Ti₃C₂T_x (MXene) is considered as a superior electrode material for capacitive deionization (CDI) due to its high conductivity and two-dimensional structure. However, the electrochemical performance of pristine MXene nanosheets has been significantly impeded by the surface oxidation in the aqueous media and re-stacking caused by van der Waals forces which reduces the ions storage capacity. In this study, the chitosan-lignosulfonate/MXene (CLM) composite was used as a binder-free electrode to enhance the ion storage capacity and long-run cycling stability for hybrid capacitive deionization (HCDI). The chitosan-lignosulfonate nanospheres were able to increase the interlayer spacing between the MXene nanosheets effectively, which has significantly enhanced the ion storage capacity and electrochemical properties of the electrode. The binder-free CLM cathode demonstrated a high salt adsorption capacity of 44.6 mg g⁻¹ and a maximum average salt adsorption rate of 5.8 mg g⁻¹ min⁻¹ at 1.2 V. A high cycling stability above 97 % for 30 cycles was observed. Also, the long-term stability of CLM electrode was studied by X-ray photoelectron spectroscopy (XPS) and the results showed that the CLM electrode was not prone to surface oxidation after 30 cycles. This study can guide future development of high-performance 2D material composite electrodes for enhancing capacitive deionization efficiency.

Ti ₃ C ₂ T _{x (MXene)}由于其高电导率和二维结构而被认为是电容去离子(CDI)的优异电极材料。然而，原始 MXene纳米片的电化学性能受到水介质中的表面氧化和范德华力引起的重新堆积的显着阻碍，从而降低了离子存储容量。在这项研究中，壳聚糖-木质素磺酸盐/MXene（CLM）复合材料被用作无粘合剂电极，以增强混合电容去离子（HCDI）的离子存储容量和长期循环稳定性。壳聚糖-木质素磺酸盐纳米球能够有效增加MXene纳米片之间的层间距，从而显着增强电极的离子存储容量和电化学性能。无粘合剂的 CLM 阴极在 1.2 V 下表现出 44.6 mg g ^{-1的高盐吸附容量和 5.8 mg g -1}  min ^-1的最大平均盐吸附率。观察到 30 个循环的循环稳定性高于 97% 。此外，通过X射线光电子能谱（XPS）研究了CLM电极的长期稳定性，结果表明CLM电极在30次循环后不易出现表面氧化。该研究可以指导未来高性能二维材料复合电极的开发，以提高电容去离子效率。