Hollow nickel-cobalt-manganese hydroxide polyhedra via MOF templates for high-performance quasi-solid-state supercapacitor

By Yu Du, Guangyu Li, Mengdan Chen, Xiaohong Yang, Lin Ye, Xu Liu, Lijun Zhao. 2019

152 citations recorded by the source corpus.

Abstract Constructing high specific area and porous micro-nano frameworks is suitable for fast electrons/ions transport, which motivates us to design hollow polyhedra with multi-order structure. However, the synthesis route of hollow polyhedra is still restricted due largely to the complexity and high cost. Herein, the finding in rational design and one-pot hydrothermal synthesis of porous hollow nickel-cobalt-manganese hydroxide (NiCoMn-OH) polyhedra is reported, using zeolitic imidazolate framework-67 (ZIF-67) as the templates. The ultrathin edge-to-face stacking nanosheets construct a three-dimensional multi-order hollow polyhedral structure with internal nanoporous channels, which can stimulate electron/ion transfer. Toward the application in supercapacitor, the NiCoMn-OH electrode presented superior capacitance performance (1654.5 F g−1 at 1 A g−1) and excellent rate performance (58.5% retention at 30 A g−1) in a three electrode alkaline system. Moreover, the quasi-solid-state NiCoMn-OH//AC device was also fabricated, exhibiting excellent capacitance of 121.5 F g−1 at 1 A g−1, high energy density of 43.2 Wh kg−1 at a power density of 0.79 kW kg−1, and outstanding capacitance retention (100% retention after 10,000 cycles). Also, the suitable energy supply capacity of NiCoMn-OH electrode was further validated, via utilizing two quasi-solid-state NiCoMn-OH//AC devices to trigger light-emitting diode (LED) bulbs.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/6f7abaf65c308bc9b62acdcad533cd2b20afd99b