Metal

Battery (electricity)

Quantum mechanics

Adsorption

Composite number

Engineering

Capacitance

Electrochemistry

Metallurgy

Materials science

Power (physics)

Carbon fibers

Chemical engineering

Physical chemistry

Supercapacitor

Gravimetric analysis

Physics

Nanotechnology

Organic chemistry

Metal-organic framework

Composite material

Chemistry

Electrode

Decane

Small

Two identical layered metal-organic frameworks (MOFs) (CoFRS and NiFRS) are constructed by using flexible 1,10-bis(1,2,4-triazol-1-yl)decane as pillars and 1,4-benzenedicarboxylic acid as rigid linkers. The single-crystal structure analysis indicates that the as-synthesized MOFs possess fluctuant 2D networks with large interlayer lattices. Serving as active electrode elements in supercapacitors, both MOFs deliver excellent rate capabilities, high capacities, and longstanding endurances. Moreover, the new intermediates in two electrodes before and after long-lifespan cycling are also examined, which cannot be identified as metal hydroxides in the peer reports. After assembled into battery-supercapacitor (BatCap) hybrid devices, the NiFRS//activated carbon (AC) device displays better electrochemical results in terms of gravimetric capacitance and cycling performance than CoFRS//AC devices, and a higher energy-density value of 28.7 Wh kg-1 compared to other peer references with MOFs-based electrodes. Furthermore, the possible factors to support the distinct performances are discussed and analyzed.

2D Metal–Organic Frameworks (MOFs) for High‐Performance BatCap Hybrid Devices