Mn-doped Ni-coordination supramolecular networks for binder-free high-performance supercapacitor electrode material

摘要: Abstract A new Mn-doped coordination supramolecular network (CSN) was synthesized on nickel foam directly by a simple one-step hydrothermal method. Compared with the pure CSN electrode (∼2.46 C cm−2 at 10 mA cm−2), this binder-free showed an ultrahigh areal capacity (∼8.12 C cm−2 10 mA cm−2). In addition, when current density increased from 10 mA cm−2 to 50 mA cm−2, it had good rate capability 73.33% capacitance retention. For practicality, asymmetrical supercapacitor (ASC) assembled Activated Carbon (AC) and electrode. The device not only could achieve maximum energy of 3.41 mW h cm−3 at power 44.98 mW cm−3, but also exhibit excellent stability after 4000 cycles, retention 90.14%. above results indicate that CSNs are promising materials for supercapacitors in storage.