides through a thiosulfate mediator, retaining the lithium polysulfide near the cathode to increase the reaction kinetics. The lithium-sulfur cell achieves a very high initial discharge capacity of 1558 and 656 mAh g−1 at 0.1 and 3 C, respectively. Moreover, a cell with a high sulfur mass loading of 4.2 mg cm−2 still delivers a high capacity of 1136 mAh g−1 at a current density of 0.2 C and it showed a capacity of 939 mAh g−1 even after 100 cycles. The WNW/CNT interlayer maintains structural stability even after electrochemical testing. This excellent performance and structural stability are due to the chemical adsorption and catalytic effects of the thiosulfate mediator on WNW.

Facile synthesis of sulfur@titanium carbide Mxene as high performance cathode for lithium-sulfur batteries

Nanophotonics ◽

10.1515/nanoph-2019-0568 ◽

2020 ◽

Vol 9 (7) ◽

pp. 2025-2032

Author(s):

Fan Zhang ◽

Yunlei Zhou ◽

Yi Zhang ◽

Dongchan Li ◽

Zhichao Huang

Keyword(s):

Titanium Carbide ◽

High Performance ◽

High Capacity ◽

Shuttle Effect ◽

Lithium Polysulfide ◽

Potential Applications ◽

Sulfur Hosts ◽

Lithium Sulfur ◽

Sulfur Nanoparticles

AbstractThe design of sulfur hosts with polar, sulfurphilic, and conductive network is critical to lithium-sulfur (Li-S) batteries whose potential applications are greatly limited by the lithium polysulfide shuttle effect. Mxenes, possessing layered-stacked structures and high electrical conductivities, have a great potential in sulfur hosts. Herein, sulfur nanoparticles uniformly decorated on titanium carbide Mxene (S@Ti3C2Tx Mxene) are synthesized via a hydrothermal method and then utilized as a cathode for lithium-sulfur batteries. This unique architecture could accommodate sulfur nanoparticles expansion during cycling, suppress the shuttling of lithium polysulfide, and enhance electronical conductivity. Consequently, the S@Mxene with a high areal sulfur loading (∼4.0 mg cm−2) exhibits a high capacity (1477.2 mAh g−1) and a low capacity loss per cycle of 0.18% after 100 cycles at 0.2 C. This work may shed lights on the development of high performance sulfur-based cathode materials for Li-S batteries.

Sulfur nanoparticles/Ti3C2Tx MXene with optimum sulfur content as cathode for highly stable lithium-sulfur batteries

Dalton Transactions ◽

10.1039/d1dt00381j ◽

2021 ◽

Author(s):

Aoning Wang ◽

Yixuan Chen ◽

Li Liu ◽

Xiang Liu ◽

Zhoulu Wang ◽

...

Keyword(s):

Energy Density ◽

Titanium Carbide ◽

Capacity Fading ◽

Shuttle Effect ◽

Host Materials ◽

Lithium Polysulfide ◽

Sulfur Host ◽

Lithium Sulfur ◽

Sulfur Nanoparticles

Lithium-sulfur batteries have high theoretical energy density, but they need better sulfur host materials to retain lithium polysulfide shuttle effect which result in batteries’ capacity fading. Titanium carbide MXene (Ti3C2Tx...

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

Nano-Micro Letters ◽

10.1007/s40820-020-00477-3 ◽

2020 ◽

Vol 12 (1) ◽

Cited By ~ 3

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 ◽

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.

Three-Dimensionally Ordered Macroporous ZnO Framework as Dual-Functional Sulfur Host for High-Efficiency Lithium–Sulfur Batteries

Nanomaterials ◽

10.3390/nano10112267 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2267

Author(s):

Haisheng Han ◽

Tong Wang ◽

Yongguang Zhang ◽

Arailym Nurpeissova ◽

Zhumabay Bakenov

Keyword(s):

High Efficiency ◽

High Capacity ◽

Active Surface ◽

Active Surface Area ◽

Shuttle Effect ◽

Dual Functional ◽

Sulfur Host ◽

Ordered Macroporous ◽

A three-dimensionally ordered macroporous ZnO (3DOM ZnO) framework was synthesized by a template method to serve as a sulfur host for lithium–sulfur batteries. The unique 3DOM structure along with an increased active surface area promotes faster and better electrolyte penetration accelerating ion/mass transfer. Moreover, ZnO as a polar metal oxide has a strong adsorption capacity for polysulfides, which makes the 3DOM ZnO framework an ideal immobilization agent and catalyst to inhibit the polysulfides shuttle effect and promote the redox reactions kinetics. As a result of the stated advantages, the S/3DOM ZnO composite delivered a high initial capacity of 1110 mAh g−1 and maintained a capacity of 991 mAh g−1 after 100 cycles at 0.2 C as a cathode in a lithium–sulfur battery. Even at a high C-rate of 3 C, the S/3DOM ZnO composite still provided a high capacity of 651 mAh g−1, as well as a high areal capacity (4.47 mAh cm−2) under high loading (5 mg cm−2).

Electrostatic trapping of polysulfides enabled by imidazolium-based ionic polymers for high-energy-density lithium–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/c8ta01298a ◽

2018 ◽

Vol 6 (17) ◽

pp. 7375-7381 ◽

Cited By ~ 12

Author(s):

Zhibin Cheng ◽

Hui Pan ◽

Zhubing Xiao ◽

Dejian Chen ◽

Xiaoju Li ◽

...

Keyword(s):

Main Chain ◽

High Energy ◽

High Energy Density ◽

Ionic Polymers ◽

Shuttle Effect ◽

Effective Suppression ◽

Lithium Polysulfide ◽

Sulfur Cathodes ◽

A new lithium polysulfide (PS) trapping strategy based on electrostatic attraction between imidazolium groups and PSs has been demonstrated. Simple introduction of main-chain imidazolium-based ionic polymers into sulfur cathodes results in effective suppression of the PS shuttle effect, thus significantly improving cycling stability of lithium–sulfur batteries.

Enhanced performance of lithium–sulfur batteries based on single-sided chemical tailoring, and organosiloxane grafted PP separator

RSC Advances ◽

10.1039/d0ra02833a ◽

2020 ◽

Vol 10 (31) ◽

pp. 18115-18123

Author(s):

Haifeng Zhou ◽

Qunli Tang ◽

Qianer Xu ◽

Yan Zhang ◽

Cong Huang ◽

...

Keyword(s):

Rapid Development ◽

Shuttle Effect ◽

Lithium Polysulfide ◽

Even after a decade of research and rapid development of lithium–sulfur (Li–S) batteries, the infamous shuttle effect of lithium polysulfide is still the major challenge hindering the commercialization of Li–S batteries.

Exceptional lithium diffusion through porous aromatic framework (PAF) interlayers delivers high capacity and long-life lithium–sulfur batteries

Journal of Materials Chemistry A ◽

10.1039/d1ta07523c ◽

2022 ◽

Author(s):

Ehsan Ghasemiestahbanati ◽

Areeb Shehzad ◽

Kristina Konstas ◽

Caitlin J. Setter ◽

Luke A. O'Dell ◽

...

Keyword(s):

Coulombic Efficiency ◽

High Capacity ◽

Ion Diffusion ◽

Shuttle Effect ◽

Porous Aromatic Framework ◽

Porous Aromatic Frameworks ◽

Lithium Diffusion ◽

Residual Capacity ◽

Li Ion

Sulfonated porous aromatic frameworks (SPAFs) accelerate Li-ion diffusion while retarding the polysulfide shuttle effect in Li–S batteries. This leads to high residual capacity above 1000 mA h g−1 and coulombic efficiency (>99.5%) after 500 cycles.

Cubic MnSe2 microcube enabling high-performance sulfur cathode for lithium-sulfur batteries

Sustainable Energy & Fuels ◽

10.1039/d1se01263k ◽

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 ◽

Sulfur Cathodes ◽

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...

Pyrite FeS2–C composite as a high capacity cathode material of rechargeable lithium batteries

RSC Advances ◽

10.1039/c5ra18895d ◽

2015 ◽

Vol 5 (107) ◽

pp. 87847-87854 ◽

Cited By ~ 20

Author(s):

Dat T. Tran ◽

Hong Dong ◽

Scott D. Walck ◽

Sheng S. Zhang

Keyword(s):

Cathode Material ◽

Lithium Batteries ◽

High Capacity ◽

Rate Capability ◽

Rechargeable Lithium Batteries ◽

Capacity Fading ◽

Nucleophilic Reaction ◽

Lithium Polysulfide

A FeS2–C composite shows improved rate capability but still suffers from fast capacity fading due to either dissolution of lithium polysulfide in ether-based electrolytes or nucleophilic reaction of polysulfide anions in carbonate-based electrolytes.