Synthesis and Electrochemical Properties of Hierarchical Porous (Nickel/Cobalt)‐Carbonate‐Hydroxide Structures
作者:Chuankang Shu、Ying Liang、Zhen Zhang、Bin Fang
DOI:10.1002/ejic.202100057
日期:2021.5.7
Hierarchical porous Ni3(CO3)(OH)4 and (NixCo1‐x)6(CO3)2(OH)8 ⋅ H2O (x=0, 1/3, 1/2, and 2/3) structures have been synthesized via a hydrothermal route. The chloride ions in the precursor play an important role in the morphology of (Ni,Co)6(CO3)2(OH)8 ⋅ H2O. The formation mechanism and growth process of urchin‐like (Ni,Co)6(CO3)2(OH)8 ⋅ H2O structure was investigated by adjusting the reaction time. The
分级多孔的Ni 3(CO 3)(OH)4和(镍X钴1- X)6(CO 3)2(OH)8 ⋅ħ 2 O(X = 0,1/3,1/2,和2 / 3)结构是通过水热途径合成的。前体中的氯离子起到的形态具有重要作用的(Ni,Co)的6(CO 3)2(OH)8 ⋅ħ 2 O的形成机制和生长的过程海胆状的(Ni,Co)的6(CO 3)2(OH)8 ⋅ħ 2通过调节反应时间为O结构进行了研究。产品的电化学性质取决于化学组成和表面性质。Ni 3(CO 3)(OH)4由于其多孔结构和较大的比表面积而在低电流密度下显示出较高的比电容。但是,其速率特性和循环稳定性差得多。共6(CO 3)2(OH)8 ⋅ħ 2 ö纳米棒组装结构具有较好的循环性能,但较低的比电容。(Ni,Co)6(CO 3)2(OH)8 ⋅ħ 2 O电极的行为改善的速率特性和循环稳定性在用Ni的比较3(CO 3)(OH)4,和更高的比电容比Co