scholarly journals Confined Polysulfides in N-Doped 3D-CNTs Network for High Performance Lithium-Sulfur Batteries

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6131
Author(s):  
Donghuang Wang ◽  
Aijun Zhou ◽  
Zhujun Yao ◽  
Xinhui Xia ◽  
Yongqi Zhang
Keyword(s):  
Discharge Capacity ◽  
High Performance ◽  
Synergetic Effect ◽  
Three Dimensional ◽  
Utilization Efficiency ◽  
Lithium Sulfur Batteries ◽  
3D Architecture ◽  
Novel Strategy ◽  
Physical And Chemical ◽  
Lithium Sulfur

Improving the utilization efficiency of active materials and suppressing the dissolution of lithium polysulfides into the electrolyte are very critical for development of high-performance lithium-sulfur batteries. Herein, a novel strategy is proposed to construct a three-dimensional (3D) N-doped carbon nanotubes (CNTs) networks to support lithium polysulfides (3D-NCNT-Li2S6) as a binder-free cathode for high-performance lithium-sulfur batteries. The 3D N-doped CNTs networks not only provide a conductive porous 3D architecture for facilitating fast ion and electron transport but also create void spaces and porous channels for accommodating active sulfur. In addition, lithium polysulfides can be effectively confined among the networks through the chemical bond between Li and N. Owing to the synergetic effect of the physical and chemical confinement for the polysulfides dissolution, the 3D-NCNT-Li2S6 cathodes exhibit enhanced charge capacity and cyclic stability with lower polarization and faster redox reaction kinetics. With an initial discharge capacity of 924.8 mAh g−1 at 1 C, the discharge capacity can still maintain 525.1 mAh g−1 after 200 cycles, which is better than that of its counterparts.

scholarly journals A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium–sulfur batteries

2018 ◽  
Vol 6 (17) ◽  
pp. 7659-7667 ◽  
Author(s):  
Liu Luo ◽  
Sheng-Heng Chung ◽  
Arumugam Manthiram
Keyword(s):  
High Performance ◽  
Three Dimensional ◽  
High Loading ◽  
Graphene Aerogel ◽  
Free Standing ◽  
Lithium Sulfur Batteries ◽  
Self Assembled ◽  
Physical And Chemical ◽  
Sulfur Cathodes ◽  
Lithium Sulfur

A free-standing self-assembled graphene aerogel embedded with SnS2nano-dots (SnS2-ND@G) is established as an efficient substrate for high-loading sulfur cathodes with synergistically physical and chemical polysulfide-trapping capability.

A Novel Strategy for the Selection of Polysulfide Adsorbents Toward High‐Performance Lithium‐Sulfur Batteries

2019 ◽  
pp. 1900393 ◽  
Author(s):  
Xiaonan Shang ◽  
Tianfeng Qin ◽  
Pengqian Guo ◽  
Kai Sun ◽  
Hao Su ◽  
...  
Keyword(s):  
High Performance ◽  
Lithium Sulfur Batteries ◽  
Novel Strategy ◽  
Lithium Sulfur ◽  
Selection Of

Three-dimensional hollow reduced graphene oxide spheres with a hierarchically porous structure for high-performance lithium–sulfur batteries

2019 ◽  
Vol 6 (9) ◽  
pp. 2528-2538
Author(s):  
Mengxia Li ◽  
Ying Dai ◽  
Xinmei Pei ◽  
Wen Chen
Keyword(s):  
Graphene Oxide ◽  
Porous Structure ◽  
High Performance ◽  
Three Dimensional ◽  
Hierarchically Porous ◽  
Hierarchically Porous Structure ◽  
Reduced Graphene ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
High Sulfur Loading

A three-dimensional HrGO with a hierarchically porous structure was successfully synthesized as a sulfur-hosting material with high sulfur loading for high-performance lithium–sulfur batteries.

Fabrication of layered Ti3C2 with an accordion-like structure as a potential cathode material for high performance lithium–sulfur batteries

2015 ◽  
Vol 3 (15) ◽  
pp. 7870-7876 ◽  
Author(s):  
Xiaoqin Zhao ◽  
Min Liu ◽  
Yong Chen ◽  
Bo Hou ◽  
Na Zhang ◽  
...  
Keyword(s):  
Cathode Material ◽  
Discharge Capacity ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Initial Discharge Capacity ◽  
Capacity Retention ◽  
Initial Discharge ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

L-Ti3C2 was prepared by exfoliating Ti3AlC2 in 40% HF. With sulfur-loaded L-Ti3C2 as cathodes, Li–S batteries deliver a high initial discharge capacity of 1291 mA h g−1, an excellent capacity retention of 970 mA h g−1 and coulombic efficiency of 99% after 100 cycles.

scholarly journals Construction of Electrocatalytic and Heat-Resistant Self-Supporting Electrodes for High-Performance Lithium–Sulfur Batteries

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Xuemei Zhang ◽  
Yunhong Wei ◽  
Boya Wang ◽  
Mei Wang ◽  
Yun Zhang ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
High Performance ◽  
Structural Engineering ◽  
Utilization Efficiency ◽  
High Rate ◽  
Shuttle Effect ◽  
Electrocatalytic Effect ◽  
Lithium Sulfur Batteries ◽  
Engineering Strategy ◽  
Lithium Sulfur

Abstract Boosting the utilization efficiency of sulfur electrodes and suppressing the “shuttle effect” of intermediate polysulfides remain the critical challenge for high-performance lithium–sulfur batteries (LSBs). However, most of reported sulfur electrodes are not competent to realize the fast conversion of polysulfides into insoluble lithium sulfides when applied with high sulfur loading, as well as to mitigate the more serious shuttle effect of polysulfides, especially when worked at an elevated temperature. Herein, we reported a unique structural engineering strategy of crafting a unique hierarchical multifunctional electrode architecture constructed by rooting MOF-derived CoS2/carbon nanoleaf arrays (CoS2–CNA) into a nitrogen-rich 3D conductive scaffold (CTNF@CoS2–CNA) for LSBs. An accelerated electrocatalytic effect and improved polysulfide redox kinetics arising from CoS2–CNA were investigated. Besides, the strong capillarity effect and chemisorption of CTNF@CoS2–CNA to polysulfides enable high loading and efficient utilization of sulfur, thus leading to high-performance LIBs performed not only at room temperature but also up to an elevated temperature (55 °C). Even with the ultrahigh sulfur loading of 7.19 mg cm−2, the CTNF@CoS2–CNA/S cathode still exhibits high rate capacity at 55 °C.

Shape-controlled MnO2 as a sulfur host for high performance lithium–sulfur batteries

2020 ◽  
Vol 44 (26) ◽  
pp. 11365-11372
Author(s):  
You Ge ◽  
Ping Chen ◽  
Wenjing Zhang ◽  
Qi Shan ◽  
Yanan Fang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Network Structure ◽  
High Performance ◽  
Three Dimensional ◽  
Porous Network ◽  
Lithium Sulfur Batteries ◽  
One Step ◽  
Sulfur Host ◽  
Shape Controlled ◽  
Lithium Sulfur

The three-dimensional porous network structure self-assembled from birnessite-type MnO2 flakes and urchin-like structure composed of MnO2 nanotubes was fabricated by a convenient one-step hydrothermal method as the sulfur scaffold for high performance lithium–sulfur batteries.

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