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Highly stretchable double-network gel electrolytes integrated with textile electrodes for wearable thermo-electrochemical cells

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SusMat 2024年第4期4卷 77-89页

作者： Yuetong Zhou Ding Zhang Shuai Zhang Yuqing Liu Rujun Ma Gordon Wallace Jun Chen School of Materials science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjinChina Intelligent Polymer Research Institute ARC Centre of Excellence for Electromaterials ScienceAustralian Institute for Innovative MaterialsUniversity of WollongongNorth WollongongNew South WalesAustralia State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengduChina

Thermo-electrochemical cells(TECs)provide a new potential for self-powered devices by converting heat energy into ***,challenges still remain in the fabrication of flexible and tough gel electrolytes and their compat-ibility with redox actives;otherwise,contact problems exist between electrolytes and electrodes during stretching or ***,a novel robust and neutral hydrogel with outstanding stretchability was developed via double-network of crosslinked carboxymethyl chitosan and polyacrylamide,which accommodated both n-type(Fe^(2+)/Fe^(3+))and p-type([Fe(CN)_(6)]^(3-)/[Fe(CN)_(6)]^(4-))redox couples and maintained stretchability(>300%)and recoverability(95%compression).Moreover,poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)textile elec-trodes with porous structure are integrated into gel electrolytes that avoid contact issues and effectively boost the P_(max) of n-and p-type thermocell by 76%and 26%,*** optimized thermocell exhibits a quick current density response and is continually fully operational under deformations,which satisfies the working conditions of wearable *** thermocells(four pairs)are effectively connected in alternating single n-and p-type cells in series and out-putted nearly 74.3 mV atΔT=10℃.The wearable device is manufactured into a soft-pack thermocells to successfully harvest human body heat and illuminate an LED,demonstrating the potential of the actual application of the thermocell devices.

关键词： human body heat porous textile electrodes stretchable double-network hydrogel electrolytes thermo-electrochemical cells wearable devices

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3D-printed hierarchical porous and multidimensional conductive network based on conducting polymer/graphene oxide

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Journal of Materiomics 2024年第1期10卷 234-244页

作者： Cankun Gao Xiaoling Cui Caiyun Wang Mengya Wang Shumin Wu Yin Quan Peng Wang Dongni Zhao Shiyou Li School of Petrochemical Technology Lanzhou University of TechnologyLanzhou730050China Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province Lanzhou730050China Gansu Engineering Laboratory of Cathode Material for Lithium-ion Battery Baiyin730900China arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteUniversity of WollongongAIIM FacilityInnovation CampusNorth WollongongNSW2500Australia

Designing ultrathick and hierarchical electrodes is effective to deal with the challenge of high areal capacity and high power density for lithium-ion batteries(LIBs)***,a thick electrode with hierarchical porous and multidimensional conductive network is fabricated by 3D printing tech-nology,in which both the conducting polymer of poly(3,4-ethylene dioxythiophene):polystyrene sul-fonate(PEDOT:PSS)and graphene oxide(GO)play the dual roles as binders and conductive *** a consequence,the 3D-printed thick electrode(~900 mm)with a mass loading of~47 mg/cm^(2) exhibits a good rate capability of 122 mA·h/g at 2 C,a high areal capacity of up to 5.8 mA·h/cm^(2),and stable cycling performance of~95%capacity retention after 100 ***,the C-O-S bond is further confirmed by the spectral analysis and the DFT calculation,which not only hinders the stack of nanosheets but enhances the mechanical stability and electronic conductivity of electrodes.A stable covalent multidi-mensional conductive network constructed by 3D-printing technology provides a new design strategy to improve the performance of LIBs.

关键词： 3D printing PEDOT:PSS Thick electrodes Areal capacity Lithium-ion batteries

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Alkali Metal Ion Substituted Carboxymethyl Cellulose as Anode Polymeric Binders for Rapidly Chargeable Lithium-Ion Batteries

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Energy & Environmental Materials 2024年第1期7卷 77-82页

作者： Seoungwoo Byun Zhu Liu Dong Ok Shin Kyuman Kim Jaecheol Choi Youngjoon Roh Dahee Jin Seungwon Jung Kyung-Geun Kim Young-Gi Lee Stefan Ringe Yong Min Lee Department of Energy science and Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Korea ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China Intelligent Sensors Research Section Electronics and Telecommunications Research Institute(ETRI)Daejeon 34129Korea Department of Advanced Device Technology University of Science and Technology(UST)Daejeon 34113Korea Intelligent Polymer Research Institute and arc centre of Excellence for electromaterials science University of WollongongWollongong NSW 2522Australia Department of Chemistry Korea UniversitySeoul 02841Korea Energy science and Engineering Research Center Daegu Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Korea

The increasing demand for short charging time on electric vehicles has motivated realization of fast chargeable lithium-ion batteries(LIBs).However,shortening the charging time of LIBs is limited by Li^(+)intercalation process consisting of liquid-phase diffusion,de-solvation,SEI crossing,and solid-phase ***,we propose a new strategy to accelerate the de-solvation step through a control of interaction between polymeric binder and solvent-Li^(+)*** this purpose,three alkali metal ions(Li^(+),Na^(+),and K^(+))substituted carboxymethyl cellulose(Li-,Na-,and K-CMC)are prepared to examine the effects of metal ions on their *** lowest activation energy of de-solvation and the highest chemical diffusion coefficient were observed for ***,Li-CMC cell with a capacity of 3 mAh cm^(-2)could be charged to>95%in 10 min,while a value above>85%was observed after 150 ***,the presented approach holds great promise for the realization of fast charging.

关键词： de-solvation digital twins fast charging graphite anodes polymeric binders

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Ionic liquid/tetraglyme hybrid Mg[TFSI]_2 electrolytes for rechargeable Mg batteries

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Green Energy & Environment 2019年第2期4卷 146-153页

作者： Zheng Ma Maria Forsyth Douglas R.MacFarlane Mega Kar School of Chemistry Faculty of Science Monash University arc centre of Excellence for electromaterials science IFM – Institute for Frontier Materials Deakin University

The electrochemical reversibility of Mg in hybrid electrolytes based on mixtures of ionic liquid and glyme based organic solvents was investigated for applications in rechargeable magnesium batteries(RMBs). The electrolytes demonstrate reversible reduction and oxidation of Mg only after being pre-treated with the dehydrating agent, magnesium borohydride, Mg[BH_4]_2, highlighting the importance of removing water in Mg based electrolytes. The addition magnesium di[bis(trifluoromethanesulfonyl)imide](Mg[TFSI]_2)(0.3 M) to N-butyl-n-methyl-pyrrolidinium bis(trifluoromethanesulfonyl)imide [C4 mpyr][TFSI]/tetraglyme at a mole ratio of 1:2 showed stable CV cycling over almost 300 cycles while scanning electron microscopy(SEM) and X-ray diffraction(XRD) confirmed Mg deposition, showing non-dendritic morphology and a well-aligned growth. Further thermogravimetric analysis(TGA) demonstrated a mass retention of 79% at 250℃ for this electrolyte suggesting that the presence of the ionic liquid increases thermal stability substantially making these hybrid electrolytes compatible for RMBs.

关键词： Mg[TFSI]2 Ionic liquids Tetraglyme Rechargeable Mg battery Mg[BH4]2 dehydrate reagent

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Recent Advances in Transition Metal-Based Catalysts for Electrocatalytic Nitrate Reduction Reaction

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Journal of Donghua University(English Edition) 2024年第4期41卷 333-348页

作者： LUO Hongxia CHEN Jun YANG Jianping State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteAustralian Institute of Innovative MaterialsUniversity of WollongongNew South WalesWollongong 2522Australia

The accumulation of excessive nitrate in the atmosphere not only jeopardizes human health but also disrupts the balance of the nitrogen cycle in the *** various nitrate removal technologies,electrocatalytic nitrate reduction reaction(eNO_(3)RR)has been widely studied for its advantages of being eco-friendly,easy to operate,and controllable under environmental conditions with renewable energy as the driving *** metal-based catalysts(TMCs)have been widely used in electrocatalysis due to their abundant reserves,low costs,easy-to-regulate electronic structure and considerable electrochemical *** addition,TMCs have been extensively studied in terms of the kinetics of the nitrate reduction reaction,the moderate adsorption energy of nitrogen-containing species and the active hydrogen supply *** on this,this review firstly discusses the mechanism as well as analyzes the two main reduction products(N_(2)and NH_(3))of eNO_(3)RR,and reveals the basic guidelines for the design of efficient nitrate catalysts from the perspective of the reaction ***,this review mainly focuses on the recent advances in the direction of eNO_(3RR)with four types of TMCs,Fe,Co,Ni and Cu,and unveils the interfacial modulation strategies of Fe,Co,Ni and Cu catalysts for the activity,reaction pathway and ***,reasonable suggestions and opportunities are proposed for the challenges and future development of eNO_(3)*** review provides far-reaching implications for exploring cost-effective TMCs to replace high-cost noble metal catalysts(NMCs)for eNO_(3)RR.

关键词： electrocatalysis nitrate reduction reaction transition metal-based catalyst(TMC) reaction mechanism nitrogen cycle

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Transition-metal-doped Fe2O3 nanoparticles for oxygen evolution reaction

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Progress in Natural science:Materials International 2018年第4期28卷 430-436页

作者： Yichun Yin Xiwang Zhang Chenghua Sun arc centre of Excellence for electromaterials science School of Chemistry Monash University Department of Chemical Engineering Monash University Faculty of science Engineering & Technology Swinburne University of Technology

Hematite(α-Fe2O3)has been extensively studied as a promising photocatalyst,with the capacity to split water under visible *** tune its electronic structure and improve the performance for oxygen evolution reaction(OER),high-quality single crystals ofα-Fe2O3nanoparticles were synthesized and doped by various transition metals(M=V,Cr,Mn,Zn,Co,Ni,Cu,Nb,Mo,Ti)by a molten-salt flux ***,electronic and catalytic properties of transition-metal-dopedα-Fe2O3(TM-dopedα-Fe2O3)have been systematically *** has been identified as the best dopant forα-Fe2O3,reducing the OER overpotential by 0.16 V with respect to the undoped.

关键词： Hematite Metal doping Water splitting Oxygen evolution reaction

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Scale up of reactors for carbon dioxide reduction

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Frontiers of Chemical science and Engineering 2023年第1期17卷 116-122页

作者： Andrew Nattestad Klaudia Wagner Gordon G.Wallace Intelligent Polymer Research Institute and arc centre of Excellence for electromaterials science University of WollongongWollongong NSW 2522Australia School of Chemistry Monash UniversityClayton VIC 3800Australia

In recent times there has been a great deal of interest in the conversion of carbon dioxide into more useful chemical *** the other hand,the translation of these developments in electrochemical reduction of carbon dioxide from the laboratory bench to practical scale remains an underexplored *** we examine some of the major challenges,demonstrating some promising strategies towards such scale-up,including increased electrode area and stacking of electrode pairs in different *** observed that increasing the electrode area from 1 to 10 cm^(2) led to only a 4%drop in current density,with similarly small penalties realised when stacking sub-cells together.

关键词： CO_(2)reduction electrochemical cell electrosynthesis upscaling

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Mesoporous Carbon-Tin Nanocomposites as Anode Materials for Li-ion Battery

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Journal of Materials science & Technology 2008年第4期24卷 657-660页

作者： Z. W.Zhao Z.P.Guo P. Yao H.K.Liu Institute for Superconducting and Electronic Materials University of Wollongong NSW 2522 Australia arc centre of Excellence for electromaterials science University of Wollongong NSW 2522 Australia centre for Analysis and Measurement Tianjin University Tianjin 300072 China

A new mesoporous carbon-tin （MC-Sn） nanocomposite has been successfully prepared via a two-step method. From the transmission electron microscopy （TEM） observations, the tin nanoparticles were decorated on the as-prepared mesoporous carbons. The mesoprous structure of the carbon can effectively buffer the volume changes during the Li-Sn alloying and de-alloying cycles. The as-prepared MC/Sn nanocomposite electrodes exhibited extremely good cycling stability, with the specific capacity of Sn in the composite electrode calculated to be 959.7 mAh-g-1, which amounts to an impressive 90.9% of the theoretical value （990 mAh-g-1）. The reversible capacity after 200 cycles is 96.1% of the first cycle reversible capacity, i.e., the capacity fade rate is only 0.0195% per cycle, which is even better than that of commercial graphite-based anodes.

关键词： Mesoporous Carbon Tin Nanocomposites Lithium ion battery

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Recent progress in 2D materials for flexible supercapacitors

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Journal of Energy Chemistry 2018年第1期27卷 57-72页

作者： Yan Han Yu Ge Yunfeng Chao Caiyun Wang Gordon G.Wallace Energy&Materials Engineering centre College of Physics and Materials Science.Tianjin Normal UniversityTianjin 300387.China arc centre of Excellence for electromaterials science Intelligent Polymer Research InstituteUniversity of Wollongong.NSW 2500.Australia

High performance supercapacitors coupled with mechanical flexibility are needed to drive flexible and wearable electronics that have anesthetic appeal and multi-functionality. Two dimensional（2D） materials have attracted attention owing to their unique physicochemical and electrochemical properties, in addition to their ability to form hetero-structures with other nanomaterials further improving mechanical and electrochemical properties. After a brief introduction of supercapacitors and 2D materials, recent progress on flexible supercapacitors using 2D materials is reviewed. Here we provide insights into the structure–property relationships of flexible electrodes, in particular free-standing films. We also present our perspectives on the development of flexible supercapacitors.

关键词： 2D materials Flexible supercapacitors Graphene Molybdenum disulfide MXenes

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Ultra-small Cu nanoparticles embedded in N-doped carbon arrays for electrocatalytic CO2 reduction reaction in dimethylformamide

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Nano Research 2018年第7期11卷 3678-3690页

作者： Xiaolong Zhang Ying Zhang Fengwang Li Christopher D. Easton Alan M. Bond Jie Zhang School of Chemistry Monash University Clayton 3800 VIC Australia arc centre of Excellence for electromaterials science Monash University Clayton 3800 VIC Australia CSIRO Manufacturing BayviewAvenue Clayton 3168 VIC Australia

The development of heterogeneous catalysts with a well-defined micro structure to promote their activity and stability for electrocatalyfic CO2 reduction has been shown to be a promising strategy. In this work, Cu nanoparticles （- 4 nm in diameter） embedded in N-doped carbon （Cu@NC） arrays were fabricated by thermal decomposition of copper tetracyanoquinodimethane （CuTCNQ） under N2. Compared to polycrystalline copper electrodes, the Cu@NC arrays provide a significantly improved number of catalytically active sites. This resulted in a 0.7 V positive shift in onset potential, producing a catalytic current density an order magnitude larger at a potential of -2.7 V vs. Fc/Fc＋（Fc = ferrocene） in dimethylformamide （DMF）. By controlling the water content in the DMF solvent, the CO2 reduction product distribution can be tuned. Under optimal conditions （0.5 vol.% water）, 64% HCOO^-, 20% CO, and 13% H2 were obtained. The Cu@NC arrays exhibited excellent catalytic stability with only a 0.5% decrease in the steady-state catalytic current during 6 h of electrolysis. The three-dimensional （3D） array structure of the Cu@NC was demonstrated to be effective for improving the catalytic activity of copper based catalysts while maintaining long-term catalytic stability.

关键词： copper tetracyanoquinodimethane (CuTCNQ) copper carbon arrays CO2 reduction electrocatalysis

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