Entrapment and Reactivation of Polysulfides in Conductive Amphiphilic Covalent Organic Frameworks Enabling Superior Capacity and Stability of Lithium–Sulfur Batteries DOI

Chuanguang Wu,

Xiaorong Yan,

Haiping Yu

et al.

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

Published: Sept. 17, 2024

Abstract Inhibiting the shuttle of polysulfides is great significance for promoting practical application lithium–sulfur batteries (LSBs). Here, an imine‐linked covalent organic framework@carbon nanotube (COF@CNT) interlayer composed triazine and boroxine rings constructed between sulfur cathode separator reception reutilization. The introduction CNT imparts conductor characteristic to attributed electron tunneling in thin COF shell, creates a hierarchical porous architecture accommodating polysulfides. uniform distribution amphiphilic adsorption sites microporous structure not only enables efficient entrapment while allowing penetration Li + ions, but also provides stable electrocatalytic channel bidirectional conversion active achieve substantially improved capacity stability. interlayer‐incorporated LSBs deliver ultrahigh 1446 mA g −1 at 0.1C ultralow decay rate 0.019% 1C over 1500 cycles. Even electrolyte/sulfur ratio 6 µL mg , outstanding 995 mAh retention 74.1% 200 cycles 0.2C are obtained. This work offers compelling reactivation strategy stimulating study on ultra‐stable LSBs.

Language: Английский

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, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Abstract 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 2 , specifically Co 2+ with 3 d 7 electrons a high‐spin distribution (t 2g 5 e g ), were tailored predictably first time through weak coordination field effect F element. Both DFT calculations experimental results confirm that transitions from low‐ to configurations strongly interacts species Co−S Li−F bonds during SRR process. This interaction weakens S−S bond, promoting its facile cleavage both ends while also facilitating rapid uniform nucleation Li S /Li S, thus resulting LSBs capacity 447.7 mAh −1 at 10 C rates stable cycling 1000 cycles, an acceptable practical 585 high loading mass mg cm −2 . work achieves rational control active electron enriches application accelerate LSBs.

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
Covalent Organic Frameworks with Conductive EDOT Unit for Superior Lithium−Sulfur Batteries DOI

Diandian Han,

Wenliang Qin,

Mei Qiu

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: unknown, P. 110585 - 110585

Published: Dec. 1, 2024

Language: Английский

Citations

1
Wood fiber tailored Fe-O-C heterostructure to accelerate polysulfides conversion for lithium–sulfur batteries DOI
H. Wang, Yangyang Chen, Yu Liao

et al.

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 216, P. 118813 - 118813

Published: May 28, 2024

Language: Английский

Citations

0
Entrapment and Reactivation of Polysulfides in Conductive Amphiphilic Covalent Organic Frameworks Enabling Superior Capacity and Stability of Lithium–Sulfur Batteries DOI

Chuanguang Wu,

Xiaorong Yan,

Haiping Yu

et al.

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

Published: Sept. 17, 2024

Abstract Inhibiting the shuttle of polysulfides is great significance for promoting practical application lithium–sulfur batteries (LSBs). Here, an imine‐linked covalent organic framework@carbon nanotube (COF@CNT) interlayer composed triazine and boroxine rings constructed between sulfur cathode separator reception reutilization. The introduction CNT imparts conductor characteristic to attributed electron tunneling in thin COF shell, creates a hierarchical porous architecture accommodating polysulfides. uniform distribution amphiphilic adsorption sites microporous structure not only enables efficient entrapment while allowing penetration Li + ions, but also provides stable electrocatalytic channel bidirectional conversion active achieve substantially improved capacity stability. interlayer‐incorporated LSBs deliver ultrahigh 1446 mA g −1 at 0.1C ultralow decay rate 0.019% 1C over 1500 cycles. Even electrolyte/sulfur ratio 6 µL mg , outstanding 995 mAh retention 74.1% 200 cycles 0.2C are obtained. This work offers compelling reactivation strategy stimulating study on ultra‐stable LSBs.

Language: Английский

Citations

0