Microwave-assisted synthesis of spherical β-Ni(OH)2 superstructures for electrochemical capacitors with excellent cycling stability

- Spherical β-Ni(OH)2 have been synthesized by a simple template-free microwave method.
- Micro-sized spherical β-Ni(OH)2 consist of 2D nanosheets.
- The β-Ni(OH)2 demonstrates a high specific capacitance of 2147 F g−1.
- The electrode shows an outstanding cycling stability (99.5% retained after 2000 cycles).