Tailoring C3N4 Host to Enable a High-Loading Iodine Electrode for High Energy and Long Cycling Zn–Iodine Battery

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-12-19 DOI:10.1021/acsenergylett.4c02930

Wenwen Cao, Tao Hu, Yuanyuan Zhao, Zhenglin Li, Yichan Hu, Cuncheng Li, Yiqiang Sun, Feng Ding, Guojin Liang

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Abstract

The high-energy-density zinc–iodine batteries (ZIBs) are hindered by low iodine loading in the cathode, which limited the specific capacity and energy density at the total electrode level. The unstable adsorption by the conventional host materials of the iodine electrode exacerbates the severe iodine shuttling and sluggish reaction kinetics. Here, we developed Br-doped carbon nitride (BrCN) nanosheets by using a chemical exfoliation strategy and doping engineering to obtain efficient iodine host materials for the iodine electrode. It eventually enhanced the adsorption force between BrCN and the iodine species, effectively stabilizing the high-loading iodine electrode and suppressing the polyiodide shuttle. As a result, BrCN-based host achieves an iodine mass loading of 14.1 mg cm^–2 of 46 wt % mass loading ratio (up to a maximum loading of 23.5 mg cm^–2), which achieves a high specific capacity of 97.0 mAh g^–1 and the energy density of 116.4 Wh kg^–1 based on the total iodine electrode.

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.