https://espace.library.uq.edu.au/view/UQ:113b151/UQ113b151_OA.pdf

Boosting the cycling stability of transition metal compounds-based supercapacitors

The development of sodium-ion batteries for large-scale applications requires the synthesis of electrode materials with high capacity, high initial Coulombic efficiency (ICE), high rate performance, long cycle life, and low cost. A rational design of freestanding anode materials is reported for sodium-ion batteries, consisting of molybdenum disulfide (MoS2) nanosheets aligned vertically on carbon paper derived from paper towel. The hierarchical structure enables sufficient electrode/electrolyte interaction and fast electron transportation. Meanwhile, the unique architecture can minimize the excessive interface between carbon and electrolyte, enabling high ICE. The as-prepared MoS2@carbon paper composites as freestanding electrodes for sodium-ion batteries can liberate the traditional electrode manufacturing procedure, thereby reducing the cost of sodium-ion batteries. The freestanding MoS2@carbon paper electrode exhibits a high reversible capacity, high ICE, good cycling performance, and excellent rate capability. By exploiting in situ Raman spectroscopy, the reversibility of the phase transition from 2H-MoS2 to 1T-MoS2 is observed during the sodium-ion intercalation/deintercalation process. This work is expected to inspire the development of advanced electrode materials for high-performance sodium-ion batteries.

MoS2 Nanosheets Vertically Aligned on Carbon Paper: A Freestanding Electrode for Highly Reversible Sodium Ion Batteries

Effect of self-doped heteroatoms on the performance of biomass-derived carbon for supercapacitor applications

Recent progress of biomass-derived carbon materials for supercapacitors

Rational Design of Nanostructured Electrode Materials toward Multifunctional Supercapacitors

https://espace.library.uq.edu.au/view/UQ:bd18f1c/UQbd18f1c_OA.pdf

Synthesis of amorphous nickel–cobalt–manganese hydroxides for supercapacitor-battery hybrid energy storage system

Facile synthesis of N-doped carbon layer encapsulated Fe2N as an efficient catalyst for oxygen reduction reaction

Almond-derived origami-like hierarchically porous and N/O co-functionalized carbon sheet for high-performance supercapacitor

Room-temperature carbon coating on MoS2/Graphene hybrids with carbon dioxide for enhanced sodium storage

Composite microspheres consisting of molybdenum disulfide, amorphous carbon and reduced graphene oxide (named as MoS2-AC-RGO) have been prepared by a hydrothermal approach combined with the spraying-coagulation process and calcinations step. Intercalation compound of cellulose-MoS2 has been obtained after the spraying-coagulation assisted hydrothermal treatment, which then converts to MoS2-AC-RGO after calcinations. Graphene oxide and cellulose have been utilized as the precursors of RGO and AC, respectively. Thiourea is adopted as both the species for cellulose dissolution and sulfur precursor for MoS2. The suspension of GO and sodium molybdate played also the role as coagulation bath. The influence of cellulose on the structure, morphology and electrochemical performance of the resultant MoS2-AC-RGO microspheres have been investigated based on XRD, SEM, TEM, Raman spectra, TGA and N2 adsorption-desorption technique and electrochemical measurements. The composite microspheres show superior electrochemical properties as anode materials for lithium-ion batteries and exhibit a high reversible capacity of 910 mAhg-1 at current density of 200 mA g-1, excellent rate capability and superior cyclic stability with a capacity of 86% after 70 cycles. The roles of the graphene and cellulose in improving the electrochemical properties of the MoS2-AC-RGO composites are discussed based on the morphology, structure, phase and electrochemical performance studies.

Hongbin Feng

Papers

Synthesis of amorphous nickel–cobalt–manganese hydroxides for supercapacitor-battery hybrid energy storage system

Facile synthesis of N-doped carbon layer encapsulated Fe2N as an efficient catalyst for oxygen reduction reaction

Almond-derived origami-like hierarchically porous and N/O co-functionalized carbon sheet for high-performance supercapacitor

Room-temperature carbon coating on MoS2/Graphene hybrids with carbon dioxide for enhanced sodium storage

Spraying Coagulation-Assisted Hydrothermal Synthesis of MoS2/Carbon/Graphene Composite Microspheres for Lithium-Ion Battery Applications