The nickel matrix has a significant impact on the structure and performance of a nickel–metal hydride (NiMH) battery. However, few studies have focused on the nickel matrix thus far due to the difficulty of fabricating controllable porous nickel materials. In addition, conventional nickel matrices show poor flexibility, making it difficult to fabricate flexible NiMH batteries. To achieve a high performance flexible NiMH battery, the fabrication of a thin, free‐standing, and flexible nickel matrix with an optimized pore structure is a key prerequisite. Here, a novel flexible porous nickel matrix with a controllable pore size, density, and distribution of pore position is developed by nickel electrodeposition on templates that are produced by silkscreen printing different insulating ink microarrays on stainless steel sheets. Benefitting from the excellent structure of the porous nickel matrix, flexible NiMH batteries are fabricated, which show excellent flexibility and very high energy densities of 151.8 W h kg⁻¹ and 508.5 W h L⁻¹ as well as high energy efficiencies of 87.9–98.5%. These batteries outperform conventional NiMH batteries and many other commercial batteries, holding great promise for their future practical application. The present strategy provides a new route to promote the development of nickel‐based alkaline rechargeable batteries.

中文翻译：

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可调节的独立式超薄多孔镍膜，用于高性能柔性镍金属氢化物电池

镍基体对镍金属氢化物（NiMH）电池的结构和性能具有重大影响。然而，由于难以制造可控的多孔镍材料，到目前为止，很少有研究集中在镍基体上。另外，常规的镍基体显示出差的柔韧性，使得难以制造柔性的NiMH电池。为了获得高性能的柔性镍氢电池，制造具有优化的孔结构的薄，自立且柔性的镍基体是关键的先决条件。在此，通过在模板上进行镍电沉积，开发了一种具有可控孔径，密度和孔位置分布的新型柔性多孔镍基体，该模板是通过在不锈钢板上丝网印刷不同的绝缘油墨微阵列而生产的。^-1和508.5 W h L ^-1以及87.9–98.5％的高能效。这些电池的性能优于传统的NiMH电池和许多其他商用电池，它们在未来的实际应用中具有广阔的前景。本策略为促进镍基碱性可充电电池的发展提供了一条新途径。