Fabrication of layered double hydroxide by the liquid phase deposition

利用液体相位沉积（LPD）过程（LPD）过程对镍-氟复合体制备镍-氟复合体的最佳协调结构和作为沉积镍-铝离子离子交换属性的可量化地评估用于铝基二电池的工业应用的新位置材料的工业应用。[NiF 6-x-y（NH3）x（OH-）y]n+比[NiF 6] 4更适合作为在LDH反应中的Ni-Al LDH沉积的预校准剂，并改进的LDH反应实现了高纯度和高结晶性Ni-Al LDH的合成。所有替代的镍铝LDH--、Cl--、SO 42--和CH 3COO-中间CH 3COO-anions的倾斜角度约为15°。离子交换容量保持不变，pH >10的最小值为0.8 meq g-1，增加为pH减少，达到8 meq g-1的最大值为pH 2。阴离子交换的OH形式--Ni-Al LDH的中性化被加速，在添加剂中，阴离子交换容量和Ni-Al LDH的晶体可以被掺杂的铝离子的数量控制。

The optimum coordination structure of nickel-fluoro complexes for the preparation of Ni-Al layered double hydroxide(LDH) by liquid phase deposition(LPD) process and the diverse anion exchange properties of as-deposited Ni-Al on ・-alumina powder were quantitatively evaluated for the industrial application of new positive material for alkali secondary batteries. The [NiF6-x-y(NH3)x(OH-)y]n+ was more suitable than [NiF6]4- as the precursor of the deposition of Ni-Al LDH in the LPD reaction, and the improved LPD reaction achieved the synthesis of high purity and high crystallinity Ni-Al LDH. All anion-exchanged Ni-Al LDHs for OH--, Cl--, SO42--, and CH3COO--forms kept the high crystallinity and showed the enlargement of interlayer distances. The tilting angle of the intercalated CH3COO- anions was about 15°. Anion-exchange capacity remained constant at a minimum of 0.8meq g-1in pH >10, increased as pH decreased, and reached a maximum of8 meq g-1at pH 2. Anion-exchange of OH--form of Ni-Al LDH was accelerated by the neutralization of hydroxide ions in interlayers, in addition, the anion-exchange capacity and the crystallinity of Ni-Al LDH could be controlled by the amount of doped aluminum ions.