Understanding the Curvature Effect of FeCo Nanoalloy Encapsulated by Nitrogen‐Doped Carbon Nanotubes for High‐Performance Lithium–Sulfur Batteries DOI Open Access

Mengjing Jin,

Guowen Sun, Muxuan Li

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Well‐designed structures of the electrocatalyst provide excellent catalytic activity and high structural stability during sulfur reduction reaction Lithium–sulfur batteries (LSBs). In this study, a novel efficient structure is developed to encapsulate bimetallic FeCo nanoalloy catalysts within N‐doped carbon nanotube (NCNT) on nanofibers (FeCo@NCNT/CNFs) using combination electrospinning rapid‐cooling techniques. The NCNT matrix with abundant sites not only serves as pathway for electron transport reaction, but its encapsulation also acts armor protect nanoalloy. Further, curvature effect FeCo@NCNT facilitates greater transfer from NCNT, lowering barrier liquid–solid conversion process. As result, S/FeCo@NCNT/CNFs cathode can achieve exceptional cycle performance 500 cycles at 5 C, an ultra‐low capacity fade rate 0.031% per cycle. Moreover, even under extreme temperature conditions −20 80 °C, battery still delivers specific 827.16 697.46 mAh g −1 1 C. This work shows effective insight into enhancing LiPS kinetics over wide range in Li–S batteries.

Language: Английский

Tandemly promoting the sulfur redox kinetics through low concentration mixed organodiselenide and organoditelluride in Ah-level high-energy-density Li-S batteries DOI
Jiangqi Zhou, Chengyong Shu, Qianyu Zhang

et al.

Science China Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 13, 2024

Language: Английский

Citations

2
High Spin‐State Modulation of Catalytic Centers by Weak Ligand Field for Promoting Sulfur Redox Reaction in Lithium‐Sulfur Batteries DOI
Qing Li, Zhipeng Ma, Ming Liu

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

The spin state of transition-metal compounds in lithium-sulfur batteries (LSBs) significantly impacts the electronic properties and kinetics sulfur redox reactions (SRR). However, accurately designing remains challenging, which is crucial for understanding structure-performance relationship developing high-performance electrocatalysts. Herein, CoF

Language: Английский

Citations

1
Silica Hard Template Extracted from Semicoke Residue Toward the Hierarchical Porous Carbon Skeleton for Lithium–Sulfur Batteries DOI

Wenxing Miao,

Yangfei Hu,

Jingjiang Liu

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(15), P. 17493 - 17503

Published: July 31, 2024

The nitrogen-doped porous carbon skeleton is considered one of the effective structures to improve electrical conductivity sulfur cathode materials and mitigate shuttling soluble lithium polysulfides (LiPSs) in Li–S batteries (LSBs) due its outstanding conductivity, electrochemical stability, tunable pore size distribution. Here, we report a three-dimensional (a-NC) with high loading capacity (66.97%) as host LSBs through combination SiO2 microspheres extracted from oil shale semicoke residue hard template urea–formaldehyde resin nitrogen-containing precursor. This strategy can not only obtain hierarchical but also provide high-value utilization approach for residue. sulfur-loaded a-NC (S@a-NC) electrode obtained comparable performance S@s-NC electrodes based on templating agents prepared by Stöber method. Specifically, initial discharge 673 mAh g–1 at current density 1 C, stabilized 193.9 after 400 cycles an excellent cycling stability 81.5% over following 800 cycles, which attributed interconnected feature limiting unfavorable diffusion LiPSs highly defective structure, enhances adsorption polysulfides.

Language: Английский

Citations

0
Single‐Step PECVD Synthesis of Graphene@Carbon Nanotubes Electrocatalyst DOI Open Access

Chaoxu Hao,

Mai Li, Jinghui Yang

et al.

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Graphene (Gr) and carbon nanotubes (CNTs), the two intriguing nanomaterials, have presented great potential in serving as high-performance electrocatalysts lithium-sulfur (Li-S) chemistry. The concurrent management of both materials would achieve a promoted synergistic effect. Nevertheless, there still remains lack an effective material synthesis route. Herein, single-step plasma-enhanced chemical vapor deposition (PECVD) strategy is devised to prepare Gr@CNTs heterostructures with strong bonded connections. In PECVD system, damaged sidewalls generated CNT tubes can serve appropriate nucleation sites for further Gr growth. formation mechanisms are thoroughly explored aspects experimental characterizations theoretical calculations. To confirm validity this approach, thus-constructed architectures employed sulfur host, enabling boosted redox kinetics polysulfides. This project provides fundamental insight into mechanism exploration growth heterostructure, hence promoting practical application prospect nanomaterials toward Li-S systems.

Language: Английский

Citations

0
Insight into the polysulfides conversion kinetics and its activation energy relationship on ultrafine V8C7 in Li-S batteries DOI
Ziqi Zhao, Rongrong Liu,

Ranxiao Tang

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 156970 - 156970

Published: Oct. 1, 2024

Language: Английский

Citations

0
An Ionic Sieve‐Integrated Conductive Interfacial Design to Simultaneously Regulate the Zn2+ Flux and Interfacial Resistance for Advancing Zinc‐Ion Batteries DOI
Haobo Wang, Yutong Wu,

Qihong Xie

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 24, 2024

Abstract Zinc‐ion batteries possess operation safety, high energy density, production flexibility and affordability, making them attractive for scalable storage. While Zn anodes face significant challenges from rampant dendrite growth electrolyte‐related side‐reactions in a complex interfacial microenvironment. The growing resistance further degrades the battery performance. An integrated anode design is reported to regulate simultaneously 2+ flux through situ confinement of sieve, that is, 2D CuBDC metal–organic framework mesoporous carbonaceous host. with sub‐nanometer channels selected efficient dehydration directional transport, lowering nucleation barrier by zincophilic Cu(II) N sites. Conductive meso‐carbon reduces blocks side‐reactions. Resultantly, modified demonstrate improved cycling stability lower voltage polarization, supported operando optical microscopy ex analysis. This work provides feasible strategy improving aqueous new insights on designing advancing zinc batteries.

Language: Английский

Citations

0
Understanding the Curvature Effect of FeCo Nanoalloy Encapsulated by Nitrogen‐Doped Carbon Nanotubes for High‐Performance Lithium–Sulfur Batteries DOI Open Access

Mengjing Jin,

Guowen Sun, Muxuan Li

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 23, 2024

Abstract Well‐designed structures of the electrocatalyst provide excellent catalytic activity and high structural stability during sulfur reduction reaction Lithium–sulfur batteries (LSBs). In this study, a novel efficient structure is developed to encapsulate bimetallic FeCo nanoalloy catalysts within N‐doped carbon nanotube (NCNT) on nanofibers (FeCo@NCNT/CNFs) using combination electrospinning rapid‐cooling techniques. The NCNT matrix with abundant sites not only serves as pathway for electron transport reaction, but its encapsulation also acts armor protect nanoalloy. Further, curvature effect FeCo@NCNT facilitates greater transfer from NCNT, lowering barrier liquid–solid conversion process. As result, S/FeCo@NCNT/CNFs cathode can achieve exceptional cycle performance 500 cycles at 5 C, an ultra‐low capacity fade rate 0.031% per cycle. Moreover, even under extreme temperature conditions −20 80 °C, battery still delivers specific 827.16 697.46 mAh g −1 1 C. This work shows effective insight into enhancing LiPS kinetics over wide range in Li–S batteries.

Language: Английский

Citations

0