Electrochemical performance of multi-element doped α-nickel hydroxide prepared by supersonic co-precipitation method

Structure and electrochemical properties of nanometer Cu substituted α-nickel hydroxide

“…8. The linear relationship between I P and y 1/2 indicates that the electrode reaction is controlled by proton diffusion [20,21]. For the electrode system controlled by diffusion process, according to Randle-Sevick equation [22], at room temperature (25 8C), anodic peak current I P and the scan rate y meet the following relationship:…”

The relationship between structural stability and electrochemical performance of multi-element doped alpha nickel hydroxide

“…With the increase of doped ion ratio, more anion (such as SO 4 2À , CO 3 2À ) inserts NiO 2 interlayer to compensate for charge excess. This phenomenon enhances the interlayer spacing and plays an important role on keeping the stability of alpha nickel hydroxide [11,16,19,21]. Futhermore, there is no characteristic peak for Al(OH) 3 , Mn(OH) 2 and Yb(OH) 3 .…”

“…The linear relationship between I p and v 1/2 indicates that the electrode reaction is controlled by proton diffusion [12,17]. According to RandleeSevcik equation [16,19], the anodic peak current I p and the scan rate v of the electrode system controlled by diffusion process follows the following relationship at room temperature (25 C):…”

“…Usually, the stabilized aNi(OH) 2 can be prepared by doping metal elements in nickel salt solution, such as Al [5e8], Mn [9,10], Zn [11], Cu [12], Fe [13], Yb [14], Y [15], while the prepared sample is b-Ni(OH) 2 without doping metal elements. Recent studies have shown that the structural stability and electrochemical performance for multi-doped a-Ni(OH) 2 are better than that for mono-doped a-Ni(OH) 2 [16]. In order to improve properties of nickel hydroxide, numerous studies have been carried out by partial substitution of Ni ion by two elements ions, such as AleY [17], CoeZn [18], AleCu [19], AleCo [20].…”

Influence of Na2CO3on structure and electrochemical properties of nanometre Co substituted nickel hydroxide

“…5 Researchers at home and abroad have done a lot of studies to prepare stabilised a-Ni(OH) 2 . To prepare stable a-nickel hydroxide, partial substitution of Ni ions in Ni(OH) 2 lattice with Al, 3,6 Co, 7,8 Mn, 9 Cu, 10 Zn, 11 Fe, 12 Y 13 or multielement 14,15 has been extensively employed.…”