摘要
海水淡化电池兼具环保、节能和操作条件温和的优点,是一种极具应用潜力的下一代海水淡化技术。然而,海水淡化电池的发展受限于工作窗口合适、高除盐容量和循环稳定的储钠电极研发。为此,优化了海水淡化电池Na_(3)Fe_(2)(PO_(4))_(3)(NFP)新型储钠电极的合成温度,并进一步制备出PEDOT包覆的NFP(NFP@PEDOT)。实验表明,最优的煅烧温度为650℃,PEDOT包覆提高了电极的导电性,并抑制了NFP中铁离子的溶出。NFP@PEDOT展现出优异的海水淡化容量(即22.9 mAh/g)和循环稳定性,在100 mA/g下经历300次脱盐/再生循环后容量保持率仍可达80.8%。这提供了一种同时改善电极材料离子溶出和导电性的策略,有助于高性能海水淡化电池电极材料的研发。
Seawater desalination battery has been regarded as a promising technology for next generation seawater desalination due to its environmental friendliness,energy saving and mild operating conditions.However,its development is greatly limited by the viable Na-storage electrode materials with appropriate operating voltage windows,high desalination capacity and excellent cycle stability.Herein,the Na_(3)Fe_(2)(PO_(4))_(3)(NFP)with different morphologies was prepared via solid state reaction with controlled calcination temperature,and PEDOT coating was employed to improve the performance of NFP.The experimental results demonstrated that 650℃was the optimal calcination temperature and the NFP@PEDOT exhibited a high desalination capacity(22.9 mAh/g)and cycle stability(retained 80.8%of the desalination capacity after 300 cycles at 100 mA/g),which attributed to the improved conductivity and the inhibition of iron ion leaching from the electrode.This study provides a strategy to improve conductivity and the stability of electrode materials,which facilitates the development of high-performance desalination batteries.
作者
徐东川
李朝林
王文辉
XU Dong-chuan;LI Chao-lin;WANG Wen-hui(School of Civil and Environmental Engineering,Harbin Institute of Technology<Shenzhen>,Shenzhen 518055,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2022年第17期7-14,共8页
China Water & Wastewater
基金
深圳市高等院校稳定支持面上项目(GXWD20201230155427003-20200824094017001)
国家自然科学基金资助项目(52100084)。
关键词
海水淡化
海水淡化电池
储钠电极
PEDOT
磷酸铁钠
seawater desalination
desalination battery
Na-storage electrode
PEDOT
Na_(3)Fe_(2)(PO_(4))_(3)
