Nickel oxide (NiO) holds great promise as a high-capacity anode material for rechargeable lithium-ion batteries. However, the major concern is the tremendous stresses and volume changes associated with repeated lithium insertion/extraction processes, leading to poor capacity retention and rate capability. To circumvent this problem, we demonstrate a rational design for the fabrication of multilayered NiO submicron flakes using a selective chemical etching strategy followed by a calcination treatment. When serving as lithium storage anodes, the multilayered NiO submicron flakes exhibit excellent cycling stability and rate capability, with a high reversible lithium extraction specific capacity of 532 mAh g⁻¹ at a current rate of 0.6 C (1 C = 718 mA g⁻¹) and a Coulombic efficiency close to 100% after 630 deep cycles. Even at an extremely high current rate of 120 C (i.e., 86,160 mA g⁻¹), a suitable capacity of 61 mAh g⁻¹ is still attained. Moreover, the electrodes also show superiority in function at high temperature (55 °C), delivering stable reversible capacities of 646 and 581 mAh g⁻¹ at 0.2 and 0.4 C, respectively, after 50 cycles. Moreover, the post morphologies and compositions after long cycles are finally determined to demonstrate the efficient lamellar structure of the multilayers. This strategy provides a new avenue for designing various multilayered metal oxides and/or hybrid materials for use in energy storage and other related applications.

氧化镍 (NiO) 作为可充电锂离子电池的高容量阳极材料具有广阔前景。然而，主要问题是与重复的锂插入/提取过程相关的巨大应力和体积变化，导致容量保持率和倍率性能差。为了避免这个问题，我们展示了使用选择性化学蚀刻策略然后进行煅烧处理来制造多层 NiO 亚微米薄片的合理设计。当用作储锂负极时，多层 NiO 亚微米薄片表现出优异的循环稳定性和倍率性能，在 0.6 C 的电流速率下具有 532 mAh g ^{-1的高可逆锂提取比容量（1 C = 718 mA g -1}) 和 630 次深循环后库仑效率接近 100%。即使在 120 C（即86,160 mA g ^-1 ）的极高电流速率下，仍可获得 61 mAh g ^-1的合适容量。此外，该电极在高温（55°C）下也表现出优越的功能，在 0.2 和 0.4 C 下循环 50 次后，分别提供 646 和 581 mAh g ^{-1的稳定可逆容量。}此外，最终确定了长循环后的后形态和组成，以证明多层的有效层状结构。该策略为设计用于储能和其他相关应用的各种多层金属氧化物和/或混合材料提供了新途径。