The rational design and construction of high-performance fiber-shaped NiCo//Fe batteries is of great importance for the development of portable and wearable electronics. Electrode materials with all hierarchical core-shell heterostructures have great potential for use in high-performance NiCo//Fe batteries as a result of their good conductivity, high mass loading, and short ion-diffusion paths. Herein is proposed a novel freestanding core-shell positive and negative electrode materials developed by depositing NiCoP nanosheets on nanoflake arrays ([email protected] NFAs) and Fe₂O₃ nanoneedles on TiN nanowire arrays ([email protected]₂O₃ NWAs) directly grown on carbon nanotube fibers (CNTFs). The fabricated [email protected] NFAs/CNTF was validated to be an ultrahigh capacity cathode (1.07 mAh cm^-2 at 2 mA cm^-2), matching well with the similarly constructed [email protected]₂O₃ NWAs/CNTF anode (0.92 mAh cm^-2 at 2 mA cm^-2). These electrodes were successfully developed into a high-performance NiCo//Fe battery that exhibited an extraordinary capacity of 0.77 mAh cm^-2 and a remarkable energy density of 265.2 mWh cm^-3. The flexible battery demonstrated an excellent cycling lifespan with 89.4% capacity retention after 4000 cycles. This pioneering study describes a powerful strategy for the rational construction of high-performance electrode materials with hierarchical core-shell heterostructures and constitutes a novel approach for the development of new-generation wearable aqueous rechargeable batteries.

高性能纤维状NiCo // Fe电池的合理设计和构造对于便携式和可穿戴电子产品的发展至关重要。具有所有分级核-壳异质结构的电极材料具有良好的导电性，高质量负载和较短的离子扩散路径，因此具有在高性能NiCo // Fe电池中使用的巨大潜力。本文提出了一种新颖的独立式核壳正负电极材料，该材料是通过在纳米薄片阵列（[受电子邮件保护的] NFA）上沉积NiCoP纳米片和在TiN纳米线阵列（[受电子邮件保护的] ₂ O ₃上）沉积Fe ₂ O ₃纳米针而开发的。NWA）直接生长在碳纳米管纤维（CNTF）上。所制造的[保护的电子邮件]的NFA / CNTF进行了验证是一种超高容量阴极（1.07毫安厘米^-2以2mA厘米^-2），与类似地构造[电子邮件保护]匹配以及_2个ö ₃ NWAS / CNTF阳极（0.92 mAh cm ^-2在2 mA cm ^-2处）。这些电极已成功开发为高性能NiCo // Fe电池，具有0.77 mAh cm ^-2的超常容量和265.2 mWh cm ^-3的出色能量密度。。柔性电池具有出色的循环寿命，在4000次循环后的容量保持率为89.4％。这项开创性研究为合理构造具有分层核-壳异质结构的高性能电极材料提供了有力的策略，并为开发新一代可穿戴水性充电电池提供了一种新颖的方法。