Flavanthrone: From Vat Dye to Organic Cathode Material for Rechargeable Lithium Batteries DOI
Taotao Cai, Xiaotang Gan, Gaofeng Li

и другие.

Energy & Fuels, Год журнала: 2024, Номер 38(17), С. 17045 - 17053

Опубликована: Авг. 24, 2024

Organic cathode materials (OCMs) hold significant promise as alternatives to transition-metal-based inorganic counterparts for constructing sustainable and efficient rechargeable batteries. However, it is a huge challenge overcome the dissolution problem at an affordable cost, especially small-molecule organic (SMOCMs). Herein, we investigated commercially available vat dye, namely, flavanthrone (FVT), directly novel SMOCM lithium It possesses low solubility benefiting from extensive aromatic system high theoretical capacity of 262 mAh g–1 based on four electroactive C═O/C═N groups. The four-electron redox reaction can be nearly fully utilized within voltage window 0.8–3.5 V, exhibiting two distinct stable potential plateaus 2.50 0.95 V versus Li+/Li. Within optimal 1.5–3.5 in electrolyte 1 M LiTFSI/G4 [LiTFSI, bis(trifluoromethanesulfonyl)imide; G4, tetraethylene glycol dimethyl ether], FVT effectively executes two-electron reaction, displaying discharge 2.5 reversible 131 g–1, retention 95% after 100 cycles. Furthermore, electrochemical fading mechanisms well influence varying windows electrolytes have been thoroughly elucidated, providing important insights that guide rational design SMOCMs' structures test conditions.

Язык: Английский

Trinaphthylenehexone: Toward High‐Energy and High‐Stability Small‐Molecule Quinone Cathode Materials DOI
Xiaotang Gan, Haodong Zhang,

Zijun Hu

и другие.

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract Sustainable and structurally designable organic cathode materials hold immense promise for rechargeable lithium batteries, yet the dissolution issue poses a significant challenge to their cycling stability. For small‐molecule (SMOCMs), extending π‐conjugated system is an effective method mitigate dissolution, however, remains huge if requiring high energy density affordable synthesis concurrently. Herein, novel quinone‐based SMOCM successfully synthesized though straightforward dehydrocyclization reaction of 1,4‐naphthoquinone (NQ), namely 5,6,11,12,17,18‐trinaphthylenehexone (TNHO). It boasts theoretical capacity 343 mAh g −1 (based on six‐electron reaction), which can be nearly completely utilized with two distinct discharge voltage plateaus at 2.55 2.10 V. The extensive grants TNHO exceptional insolubility in electrolyte. Within optimized window 0.8–3.8 V, achieves superior retention 76% after 800 cycles 100 , spanning duration half year. In addition excellent electrochemical performance, in‐depth investigation has also been conducted into causal chains linking window, dissolution–redeposition behavior, electrode structure evolution, insights obtained are crucial directing ongoing advancement SMOCMs.

Язык: Английский

Процитировано

0
Trithiocyanuric acid trilithium salt: A low-cost, high-energy, reduction-state organic cathode material based on disulfide bond DOI
Houjian Gong, Yan Han, Rui Wang

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162734 - 162734

Опубликована: Апрель 1, 2025

Язык: Английский

Процитировано

0
Flavanthrone: From Vat Dye to Organic Cathode Material for Rechargeable Lithium Batteries DOI
Taotao Cai, Xiaotang Gan, Gaofeng Li

и другие.

Energy & Fuels, Год журнала: 2024, Номер 38(17), С. 17045 - 17053

Опубликована: Авг. 24, 2024

Organic cathode materials (OCMs) hold significant promise as alternatives to transition-metal-based inorganic counterparts for constructing sustainable and efficient rechargeable batteries. However, it is a huge challenge overcome the dissolution problem at an affordable cost, especially small-molecule organic (SMOCMs). Herein, we investigated commercially available vat dye, namely, flavanthrone (FVT), directly novel SMOCM lithium It possesses low solubility benefiting from extensive aromatic system high theoretical capacity of 262 mAh g–1 based on four electroactive C═O/C═N groups. The four-electron redox reaction can be nearly fully utilized within voltage window 0.8–3.5 V, exhibiting two distinct stable potential plateaus 2.50 0.95 V versus Li+/Li. Within optimal 1.5–3.5 in electrolyte 1 M LiTFSI/G4 [LiTFSI, bis(trifluoromethanesulfonyl)imide; G4, tetraethylene glycol dimethyl ether], FVT effectively executes two-electron reaction, displaying discharge 2.5 reversible 131 g–1, retention 95% after 100 cycles. Furthermore, electrochemical fading mechanisms well influence varying windows electrolytes have been thoroughly elucidated, providing important insights that guide rational design SMOCMs' structures test conditions.

Язык: Английский

Процитировано

2