Abstract Spongy-like α-Ni(OH)2 was rapidly prepared through microwave irradiation method. The spongy structure was identified to be of interspersed nanorods (2.5 nm thickness). Moreover, its mesoporus nature has made the α-Ni(OH)2 as an efficient electrode by revealing a specific capacity of 439 C g−1 at a specific current of 2 A g−1. Further, the α-Ni(OH)2//AC (activated carbon) supercapattery cell has been fabricated using polyurethane foam as separator. A specific capacitance of 246 F g−1 (2 A g−1) was estimated with the specific energy of 49 W h kg−1 and specific power of 696 W kg−1. The studied supercapattery cell could retain 87 % of capacity even after 2000 continuous charge-discharge cycles.

中文翻译：

---

海绵状结构 α-Ni(OH)2：用于超级电容器应用的简便快速合成

摘要 采用微波辐射法快速制备海绵状α-Ni(OH)2。海绵状结构被确定为散布的纳米棒（2.5 nm 厚）。此外，其介孔性质使 α-Ni(OH)2 成为一种有效的电极，在 2 A g-1 的特定电流下显示出 439 C g-1 的比容量。此外，α-Ni(OH)2//AC（活性炭）超级电池已使用聚氨酯泡沫作为隔膜制造。比电容为 246 F g-1 (2 A g-1)，比能量为 49 W h kg-1，比​​功率为 696 W kg-1。所研究的超级电池即使在 2000 次连续充放电循环后仍能保持 87% 的容量。