Advanced aqueous batteries with abundant global reserves, large discharge capacity and long life span are crucial research objectives. Herein, a kind of aqueous Zn-ion battery was fabricated with ultra-thin Ni-Mn nanosheet electrode and zinc foil. A simple H₂-annealing process was employed to handle the NiMn_xO_y nanosheets to form oxygen vacancy. Based on the formation of fast ion diffusion channels and the increase of active sites, the fabricated H-NiMn_xO_y nanosheet electrode displays an areal capacity of 0.68 mA h cm⁻² at a current density of 2 mA cm⁻² and an excellent cycling performance (almost no reduction after 6000 cycles). The fabricated H-NiMn_xO_y//Zn battery obtains a high areal capacity, up to 0.66 mA h cm⁻² at a current density of 4 mA cm⁻², and shows a long cycling stability (88.5% capacity retention after 5500 cycles). In particular, it has a high energy density, up to 1.13 mW cm⁻² at a power density of 3.34 mW cm⁻², more than many other similar devices. Thus, this research provides a new idea for the wide application of aqueous Zn-ion battery in intelligent equipment and electric vehicles.

具有丰富的全球储备，大放电容量和长寿命的先进水性电池是关键的研究目标。本文中，用超薄的Ni-Mn纳米片电极和锌箔制作了一种水性Zn离子电池。采用简单的H ₂退火工艺处理NiMn _x O _y纳米片，以形成氧空位。基于快速离子扩散通道的形成和活性位点的增加，制备的H-NiMn _x O _y纳米片电极在2 mA cm ^-2的电流密度下显示出0.68 mA h cm ^-2的面容量，并且具有出色的循环性能（6000次循环后几乎没有降低）。制作的H-NiMn_X ø _ý //锌电池获得高面积容量，高达0.66毫安高厘米^-2在4毫安cm 2的电流密度^-2，并示出了长的循环稳定性（88.5％的容量保持率5500次循环后）。特别是，它具有高能量密度，高达1.13毫瓦厘米^-2在3.34毫瓦厘米的功率密度^-2，比许多其它类似设备。因此，本研究为水基锌离子电池在智能设备和电动汽车中的广泛应用提供了新思路。