Transition metal hydroxides (TMHs) are recently receiving increasing attention as anode materials for lithium-ion batteries (LIBs) because of their merits of high theoretical capacity, low cost, and easy preparation. Herein, hierarchical flower-like α-Ni(OH)₂ is synthesized by a facile homogeneous precipitation method with Ni(NO₃)₂·6H₂O and urea as raw materials. When evaluated as an anode material for lithium-ion batteries, the α-Ni(OH)₂ delivers a high reversible capacity of 1346 mA h g⁻¹ at a current density of 0.05 A g⁻¹, and gives a reversible capacity of 475 mA h g⁻¹ at a high current density of 5.0 A g⁻¹. It maintains a reversible capacity of 1227 mA h g⁻¹ after 30 cycles at 0.1 A g⁻¹, with a capacity retention of 97.0% compared to the second cycle. The charge storage mechanism and kinetics of the α-Ni(OH)₂ are analyzed by sweep voltammetry method and electrochemical impedance spectroscopy. The results demonstrate that the lithium ion storage process in the α-Ni(OH)₂ is mainly dominated by pseudocapacitive behavior, which is responsible for the superior rate capability; the charge-transfer resistance of the α-Ni(OH)₂ is sensitive to the state of charge; the apparent lithium ion diffusion coefficient of the α-Ni(OH)₂ varies in the range of 10⁻¹⁴–10⁻¹⁵ cm² s⁻¹.

过渡金属氢氧化物（TMHs）作为锂离子电池（LIBs）的负极材料，由于其理论容量高，成本低且易于制备的优点而受到了越来越多的关注。在此，以Ni（NO ₃）₂ ·6H ₂ O和尿素为原料，通过简便的均相沉淀法合成了分层的花状α - Ni（OH）₂。当被评估为锂离子电池的负极材料时，α- Ni（OH）₂在0.05 A g ^-1的电流密度下可提供1346 mA h g ^-1的高可逆容量，而可提供475 mA的可逆容量汞^-1在5.0 A g ^-1的高电流密度下。在0.1 A g ^-1的30个循环后，它可维持1227 mA h g ^-1的可逆容量，与第二个循环相比，其容量保持率为97.0％。通过扫描伏安法和电化学阻抗谱分析了α- Ni（OH）₂的电荷存储机理和动力学。结果表明，锂离子在α- Ni（OH）₂中的存储过程主要由拟电容行为决定，这是其优异的倍率性能的原因。α- Ni（OH）₂的电荷转移电阻对充电状态敏感；α- Ni（OH）₂的表观锂离子扩散系数在10 ^-14 –10 ^-15  cm ²  s ^-1范围内变化。