Application of W1.33CTz MXene obtained by hydrothermal etching as an additive to enhance the electrochemical energy storage properties of binder-free Ti3C2Tx MXene films

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-04-22 DOI:10.1039/d5dt00413f

Alexey Tsyganov, Maria Vikulova, Ilya Zotov, Evgenii V. Korotaev, Ilya Plugin, Victor Sysoev, Demid Kirilenko, Maxim Konstantinovich Rabchinskii, Artur Asoyan, Alexander V. Gorokhovsky, Nikolay Gorshkov

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引用次数: 0

Abstract

In this study, the electrochemical energy storage properties of Ti3C2Tx MXene films have been improved by the addition of W1.33CTz MXenes with ordered vacancies in their structure. W1.33CTz i-MXene was obtained from (W2/3Y1/3)2AlC i-MAX phase by etching in HCl/LiF mixture under hydrothermal conditions with following delamination by intercalation of tetramethylammonium ions. Ti3C2Tx/W1.33CTz composite electrode films were prepared from colloidal solutions, which were mixed in the appropriate ratio to achieve the W1.33CTz concentrations of 10, 20, 30 and 40 wt.%. MXenes were characterized by XRD, SEM, TEM and XPS methods. The electrochemical energy storage properties of binder-free MXene films were studied by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) methods. It has been shown that the addition of 20 wt.% W1.33CTz can significantly improve the pseudocapacitive intercalation of electrolyte ions. The specific capacitance of Ti3C2Tx/W1.33CTz (20 wt.%) electrodes in H2SO4, LiCl and KOH electrolytes was 375, 171 and 235 F•g-1, respectively, at a scan rate of 5 mV•s-1. The composite electrode showed good cycling stability (more than 93% capacity retention after 10,000 cycles). The results obtained indicated that the synthesised composite could be considered as a promising electrode material for energy storage systems.

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应用水热蚀刻法获得的 W1.33CTz MXene 作为添加剂，增强无粘结剂 Ti3C2Tx MXene 薄膜的电化学储能特性

在本研究中，通过在Ti3C2Tx MXene薄膜中加入W1.33CTz MXene，使其结构中具有有序空位，从而提高了薄膜的电化学储能性能。在水热条件下，在HCl/LiF混合物中蚀刻（W2/3Y1/3）2AlC i-MAX相中得到W1.33CTz i-MXene，然后通过插层四甲基铵离子分层。以胶体溶液为原料制备Ti3C2Tx/W1.33CTz复合电极膜，并将其按适当比例混合，使W1.33CTz的浓度分别为10、20、30、40 wt.%。采用XRD、SEM、TEM、XPS等方法对MXenes进行了表征。采用循环伏安法（CV）、恒流充放电法（GCD）和电化学阻抗谱法（EIS）研究了无粘结剂MXene薄膜的电化学储能性能。结果表明，添加20 wt.% W1.33CTz能显著改善电解质离子的赝电容插层。当扫描速率为5 mV•s-1时，Ti3C2Tx/W1.33CTz （20 wt.%）电极在H2SO4、LiCl和KOH电解质中的比电容分别为375、171和235 F•g-1。复合电极具有良好的循环稳定性（循环10000次后容量保持率超过93%）。结果表明，合成的复合材料可以被认为是一种有前途的储能系统电极材料。

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.