Core–shell structural PANI-derived carbon@Co–Ni LDH electrode for high-performance asymmetric supercapacitors

Abstract

Carbon/metal nanocomposites have been considered promising electrode materials for application in supercapacitors owing to their combination of good electrical conductivity, excellent cycle stabilities of the electronic double layer capacitor (EDLC) and high specific capacitance of the pseudocapacitor.

Hierarchical PANI/NiCo-LDH Core-Shell Composite Networks on Carbon Cloth for High Performance Asymmetric Supercapacitor

“…Meanwhile, all the nearly symmetric GCD curves reveal that the redox reactions between the PANI/LDH-200 electrode and KOH eletrolyte are highly reversible. Impressively, the PANI/LDH-200 delivers the largest capacitances of 1845 F g −1 at a current density of 0.5 A g −1 , which is superior to those of other reported LDH-based composite electrodes [17,39,40,41,42,43] as shown in Table S2.…”

Electrostatic self-assembly of MXene and edge-rich CoAl layered double hydroxide on molecular-scale with superhigh volumetric performances

“…Specific capacity was evaluated according to the GCD curves. Compared with pure CoAl-LDH, ML-90 and ML-70 electrodes, the ML-80 electrode always exhibits higher gravimetric specific capacity at different measured current https://engine.scichina.com/doi/10.1016/j.jechem.2019.10.023 [20] , Ti 3 C 2 /NiCoAl-LDH [30] , CoAl-LDH/PG [31] , CoAl-LDH/rGO/MnO 2 [32] , CoAl-LDH@CF [33] , G-LDH [34] , NiCo-CH [35] , rGO/CoAl-LDH [36] , CoAl-LDH/GO [16] , graphene/NiAl-LDH [37] , CoAl-LDH/GF [38] , PANC@CoNi-LDH [50] , Co(OH) 2 /Al(OH) 3 /carbon fiber paper (CFP) [51] , CoAl-LDH/fluorinated graphene (FNG) [17] , CoAl-LDH [55] . (e) Comparison of the volumetric and gravimetric capacity of ML-80 with previously reported electrodes, such as MXene clay [12] , TCBOC [39] , WO 3-x /Carbon [40] , MnO 2 /graphene [41] , NiCo 2 O 4 /NSCS [42] , GF/NiCo 2 S 4 [43] , Ni(OH) 2 /graphene [44] , 1T-MoS 2 film [45] , MXene/CNT [46] , Ti 3 C 2 T x paper [18] , modified nanoporous MXene [19] , graphene foam MnO 2 /graphene [56] , p-phenylenediamine/graphene [57] .…”

“…The maximum energy density of our fabricated ML-80//MG-5 ASC device is strongly comparable with those of the other previously reported MXene or LDH based ASC device in literature ( Fig. 5 d), such as NiCo-LDH/rGO//AC (58.6 Wh kg −1 ) [48] , Ti 3 C 2 /NiCoAl-LDH//AC (45.8 Wh kg −1 ) [30] , CoAl-LDH/Ni(OH) 2 //CNTs (16.7 Wh kg −1 ) [49] , polyaniline derived carbon nanowire (PANC)@CoNi-LDH//PANC (38.7 Wh kg −1 ) [50] , Co(OH) 2 /Al(OH) 3 //AC (30.4 Wh kg −1 ) [51] . More importantly, benefitting from the high density of both ML-80 and MG-5 electrode materials, volumetric energy density of the assembled ML-80//MG-5 ASC device could achieve 85.4 Wh L −1 at a power density of 2739.6 W L −1 ( Fig.…”

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

“…Considerable efforts have been made to improve electrochemical performance of complex hydroxides by the development of composites, containing other capacitive materials, such as oxides, graphene, and activated carbon. [ 190–194 ] The development of core–shell Ni‐Al layered double hydroxide/CNT composites [ 195 ] allowed the fabrication of electrodes with active mass of 50 mg cm −2 . CNT served as a conductive backbone for the layered Ni‐Al LDH nanosheets.…”