Excellent heterointerface combination can adjust energy band structure to reduce interface resistance, improve electron transfer rate and then play an important role in promoting the kinetics of redox reaction. In this work, a hierarchical core-shell structure with novel heterointerface of Co₉S₈ nanotubes coupling with NiMn oxide nanosheets is designed on flexible carbon cloth substrate (Co₉S₈@NiMn oxide/CC). Because of the NiMn oxide has higher conduction band and valence band than Co₉S_8, which facilitates the carrier migration. The electrons are easy to flow from NiMn oxide to Co₉S₈, and the holes can flow from Co₉S₈ to NiMn oxide. Along with the holes’ accumulation on NiMn oxide and electrons’ accumulation on the Co₉S₈, it is easy to form a built-in electric field. Meanwhile, the accumulation of the holes on NiMn oxide side makes NiMn oxide positively charged, which is in favor of OH⁻ adsorption and accelerating the reaction processes, and then promoting the electrochemical performance. At a current density of 1mA cm⁻², a high area capacitance of 5.34 F cm⁻² (741.7 μAh cm⁻²) was achieved. By photoirradiation, the area capacitance increases from 3.485 to 4.07 F cm⁻² at the current density of 5 mA cm⁻², which further proved that the excellent heterointerface combination due to the photoirradiation can induce effective photo-generated charge separation at the heterogeneous interface with suitable energy band matching, thus promoting the electrochemical redox reaction and effectively improving the electrochemical energy storage performance. The all-solid asymmetric supercapacitors (AAS) with Co₉S₈@NiMn oxide/CC as cathode and active carbon (AC) as anode can reach a high energy density of 44.6 W h kg⁻¹ (0.1472 mW h cm⁻²) at power density of 242.53 W kg⁻¹ (0.8 mW cm⁻²) and show an outstanding cycling stability. And the AAS device can serve as a power source for lighting up some electronic products, which indicates that as prepared nanotube arrays have practical application value.

优异的异质界面组合可以调整能带结构，降低界面电阻，提高电子转移速率，进而对促进氧化还原反应动力学起到重要作用。在这项工作中，在柔性碳布基底（Co ₉ S ₈ @NiMn 氧化物/CC）上设计了具有与NiMn 氧化物纳米片耦合的Co ₉ S ₈纳米管的新型异质界面的分级核壳结构。由于NiMn氧化物比Co ₉ S ₈具有更高的导带和价带_，这有利于载流子迁移。电子容易从NiMn氧化物流向Co ₉ S ₈，空穴可以从Co ₉流过S ₈到NiMn氧化物。随着空穴在NiMn氧化物上的积累和电子在Co ₉ S ₈上的积累，很容易形成内建电场。同时，NiMn氧化物侧空穴的积累使NiMn氧化物带正电，有利于OH ^-吸附和加速反应过程，进而提高电化学性能。在1mA cm ^-2的电流密度下，实现了5.34 F cm ^-2 (741.7 μAh cm ^-2 )的高面积电容。通过光照射，面积电容增加从3.485到4.07˚F厘米^-2以5mA厘米的电流密度^-2，进一步证明光辐照产生的优异异质界面组合可以在异质界面处诱导有效的光生电荷分离，并具有合适的能带匹配，从而促进电化学氧化还原反应，有效提高电化学储能性能。以 Co ₉ S ₈ @NiMn 氧化物/CC 为阴极，活性炭（AC）为阳极的全固态非对称超级电容器（AAS）可以达到 44.6 W h kg ^-1 (0.1472 mW h cm ^-2 )的高能量密度功率密度为 242.53 W kg ^-1 (0.8 mW cm ^-2) 并表现出出色的循环稳定性。并且AAS器件可以作为点亮一些电子产品的电源，表明所制备的纳米管阵列具有实际应用价值。