Yuqing Liu

Yuqing Liu
University of Wollongong | UOW ·  Intelligent Polymer Research Institute

Doctor of Philosophy

About

51
Publications
11,301
Reads
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2,420
Citations
Citations since 2017
41 Research Items
2383 Citations
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600
20172018201920202021202220230100200300400500600

Publications

Publications (51)
Article
Full-text available
Robust neuromorphic computing in Big Data Era calls for long‐term stable crossbar‐array memory cell, however, the elemental segregation in the switch unit and memory unit that inevitably occurs upon cycling breaks the compositional and structural stability, making the whole memory cell failured. Searching a novel material without segregation that c...
Article
Thermo-electrochemical cells (TECs) represent an efficient and low-cost heat-harvesting device that can directly convert human body heat energy into electricity. However, the flexible, solid-state gelled electrolytes used in wearable thermocell devices suffer from poor mass transport of electrolyte. Here, a novel porous gel is developed via sodium...
Article
Solar induced thermal energy is a vital heat source supplementing body heat to realize thermo‐to‐electric energy supply for wearable electronics. Thermo‐electrochemical cells (TECs), compared to the widely investigated thermoelectric generators (TEGs), show greater potential in wearable applications due to the higher voltage output from low‐grade h...
Article
Full-text available
Emerging markets for wearable electronics have stimulated a rapidly growing demand for the commercialization of flexible and reliable energy storage and conversion units (including batteries, supercapacitors, and thermoelectrochemical cells). 3D printing, a rapidly growing suite of fabrication technologies, is extensively used in the above‐mentione...
Article
Full-text available
Wearable Electrochemical Energy Devices In article number 2103092, Gordon G. Wallace, Jun Chen, and co-workers summarize the recent developments in additive manufacturing of wearable thermocells, batteries, and supercapacitors. This unique prototype provides an alternative perspective with the potential to promote self-powered wearable systems for...
Article
Full-text available
Wearable thermoelectrochemical cells have attracted increasing interest due to their ability to turn human body heat into electricity. Here, we have fabricated a flexible, cost-effective, and 3D porous all-polymer electrode on an electrical conductive polymer substrate via a simple 3D printing method. Due to the high degree of electrolyte penetrati...
Article
Supercapacitors and secondary batteries are indispensable and widely used energy storage components in modern electrical and electronic facilities/devices. However, they both suffer from different technical weaknesses which need to be thoroughly addressed to satisfy the increasing demand for clean energy technologies. For many years efforts to over...
Article
Surface-enhanced Raman scattering (SERS) has become one of the most sensitive analytical techniques for identifying the chemical components, molecular structures, molecular conformations, and the interactions between molecules. However, great challenges still need to be addressed until it can be widely accepted by the absolute quantification of ana...
Article
Full-text available
Wearable electronics are becoming one of the key technologies in health care applications including health monitoring, data acquisitions, and real-time diagnosis. The commercialization of next-generation devices has been stymied by the lack of ultrathin, flexible, and reliable power sources. Wearable thermo-electrochemical cells (TECs), which can c...
Article
A facile synthesis of Ag nanocrystals encapsulated in nitrogen‐doped carbon fiber (NCF) is proposed, based on the simultaneous reaction between pyrrole and Ag⁺ ions in an aqueous solvent followed by a heat treatment. The as‐prepared Ag/NCF demonstrated superior catalytic behavior toward ORR and OER. Besides improved cycling stability, a much lower...
Article
Full-text available
Thermo-electrochemical cells (known as thermocells) can convert heat energy into electrical power through redox reactions driven by the presence of a temperature gradient. Low-grade heat from the human body can be harvested using thermocells containing a suitable electrolyte, such as the iron(II)/iron(III) chloride redox couple housed in poly (viny...
Article
Thermoelectrochemical cells (thermocells) designed for harvesting human body heat can provide constant power output for wearable electronics, supplementing state‐of‐the‐art flexible power storage and conversion solutions. However, a systematic investigation into the optimization of wearable thermocells is lacking, especially with regard to device d...
Article
Full-text available
A flexible and free-standing 3D reduced graphene oxide@polypyrrole–polyethylene glycol (RGO@PPy–PEG) foam was developed for wearable supercapacitors. The device was fabricated sequentially, beginning with the electrodeposition of PPy in the presence of a PEG–borate on a sacrificial Ni foam template, followed by a subsequent GO wrapping and chemical...
Article
Full-text available
The ultrabroadband spectrum detection from ultraviolet (UV) to long‐wavelength infrared (LWIR) is promising for diversified optoelectronic applications of imaging, sensing, and communication. However, the current LWIR‐detecting devices suffer from low photoresponsivity, high cost, and cryogenic environment. Herein, a high‐performance ultrabroadband...
Article
In article number 1903870, Liangxu Lin, Jun Chen and co‐workers report the research progress, discuss future directions and emerging trends of 2D transition metal dichalcogenides in the electrochemical hydrogen evolution reaction, providing a pathway forward for viable hydrogen evolution.
Article
The hydrogen evolution reaction (HER) is an emerging key technology to provide clean, renewable energy. Current state‐of‐the‐art catalysts still rely on expensive and rare noble metals, however, the relatively cheap and abundant transition metal dichalcogenides (TMDs) have emerged as exceptionally promising alternatives. Early studies in developing...
Article
Full-text available
Ultrathin few‐layer materials have attracted intensive research attention because of their distinctive and unique properties. Few‐layer GeP (FL‐GP) is potentially interesting for application in electronics and optoelectronics because of its appropriate band gap and good stability under ambient conditions. Nevertheless, it is a challenge to achieve...
Article
Voltage-activated adhesion is a relatively new discovery that relies on direct currents for initiation of crosslinking. Previous investigations have found that direct currents are linearly correlated to the migration rates of electrocuring, but this is limited by high voltages exceeding 100 V with instances of incomplete curing of voltage- activate...
Article
There is an urgent need for electrochemical sensor materials that exhibit electrochemically compliant properties while also retaining high durability under physiological conditions. Herein, we demonstrate a novel strip-style electrochemical sensor using reduced graphene oxide (rGO) and poly(ethylene dioxythiophene)/poly(styrene sulfonic acid) (PEDO...
Article
Full-text available
Recently, zinc–air batteries (ZABs) have been receiving attention due to their theoretically high energy density, excellent safety, and the abundance of zinc resources. Typically, the performance of the zinc air batteries is determined by two catalytic reactions on the cathode—the oxygen reduction reaction (ORR) and the oxygen evolution reaction (O...
Article
Plasma processing, as a commercial and large-scale technology, was used to functionalize few-layer graphene (FLG) and multi-walled carbon nanotubes (MWCNT). The successful functionalities of FLG and MWCNT have been confirmed by elemental microanalysis, X-ray photoelectron spectroscopy, acid-base titration and zeta potential measurements. With the a...
Article
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Maintaining structural stability and alleviating the intrinsic poor conductivity of conversion‐type reaction anode materials are of great importance for practical application. Introducing void space and a highly conductive host to accommodate the volume changes and enhance the conductivity would be a smart design to achieve robust construction; eff...
Article
The rising elderly population is driving the need for home health care and remote diagnosis. Emerging E-skins hold great promise to both non-invasively monitor patient vitals and to provide rapid and personised health advice. However, powering these synthetic E-skins in a reliable, convenient, and unattended manner is yet to be achieved. Here we wi...
Chapter
Tremendous progress on the next‐generation wearable electronics has promoted the research on flexible energy storage devices. As one of the promising energy storage devices, supercapacitors (SCs) have attract great interest due to the excellent electrochemical properties (i.e. high energy and power density, fast charge‐discharge and long cycle life...
Article
Full-text available
Ultrasmall gold (Au) nanoparticles with high mass activity have great potential for practical applications in CO2 electroreduction. However, these nanoparticles often suffer from poor product selectivity since their abundant low‐coordinated sites are favorable for H2 evolution. In this work, a catalyst, reduced graphene oxide supported ultrasmall A...
Article
Full-text available
A hybrid of ZnO nanorods grown onto three-dimensional (3D) reduced graphene oxide (RGO)@Ni foam (ZnO/RGO@NF) is synthesized by a facile hydrothermal method. The as-prepared hybrid material is physically characterized by SEM, XRD, Raman, and X-ray photoelectron spectroscopy (XPS). When the as-prepared 3D hybrid is investigated as a photocatalyst, it...
Article
The rapid development in miniaturized personal wearable devices has significantly stimulated the pursuit for ultrathin, flexible, and lightweight energy storage devices. As one of the most promising power supply devices, supercapacitors have attracted great interest owing to their long operating lifetime, high power density, and fast charge–dischar...
Article
Full-text available
Extrusion printing of interdigitated electrodes for flexible microsupercapacitors (fMSCs) offers an attractive route to the fabrication of flexible devices where cost, scalability, and processability of ink formulations are critical. In this work, highly concentrated, viscous, and water‐dispersible inks are developed based on graphene oxide (GO)/po...
Article
Full-text available
A water‐based hybrid Ink comprised of GO/PANi hierarchical structure is facilely prepared with the stabilizer of PEDOT:PSS by Gordon G. Wallace, Jun Chen, and co‐workers in article number 1706592. This kind of formulated Ink is suitable for extrusion printing to directly fabricate both symmetric and asymmetric microsupercapacitors. The devices cann...
Article
The development of wearable devices such as smart watches, intelligent garments, and wearable health‐monitoring devices calls for suitable energy storage devices which have matching mechanical properties and can provide sufficient power for a reasonable duration. Stretchable fiber‐based supercapacitors are emerging as a promising candidates for thi...
Article
Potassium-ion batteries (PIBs) are a promising alternative to lithium-ion batteries because potassium is an abundant natural resource. To date, PIBs are in the early stages of exploration and only a few anode materials have been investigated. This study reports a cobalt sulfide and graphene (CoS@G) composite as anode electrode for PIBs for the firs...
Article
Rechargeable nonaqueous Li-air batteries are attracting much attention due to their far higher theoretical energy density than lithium-ion batteries. However, Li-air batteries suffers from poor round-trip efficiency, low rate capability and poor cycle life. To reduce charge overpotentials by understanding reaction mechanism and to operate in ambien...
Article
A planar three electrodes system (PTES) chip which is consisted of planar Au, Ag/AgCl, and Pt electrodes on ITO (Indium-Tin Oxide) glass is fabricated using state of the art inkjet printing technology to serve as biosensor for electrochemical detection of biomolecules. The electrochemical detection of melamine and dopamine is successfully performed...
Article
The rechargeable Li–CO2 battery is a novel and promising energy storage system with the capability of CO2 capture due to the reversible reaction between lithium ions and carbon dioxide. Carbon materials as the cathode, however, limit both the cycling performance and the energy efficiency of the rechargeable Li–CO2 battery, due to the insulating Li2...
Article
Flexible microsupercapacitors (fMSCs) with interdigitated design are a promising platform as a power source unit for wearable microelectronics. In article number 1600166, Joselito M. Razal, Jun Chen, and co-workers use laser-etching techniques to facilely fabricate the interdigitated patterned electrodes, enabling directly assembly of designed tand...
Article
Flexible microsupercapacitors (fMSCs) with interdigitated electrode design are a promising platform as a power source or energy storage unit for wearable microelectronics. In this work, a facile fabrication of all-solid-state fMSCs is reported through a combination of simple technologies including bar coating and laser etching, to generate the inte...
Article
The prospective utilization of nanoscale superconductors as micro/nanocoils or circuits with superior current density and no electrical resistance loss in next-generation electronics or electromagnetic equipment represents a fascinating opportunity for new microsystem technologies. Here, a family of superconducting liquid metals (Ga?In?Sn alloys) a...
Article
3D hierarchical integrated carbon/red phosphorus/graphene aerogel composite is fabricated via an advanced vapor-redistribution technique. The red P nanoparticles (10–20 nm) in the composite uniformly distribute in the carbon covered graphene aerogel matrix (C@GA), which integrated into a 3D porous structure. The as-prepared C@P/GA electrode deliver...
Article
This work describes the fabrication of hierarchical 3D Nafion enhanced carbon aerogels (NECAGs) for sensing applications via fast freeze dry method. Graphen Oxide, Multiwall Carbon Nanotubes and Nafion were mixed and extruded into liquid nitrogen followed by the removal of ice crystal by freeze dry. The addition of nafion enhanced the mechanical st...
Article
Full-text available
Although great attention has been paid to wearable electronic devices in recent years, flexible lightweight batteries or supercapacitors with high performance are still not readily available due to the limitations of the flexible electrode inventory. In this work, highly flexible, bendable and conductive rGO-PEDOT/PSS films were prepared using a si...
Article
Nerve system diseases like Parkinson's disease, Huntington's disease, Alzheimer's disease, etc. seriously affect thousands of patients' lives every year, making them suffer from pains and inconvenience. Recently, bio-interfaces between neural cells/tissues and polymer based biomaterials attracted worldwide attention due to the ability of polymer ba...
Article
In this paper, noncovalent functionalized graphene nanosheets are prepared through solvent-exfoliation expanded graphite with the aid of supercritical (SC) CO2 and 1-pyrenamine (PA). Then, it is used as supporting materials for platinum to investigate the potential application of the obtained nanocomposite in direct methanol fuel cells (DMFCs). Tra...

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