氟引导下2-甲基咪唑铜镍化合物的合成及电池超级电容器杂化物的温度控制

IF 9.4 1区 化学 Q1 CHEMISTRY, PHYSICAL
Tsung-Rong Kuo , Yi-Chun Cheng , Dong-Ching Chieh , Chutima Kongvarhodom , Sibidou Yougbaré , Muhammad Saukani , Hung-Ming Chen , Lu-Yin Lin
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引用次数: 0

摘要

镍基化合物由于其氧化还原活性和较高的理论电容而被广泛研究用于电池超级电容器杂化(BSHs),但其有限的电导率和结构不稳定性仍然是挑战。将铜纳入镍基系统是提高电子导电性和影响相形成的实用策略。使用含氟结构导向剂(SDAs)如NH4BF4和NH4HF2可以通过形成氟配合物来调节晶体生长、层间距离和表面性质。此外,在初始溶液过程中引入2-甲基咪唑与金属离子配位,有助于稳定前体配合物,支持均匀成核。这些化学试剂共同引导形成具有定制相组成的多孔纳米结构。本文以NH4BF4、NH4HF2和2-甲基咪唑为原料,采用溶液法合成镍铜化合物,并在不同温度下氧化。在300°C下合成的最佳Cu-Ni化合物(CuNi300)具有良好的形态,具有氢氧化物和氧化物的多相组成,在10 mV/s下的比电容(CF)为1026.0 F/g。CuNi300和碳电极组装的BSH在350 W/kg时能量密度达到82.95 Wh/kg,循环10000次后CF保留率为93.2%,库仑效率为89.4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fluorine-guided synthesis of copper nickel compounds with 2-methylimidazole and temperature control for battery supercapacitor hybrids

Fluorine-guided synthesis of copper nickel compounds with 2-methylimidazole and temperature control for battery supercapacitor hybrids
Nickel-based compounds are widely studied for battery supercapacitor hybrids (BSHs) due to their redox activity and high theoretical capacitance, but their limited conductivity and structural instability remain challenges. Incorporating copper into nickel-based systems is a practical strategy to enhance electronic conductivity and influence phase formation. The use of fluorine-containing structure-directing agents (SDAs) such as NH4BF4 and NH4HF2 can regulate crystal growth, interlayer distance, and surface properties through the formation of fluorine complexes. In addition, 2-methylimidazole is introduced to coordinate with metal ions during the initial solution process, which helps stabilize precursor complexes and support uniform nucleation. These chemical agents collectively guide the formation of a porous nanostructure with tailored phase composition. In this work, nickel copper compounds are synthesized by a solution process using NH4BF4, NH4HF2 and 2-methylimidazole, followed by oxidation at varied temperatures. The optimal Cu-Ni compound synthesized at 300 °C (CuNi300) exhibits a multiphase composition of hydroxides and oxides with favorable morphology, delivering a specific capacitance (CF) of 1026.0 F/g at 10 mV/s. A BSH assembled with CuNi300 and carbon electrodes achieves a maximum energy density of 82.95 Wh/kg at 350 W/kg, and a CF retention of 93.2% and Coulombic efficiency of 89.4% after 10,000 cycles.
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来源期刊
CiteScore
16.10
自引率
7.10%
发文量
2568
审稿时长
2 months
期刊介绍: The Journal of Colloid and Interface Science publishes original research findings on the fundamental principles of colloid and interface science, as well as innovative applications in various fields. The criteria for publication include impact, quality, novelty, and originality. Emphasis: The journal emphasizes fundamental scientific innovation within the following categories: A.Colloidal Materials and Nanomaterials B.Soft Colloidal and Self-Assembly Systems C.Adsorption, Catalysis, and Electrochemistry D.Interfacial Processes, Capillarity, and Wetting E.Biomaterials and Nanomedicine F.Energy Conversion and Storage, and Environmental Technologies
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