Constructing pseudocapacitance synergistic effect of cobalt phthalocyanine based anode with electronic delocalization for lithium-ion batteries

IF 5.6 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-10-11 DOI:10.1016/j.electacta.2025.147558

Meijuan Gu, Dongjun Lv, Weiqiang Kong, Xiaolei Zhang, Xiuping Li, Qiwei Tang, Jingjing Gao, Jianyu Shao

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Abstract

Metal phthalocyanines and naphthocyanines have wide application prospects as energy-storage material candidates. In this article, cobalt phthalocyanine (CoPc) and cobalt naphthalocyanine (CoNc) are assembled onto graphene oxide (GO) via π-π interactions and subsequently subjected to high-temperature calcination to synthesize Co₃O₄/N-doped graphene composites (Co₃O₄/N) for lithium ion batteries (LIBs) anodes. The results demonstrate that the cobalt naphthalocyanine/graphene oxide (CoNc/GO) composite exhibits significantly enhanced electrochemical performance as an anode material for LIBs. This enhancement is mainly attributed to the extended π-conjugated structure, which facilitates electronic delocalization and markedly improves electrical conductivity. Additionally, the composite constructs a pseudocapacitive synergistic effect, which further enhancing its overall electrochemical performance. The as-prepared CoNc/GO composite exhibits a high initial discharge capacity of 1502.4 mAh g⁻¹ and maintains 574 mAh g⁻¹ after 250 cycles at 100 mA g⁻¹, significantly exceeding that of the cobalt phthalocyanine/graphene oxide (CoPc/GO) composite. The improved lithium ion insertion/extraction efficiency is primarily attributed to enhanced electron delocalization and conductivity, suggesting that CoNc/GO composite exhibit greater potential for LIBs anodes.

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锂离子电池电子离域酞菁钴基阳极赝电容协同效应的构建

金属酞菁和萘菁作为储能材料具有广阔的应用前景。在本文中，酞菁钴（CoPc）和萘菁钴（CoNc）通过π-π相互作用组装在氧化石墨烯（GO）上，随后经过高温煅烧合成Co3O4/N掺杂石墨烯复合材料（Co3O4/N），用于锂离子电池（LIBs）阳极。结果表明，萘菁钴/氧化石墨烯（CoNc/GO）复合材料作为锂离子电池的负极材料表现出显著增强的电化学性能。这种增强主要是由于扩展的π共轭结构促进了电子离域，显著提高了电导率。此外，复合材料构建了赝电容协同效应，进一步提高了其整体电化学性能。所制备的CoNc/GO复合材料具有1502.4 mAh g - 1的高初始放电容量，并在100 mA g - 1下循环250次后保持574 mAh g - 1，显著优于酞菁钴/氧化石墨烯（CoPc/GO）复合材料。锂离子插入/提取效率的提高主要归功于电子离域和电导率的增强，这表明CoNc/GO复合材料具有更大的锂离子阳极潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochimica Acta 工程技术-电化学

CiteScore

11.30

自引率

6.10%

发文量

1634

审稿时长

41 days

期刊介绍： Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.