Super-reversible CuCl cathode enabled by Cu2+-coordinated alginate and carbon composite film for chloride ion battery

IF 5.5 3区材料科学 Q1 ELECTROCHEMISTRY

Electrochimica Acta Pub Date : 2025-06-06 DOI:10.1016/j.electacta.2025.146659

Tingting Yu , Zhenyu Wei , Weihai Li , Junjie Liu , Yingchun Miao , Xin Liang

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引用次数: 0

Abstract

Research on clean energy materials represents a necessary response to the urgent global needs for sustainable development and environmental impact mitigation. Chloride-ion batteries (CIBs) with metal chlorides as cathodes have been widely noticed due to their high theoretical gravimetric energy density. However, the significant volume changes during charging and discharging, the poor electrical conductivity and the dissolution of metal chlorides limit the application of metal chloride electrodes. Herein, a Cu²⁺-coordinated sodium alginate (SA)/carbon (C) layer can be formed on the surface of cuprous chloride (CuCl) particles by treating the ball-milled composite of CuCl, SA, and carbon material with water first and then with ethanol. After water treatment, the trace quantity of basic cupric chloride (Cu₂(OH)₃Cl) that is formed on the surface of CuCl particles facilitates the in-situ cross-linking with SA. Benefiting from the cross-linking of Cu²⁺ with SA and the chemical and hydrogen bonding between SA and graphene oxide (GO), the CuCl/SA-H₂O/GO cathode delivers a maximum initial discharge capacity of 248 mAh g⁻¹ (92 % of the theoretical capacity) at 100 mA g⁻¹ and retained a reversible capacity of 58 mAh g⁻¹ after 50 cycles.

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氯离子电池用Cu2+配位海藻酸盐与碳复合膜致能超可逆CuCl阴极

对清洁能源材料的研究是对可持续发展和减轻环境影响的全球迫切需要的必要回应。以金属氯化物为阴极的氯离子电池由于具有较高的理论重量能量密度而受到广泛关注。然而，充放电过程中体积变化大、导电性差以及金属氯化物的溶解等问题限制了金属氯化物电极的应用。本文通过先用水处理氯化亚铜（CuCl）、SA和碳材料的球磨复合材料，然后再用乙醇处理，可以在氯化亚铜（CuCl）颗粒表面形成Cu2+配位海藻酸钠(SA)/碳(C)层。水处理后，在CuCl颗粒表面形成微量的碱式氯化铜（Cu2(OH)3Cl），有利于与SA的原位交联。由于Cu 2 +与SA的交联以及SA与氧化石墨烯（GO）之间的化学键和氢键，CuCl/SA- h₂O/GO阴极在100 mA g⁻¹时的最大初始放电容量为248 mAh g⁻¹（理论容量的92%），并在50次循环后保持58 mAh g⁻¹的可逆容量。

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.