Preparation and Characterization of Ni/Al‐Layered Double Hydroxide

Abstract

The electrochemical behavior of chemically prepared α‐phase Al‐substituted normalNifalse(OH)2 was investigated in relation to its crystallinity. α‐Phase samples with 5–20% Al were prepared by precipitation, and the crystallinity was tailored by changing the metal/alkali ratio or the aging temperature. A highly crystallized sample was obtained without controlling the reaction pH. Both the utilization and half‐discharge potential increased as the sample crystallinity improved. A maximum capacity of 381 mAh/g and utilization of 190% were obtained. The crystallinity dependence of the cell performance was explained by the reduction of polarization because of a more ordered structure which led to a faster solid‐state reaction. © 1999 The Electrochemical Society. All rights reserved.

Layered double hydroxides of Ni with Cr and Mn as candidate electrode materials for alkaline secondary cells

“…The carbonates anchor the layers at an interlayer distance of 7.6 Å . Materials of this type with a composition of Ni A variety of Ni-based LDHs such as Ni-Al [4][5][6][7], Ni-Co [8][9][10], Ni-Fe [11][12][13] and Ni-Mn [14][15][16] have been studied as cathode materials. In each case, the LDHs have delivered superior charge storage capacities compared with b-nickel hydroxide.…”

Use of spray technique to prepare Ni/Al-layered double hydroxides

“…First, it has higher crystallinity. Contrary to ␤-Ni(OH) 2 , the utilization of Ni/Al-LDHs as active material for nickel electrode increases while the polarization in charge-discharge process decreases with the improvement in crystallinity [22]. Therefore, it has higher specific capacity and better electrochemical reversibility when compared to the sample with lower crystallinity.…”

Aluminum-based materials for advanced battery systems

“…Excess positive charge can make up for anions which are involved in the interslabs [215,216]. On account of the capacity for anions intercalation and exchange, LDH materials play a role in catalysis [217], magnetics [218,219], precursors to oxides [220], anion exchangers [221,222], and electrodes for rechargeable alkaline battery [223][224][225]. The representative cathode materials for alkaline battery include nickel hydroxide.…”