Nickel/manganese–cobalt sulfide–nickel sulfide heterostructure nanoarchitectures on reduced graphene hydrogel/nickel foam for high-performance supercapacitors

Ersan Harputlu

doi:10.1016/j.jelechem.2026.120452

Nickel/manganese–cobalt sulfide–nickel sulfide heterostructure nanoarchitectures on reduced graphene hydrogel/nickel foam for high-performance supercapacitors

2026-07-27

0

PRE

AI

E

Ersan Harputlu *

B

Buse Sert

F

Fatih Tezcan

E

Engincan Eroğlu

C

Cihan Geçgel

K

Kasım Ocakoglu

DOI：10.1016/j.jelechem.2026.120452

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Abstract

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• Binder-free hierarchical NiCoS/RGH-NF and MnCoS/RGH-NF core–shell electrodes were successfully fabricated via a 2-MI-assisted MOF-derived strategy. • In situ formed reduced graphene hydrogel (RGH) within nickel foam significantly enhanced the electrochemically active surface area and electrical conductivity. • The NiCoS/RGH-NF electrode delivered an ultrahigh specific capacitance of 4635 F g−1, while MnCoS/RGH-NF achieved 4320 F g−1. • Assembled asymmetric supercapacitors exhibited high energy density (up to 98 Wh kg−1) and excellent cycling stability (>80% retention after 10,000 cycles). • The synergistic integration of RGH and bimetallic sulfide core–shell nanoarchitectures provides a promising strategy for next-generation high-performance supercapacitors.

Keywords:

Transition metal sulfides (TMS)

Heterostructure nanoarchitectures

Reduced graphene hydrogel

Binder-free electrodes

Supercapacitors

Nickel/manganese–cobalt sulfide–nickel sulfide heterostructure nanoarchitectures on reduced graphene hydrogel/nickel foam for high-performance supercapacitors

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