严格的环保法规驱动下，煤矿在高盐矿井水回收处理上面临的挑战不断升级，因此迫切需要研发高效的深度脱盐技术，以突破行业困境并实现非常规水资源的利用。虽然流动电极电容去离子(FCDI)技术在脱盐领域内崭露头角，但仍存在电极材料性能造成的脱盐能力壁垒。研究提出了一种双重活化多孔碳氮电极材料制备的新方法，以蔗糖为碳源，三聚氰胺为氮源，整合了双模板法、水蒸气活化、酸浸氧化及氮掺杂的优点，改善了材料的润湿性和导电性，同时使得电极材料具备独特整齐排列的柱状结构、更大的比表面积(1 039.76 m²·g⁻¹)、更丰富的孔结构(0.32 cm³·g⁻¹)、更多的氮氧电负性点位和更好的润湿性能，以此实现高效，低能耗的矿井水脱盐。该材料(H₂O(g)-HNO₃/CN)应用于FCDI装置中且经过电压、活性材料含量、处理液初始浓度及pH的工艺优化后对1 g·L⁻¹的NaCl溶液脱盐5 h，除盐率高达100%，平均脱盐速率、脱盐量、电荷效率及标准脱盐量能耗分别为0.009 52 mg·(min·cm²)⁻¹，37.08 mg·g⁻¹，24.02%和481.98 J·mol⁻¹，即使经过7次循环吸脱附试验，除盐率仍能达到95.71%。为了探究H₂O(g)-HNO₃/CN的吸附除盐机理，进行了电化学性能、吸附动力学及等温线的分析。结果表明其比电容高达99.38 F·g⁻¹，内电阻极小；对Na⁺离子的吸附更符合伪二阶动力学模型和Langmuir等温线模型，对Na⁺离子的饱和吸附量为4.30 mg·g⁻¹，饱和吸附时间为120 min。

Driven by stringent environmental regulations, coal mines are facing escalating challenges in recycling and treating highly saline mine water, so highly efficient deep desalination technologies are urgently needed to break through the industry’s dilemmas and enable the utilization of non-conventional water resources. Although flow electrode capacitive deionization (FCDI) technology is emerging within the field of desalination, there is still a barrier to desalination capability due to electrode material properties. In this study, a new method for the preparation of dual-activated porous nitrogen-doped carbon electrode materials is proposed. Using sucrose as the carbon source and melamine as the nitrogen source, the advantages of the dual template method, water vapor activation, acid-impregnated oxidation, and nitrogen doping were integrated, and the wettability and conductivity of the materials were improved. Furthermore, the electrode material has a unique neatly arranged columnar structure, larger specific surface area (1 039.76 m²/g), richer pore structure (0.32 cm³/g), more nitrogen-oxygen electronegativity sites, and better wettability, which can be used to realize highly efficient and low-energy consumption desalination of mine water. The material (H₂O(g)-HNO₃/CN) was applied in the FCDI device and desalted 1 g·L⁻¹ NaCl solution for 5 h after process optimization of voltage, active material content, initial concentration of treatment solution and pH, and the desalination rate was as high as 100%, and the average desalination rate, desalination amount, charge efficiency and standard desalination energy consumption were 0.00952 mg/(min·cm²), 37.08 mg/g, 24.02% and 481.98 J/mol, respectively. Even after seven cycles of suction-desorption experiments, the desalination rate could still reach 95.71%. In order to investigate the adsorption and desalination mechanism of H₂O(g)-HNO₃/CN, the electrochemical properties, adsorption kinetics and isotherms were analyzed. The results showed that its specific capacitance was as high as 99.38 F/g and the internal resistance was extremely small; the adsorption of Na⁺ ions was more consistent with the pseudo-second-order kinetic model and Langmuir isotherm model, and the saturated adsorption amount of Na⁺ ions was 4.30 mg/g, and the saturated adsorption time was 120 min.