For high performance supercapacitors, novel hierarchical yolk-shell α-Ni(OH)₂/Mn₂O₃ microspheres were controllably synthesized using a facile two-step method based on the solvothermal treatment. The unique α-Ni(OH)₂ based yolk-shell microstructures decorated with numerous interconnected nanosheets and the heterocomposition features can synergistically enhance reactive site exposure and electron conduction within the microspheres, facilitate charge transfer between electrolyte and electrode materials, and release structural stress during OH⁻ chemisorption/desorption. Moreover, the Mn₂O₃ sediments distributed over the α-Ni(OH)₂ microspheres can serve as an effective protective layer for electrochemical reactions. Consequently, when tested in 1 mol·L⁻¹ KOH aqueous electrolyte for supercapacitors, the yolk-shell α-Ni (OH)₂/Mn₂O₃ microspheres exhibited a considerably high specific capacitance of 2228.6 F·g⁻¹ at 1 A·g⁻¹ and an impressive capacitance retention of 77.7% after 3000 cycles at 10 A·g⁻¹. The proposed α-Ni(OH)₂/Mn₂O₃ microspheres with hetero-composition and unique hierarchical yolk-shell microstructures are highly promising to be used as electrode materials in supercapacitors and other energy storage devices.

对于高性能超级电容器，基于溶剂热处理的一种简便的两步法可控地合成了新型的蛋黄壳分层α - Ni（OH）₂ / Mn ₂ O ₃微球。独特的基于α- Ni（OH）₂的卵黄壳微结构，上面装饰有许多相互连接的纳米片，并且具有异质组成特征，可以协同增强微球内的反应位点暴露和电子传导，促进电解质和电极材料之间的电荷转移，并在释放过程中释放结构应力OH ^-吸附/解吸。此外，Mn ₂ O ₃沉积在α- Ni（OH）₂微球上的沉积物可以充当电化学反应的有效保护层。因此，当在超级电容器的1mol·L - ¹ KOH水性电解质中进行测试时，卵黄壳α - Ni（OH）₂ / Mn ₂ O ₃微球在1 A时具有2228.6 F·g ^-1的相当高的比电容。·g ^-1，在10 A·g ^{-1的条件下}经过3000次循环后的电容保持率达到了77.7％。提出的α- Ni（OH）₂ / Mn ₂ O ₃ 具有异质组成和独特的分层卵黄壳微结构的微球极有希望被用作超级电容器和其他能量存储设备中的电极材料。