Volume 63, Issue 25 e202405427
Research Article

Commercializable Naphthalene Diimide Anolytes for Neutral Aqueous Organic Redox Flow Batteries

Xu Liu

Xu Liu

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

These authors contributed equally to this work.

Search for more papers by this author
Heng Zhang

Heng Zhang

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

These authors contributed equally to this work.

Search for more papers by this author
Chenjing Liu

Chenjing Liu

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

Search for more papers by this author
Zengrong Wang

Zengrong Wang

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

Search for more papers by this author
Xuri Zhang

Xuri Zhang

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

Search for more papers by this author
Haiyan Yu

Haiyan Yu

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

Search for more papers by this author
Yujie Zhao

Yujie Zhao

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

Search for more papers by this author
Prof. Dr. Ming-Jia Li

Prof. Dr. Ming-Jia Li

School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081 China

Search for more papers by this author
Prof. Dr. Yinshi Li

Prof. Dr. Yinshi Li

National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049 China

Search for more papers by this author
Prof. Dr. Ya-Ling He

Prof. Dr. Ya-Ling He

National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049 China

Search for more papers by this author
Prof. Dr. Gang He

Corresponding Author

Prof. Dr. Gang He

Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Engineering Research Center of Key Materials for Efficient Utilization of Clean Energy of Shaanxi Province, Xi'an Photoelectromagnetic Functional Materials International Science and Technology Cooperation Center, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054 China

National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710049 China

Search for more papers by this author
First published: 11 April 2024
Citations: 12

Graphical Abstract

This work proposed the hydrothermal synthesis methodology for the preparation of high-performance naphthalene diimide materials on a hundred-gram scale, and showed great commercial potential offering cost-effective production. Under the synergistic effects of π–π stacking and H-bonding networks, naphthalene diimide delivered excellent battery performance including high capacity/power, and long lifetime.

Abstract

Neutral aqueous organic redox flow batteries (AORFBs) hold the potential to facilitate the transition of renewable energy sources from auxiliary to primary energy, the commercial production of anolyte materials still suffers from insufficient performance of high-concentration and the high cost of the preparation problem. To overcome these challenges, this study provides a hydrothermal synthesis methodology and introduces the charged functional groups into hydrophobic naphthalene diimide cores, and prepares a series of high-performance naphthalene diimide anolytes. Under the synergistic effect of π–π stacking and H-bonding networks, the naphthalene diimide exhibits excellent structural stability and the highest water solubility (1.85 M for dex-NDI) reported to date. By employing the hydrothermal method, low-cost naphthalene diimides are successfully synthesized on a hundred-gram scale of $0.16 g−1 ($2.43 Ah−1), which is also the lowest price reported to date. The constructed full battery achieves a high electron concentration of 2.4 M, a high capacity of 54.4 Ah L−1, and a power density of 318 mW cm−2 with no significant capacity decay observed during long-duration cycling. These findings provide crucial support for the commercialization of AORFBs and pave the way for revolutionary developments in neutral AORFBs.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.