Sea urchin-shaped Fe2O3 coupled with 2D MXene nanosheets as negative electrode for high-performance asymmetric supercapacitors

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

“…The electrochemical performances of Fe 2 O 3 and/or NiO‐based asymmetric supercapacitors reported in the literature are shown in Figure 9f for comparison. Clearly, compared with the values of Fe 2 O 3 @N‐doped carbon//NiO@N‐doped carbon (14.1 Wh kg −1 at 1500 W kg −1 ), [ 49 ] reduced graphene oxide/Fe 2 O 3 /carbon nanotubes//reduced graphene oxide/Fe 2 O 3 /carbon nanotubes (35.6 Wh kg −1 at 166.7 W kg −1 ), [ 50 ] Fe 2 O 3 /graphene//Co 3 O 4 /graphene (21.6 Wh kg −1 at 750 W kg −1 ), [ 51 ] Fe 2 O 3 @PPy//MnO 2 (10.6 Wh kg −1 at 16326.4 W kg −1 ), [ 52 ] Fe 2 O 3 /MXene//MnO 2 (32.2 Wh kg −1 at 900.6 W kg −1 ), [ 53 ] MXene/Fe 2 O 3 –C–MoS 2 /MXene//MXene/Fe 2 O 3 –C–MoS 2 /MXene (10.76 Wh kg −1 at 9201 W kg −1 ), [ 54 ] and ZnO@C@NiO//graphene (16 Wh kg −1 at 2704.2 W kg −1 ), [ 55 ] FOCNF‐1//NOCNF‐1 exhibits the higher energy density at the same power density, suggesting its excellent energy storage ability.…”

Advances in pseudocapacitive and battery-like electrode materials for high performance supercapacitors

“…Being pseudocapacitive layered materials, MXenes have demonstrated higher capacitance than carbon-based materials. [710][711][712][713][714][715][716][717][718][719][720] Lukatskaya et al 721 reported that Ti 3 C 2 T x MXene lms possessed a C sp of 210 F g À1 at the scan rate of 10 V s À1 , which was higher than the capacitance achieved with carbonbased SC electrodes. The multi-layered MXene was synthesized by the etching of Ti 3 AlC 2 with HCl/LiF solution.…”

Hierarchical MXene/transition metal oxide heterostructures for rechargeable batteries, capacitors, and capacitive deionization

“…Shi et al fabricated Fe 2 O 3 / MXene heterostructures by the self-assembly of conductive MXene sheets on the surface of urchin-like Fe 2 O 3 . 141 The highly conductive Ti 3 C 2 T x could promote the e − transport in the electrode, while the urchin-like Fe 2 O 3 could promote the rapid penetration of the electrolyte.…”