Exploration of the Exceptional Capacitive Deionization Performance of CoMn_(2)O_(4) Microspheres Electrode

作     者：Zhenzhen Liu Haibo Li Zhenzhen Liu;Haibo Li

作者机构：Ningxia Key Laboratory of Photovoltaic MaterialsNingxia UniversityYinchuan 750021China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第1期

页      面：119-128页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0702[理学-物理学] 

基　　金：This work was supported by the National Natural Science Foundation of China (No.21862016) Project of Ningxia key R&D plan (No.2017BY064) 

主　　题：capacitive deionization desalination electrosorption microspheres 

摘      要：The“battery typeinorganic electrode has been demonstrated the highly efficient sodium ion intercalation capacity for capacitive *** this work,the CoMn_(2)O_(4)(CMO)microspheres with porous core-shell structure are prepared via co-precipitation and followed by *** effects of annealing temperatures on the morphology,pore structure,valence state,and electrochemical behavior of CMO are *** electrode for capacitive deionization,the salt removal capacity and current efficiency of optimized AC||CMO device reaches up to 60.7 mg g^(−1) and 97.6%,respectively,and the capacity retention rate is 74.1%after 50 ***,both the in-situ X-ray diffraction and ex-situ X-ray diffraction analysis features that the intercalation/de-intercalation of sodium ions are governed by(103)and(221)crystal planes of ***,the density functional theory calculations realize that the adsorption energies of Na+onto(103)and(221)crystal planes are higher than that of any other crystal planes,manifesting the priorities in adsorption of sodium ***,the X-ray photoelectron spectra of pristine and post-CMO electrode highlights that the reversible conversion of Mn^(3+)/Mn^(4+)couple is resulted from the intercalation/de-intercalation of Na^(+),while this is irreversible for Co^(3+)/Co^(2+)*** that,the CMO electrode has been proven the selectivity removal of Na^(+) over K^(+)and Mg^(2+)in a multi-cation stream.