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2016新能源新材料研究生论坛

作者： Kwadwo Asare Owusu Longbing Qu Jiantao Li Zhaoyang Wang Kangning Zhao Chao Yang Kalele Mulonda Hercule Chao Lin Changwei Shi Qiulong Wei Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122Wuhan430070P.R.China Department of Mechanical and Aerospace Engineering Monash UniversityMelbourneVictoria 3800Australia

Carbon materials are generally preferred as anodes in supercapacitors,however their low capacitance limits the attained energy density of hybrid and asymmetric ***,we develop a novel strategy to synthesize low-crystalline FeOOH nanoparticle anode with high comprehensive performance at a wide potential *** FeOOH nanoparticles present high capacitance at both low and high mass loadings(1066 and 716 F g-1 at 1.6 and 9.1 mg cm-2 respectively),good rate capability(74.6%capacitance retention at 30 A g-1)and excellent cycling stability(91%capacitance retention after 10000 cycles).The excellent performance is attributed to the dominant capacitive charge-storage contribution(~90%at 5 mV s-1).A NiMoO4//FeOOH hybrid supercapacitor shows exceptional stability during float voltage test for 450 hours and high energy density of 104 Wh kg-1 at a power density of 1.27 kW *** packaged device delivers high gravimetric and volumetric energy densities of 33.14 Wh kg-1 and 17.24 Wh L-1,respectively.

关键词： low-crystalline FeOOH hybrid supercapacitor devices pseudocapacitance high energy density capacitive-dominant contribution

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Hierarchy Design in Metal Oxides as Anodes for advanced Lithium-Ion Batteries

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Small Methods 2018年第11期2卷

作者： Jun Jin Liang Wu Shaozhuan Huang Min Yan Hongen Wang Lihua Chen Tawfique Hasan Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Energy Research Institute Nanyang Technological University 639798 Singapore Singapore Institute for Integrative Nanoscience Leibniz Institute for Solid State and Materials Research (IFW Dresden) Postfach 27 01 16 01171 Dresden Germany Cambridge Graphene Centre University of Cambridge 9 JJ Thomson Avenue Cambridge CB3 0FA UK Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles Namur B-5000 Belgium Clare Hall University of Cambridge Herschel Road Cambridge CB3 9AL UK

Hierarchical structures are ubiquitous in both animals and plants. The coordination of the hierarchical structures and functions makes living organisms function efficiently. This explains why hierarchical metal oxide (HMO)-based micro/nanostructures have recently received huge attention as anodes for application in highly efficient lithium-ion batteries (LIBs). Indeed, hierarchy in such micro/nanostructured HMOs offers high specific surface area, stable structure, short path length, and improved higher packing density to improve the reaction kinetics and Li + /e − transport kinetics, resulting in highly enhanced rate capability and cycling stability for LIBs. This report focuses on the hierarchical design from structural, morphological, porous, and component levels to engineer the HMOs as anodes for LIBs. The advantages of micro/nanostructured HMO-based on three reaction mechanisms (intercalation/deintercalation, conversion, and alloying/dealloying), important challenges ahead, and future perspectives on designing advanced electrode materials for next-generation high-performance LIBs are discussed.

关键词： hierarchy lithium ion batteries micro/nanostructured metal oxides reaction kinetics reaction mechanisms

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Effect of Topology Structure on the Output Performance of an Automobile Exhaust Thermoelectric Generator

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IOP Conference Series: materials Science and Engineering 2017年第1期199卷

作者： W Fang S H Quan C J Xie B Ran X L Li L Wang Y T Jiao T W Xu Hubei Key Laboratory of Advanced Technology for Automotive Components Automobile Engineering Institute Wuhan University of Technology 205 Luoshi Road Hongshan District Wuhan 430070 China. School of Automation Wuhan University of Technology Wuhan 430070 China Corresponding author. Tel.: +86 027 87859589 Department of Civil & Environment Engineering University of Wisconsin Madison USA State Key Laboratory of Advanced Technology for Material Synthesis and Processing Wuhan University of Technology Wuhan China Fax: +86 027 87859589.

The majority of the thermal energy released in an automotive internal combustion cycle is exhausted as waste heat through the tail pipe. This paper describes an automobile exhaust thermoelectric generator (AETEG), designed to recycle automobile waste heat. A model of the output characteristics of each thermoelectric device was established by testing their open circuit voltage and internal resistance, and combining the output characteristics. To better describe the relationship, the physical model was transformed into a topological model. The connection matrix was used to describe the relationship between any two thermoelectric devices in the topological structure. Different topological structures produced different power outputs; their output power was maximised by using an iterative algorithm to optimize the series-parallel electrical topology structure. The experimental results have shown that the output power of the optimal topology structure increases by 18.18% and 29.35% versus that of a pure in-series or parallel topology, respectively, and by 10.08% versus a manually defined structure (based on user experience). The thermoelectric conversion device increased energy efficiency by 40% when compared with a traditional car.

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Front Cover: Molecular Engineering of Zinc-Porphyrin Sensitisers for p-Type Dye-Sensitised Solar Cells (ChemPlusChem 7/2018)

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ChemPlusChem 2018年第7期83卷 542-542页

作者： Dr. Jianfeng Lu Dr. Zonghao Liu Narendra Pai Liangcong Jiang Prof. Dr. Udo Bach Dr. Alexandr N. Simonov Prof. Dr. Yi-Bing Cheng Prof. Dr. Leone Spiccia School of Chemistry Monash University Clayton Victoria 3800 Australia School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan 430074 China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia Department of Chemical Engineering Monash University Clayton Victoria 3800 Australia CSIRO Clayton Victoria 3168 Australia ARC Centre of Excellence for Exciton Science Monash University Clayton Victoria 3800 Australia ARC Centre of Excellence for Electromaterials Science Monash University Clayton Victoria 3800 Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Deceased December 2016

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3D Ferroconcrete‐Like Aminated Carbon Nanotubes Network Anchoring Sulfur for advanced Lithium–Sulfur Battery

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advanced Energy materials 2018年第25期8卷

作者： Min Yan Hao Chen Yong Yu Heng Zhao Chao‐Fan Li Zhi‐Yi Hu Pan Wu Lihua Chen Hongen Wang Dongliang Peng Huanxin Gao Tawfique Hasan Yu Li Bao‐Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Department of Materials Science and Engineering College of Materials Xiamen University 422 Siming South Road Xiamen 361005 China Fundamental Research Department SINOPEC Shanghai Research Institute of Petrochemical Technology 165 Pudong Bei Road Shanghai 201208 China Cambridge Graphene Centre University of Cambridge 9 JJ Thomson Avenue Cambridge CB3 0FA UK Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B‐5000 Namur Belgium Clare Hall University of Cambridge Herschel Road Cambridge CB3 9AL UK

To address the serious capacity fading in lithium–sulfur batteries, a 3D ferroconcrete‐like aminated carbon nanotubes network with polyaniline coating as an effective sulfur host to contain polysulfide dissolution is presented here. In this composite, the cross‐linked aminated carbon nanotubes framework provides a fast charge transport pathway and enhancement in the reaction kinetics of the active material to greatly improve the rate capability and sulfur utilization. The ethylenediamine moieties provide strong adhesion of polar discharge products to nonpolar carbon surfaces and thus efficiently prevent polysulfide dissolution to improve the cycle stability, confirmed by density functional theory calculations. The outside polyaniline layers structurally restrain polysulfides to prevent the shuttle effect and active material loss. Benefiting from these advantages, the synthesized composite exhibits a high initial capacity of 1215 mAh g −1 and a capacity of 975 mAh g −1 after 200 cycles at 0.2 C. Even after 200 cycles at 0.5 C, a capacity of 735 mAh g −1 can be maintained, among the best performance reported. The strategy in this work can shed some light on modifying nonpolar carbon surfaces via the amination process to chemically attach sulfur species for high‐performance lithium–sulfur batteries.

关键词： carbon nanotubes density functional theory ethylenediamine modification Li–S battery polyaniline

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Metal oxide-based nanostructure arrays for electrochemical energy storage devices

Metal oxide-based nanostructure arrays for electrochemical e...

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Photonics for Energy, PFE 2015

作者： Liu, Jinping Chemical Engineering and Life Science State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Chemistry Wuhan University of Technology China

High-performance thin-film electrochemical energy storage devices from metal oxidebased nanostructure arrays will be presented, which include flexible/solid-state supercapacitors and Li ion batteries as well as superc... 详细信息

ISBN: (纸本)9781943580019

关键词： Lithium-ion batteries

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Porous TiO 2 urchins for high performance Li-ion battery electrode: facile synthesis, characterization and structural evolution

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Electrochimica Acta 2016年 210卷 206-214页

作者： Yi Cai Hong-En Wang Shao-Zhuan Huang Muk Fung Yuen Heng-Hui Cai Chao Wang Yong Yu Yu Li Wen-Jun Zhang Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road 430070 Wuhan Hubei China Department of Physics and Materials Science and Center Of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong Hong Kong China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur 61 rue de Bruxelles B-5500 Namur Belgium

Porous TiO 2 urchins have been synthesized by a hydrothermal route using TiO 2 /oleylamine as precursors with subsequent ion-exchange and calcination. The resultant material consists of porous spherical cores and nanochains-constructed shells with straight channels. Electrochemical measurements indicate the TiO 2 urchins deliver superior lithium storage capability in terms of high capacity (206.2 mA h g −1 at 0.5 C), superior rate performance (94.4 mA h g −1 at 20 C) and stable cycling stability (94.3% capacity retention over 1000 cycles at 10 C versus the third cycle). Such performance enhancement is mainly due to the increased electrode/electrolyte contact interface, reduced Li + diffusion pathways and improved mass transfer of electrolyte in the unique 3D interconnected hierarchical network. In addition, ex-situ XRD, SEM and TEM analyses further reveal high structure integrity of the porous TiO 2 urchins during the electrochemical lithiation, leading to enhanced lithium storage stability. Moreover, we detected that some anatase nanocrystals evolved into electrochemically inactive Li 1 TiO 2 dots (∼10 nm in size) during long-term electrochemical cycling. Our findings provide more insights for better understanding of the structure evolution and capacity decay mechanism in porous TiO 2 nanostructures.

关键词： TiO 2 porous structure anode materials Li ion battery electrochemistry

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Interaction of boron with graphite: A van der Waals density functional study

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Applied Surface Science 2016年 379卷 402-410页

作者： Juan Liu Chen Wang Tongxiang Liang Wensheng Lai Beijing Key Lab of Fine Ceramics Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China State Key Lab of New Ceramic and Fine Processing Tsinghua University Beijing 100084 China Advanced Material Laboratory School of Materials Science & Engineering Tsinghua University Beijing 100084 China

Boron doping has been widely investigated to improve oxidation resistance of graphite. In this work the interaction of boron with graphite is investigated by a van der Waals density-functional approach (vdW-DF). The traditional density-functional theory (DFT) is well accounted for the binding in boron-substituted graphite. However, to investigate the boron atom on graphite surface and the interstitial impurities require use of a description of graphite interlayer binding. Traditional DFT cannot describe the vdW physics, for instance, GGA calculations show no relevant binding between graphite sheets. LDA shows some binding, but they fail to provide an accurate account of vdW forces. In this paper, we compare the calculation results of graphite lattice constant and cohesive energy by several functionals, it shows that vdW-DF such as two optimized functionals optB88-vdW and optB86b-vdW give much improved results than traditional DFT. The vdW-DF approach is then applied to study the interaction of boron with graphite. Boron adsorption, substitution, and intercalation are discussed in terms of structural parameters and electronic structures. When adsorbing on graphite surface, boron behaves as π electron acceptor. The π electron approaches boron atom because of more electropositive of boron than carbon. For substitution situation, the hole introduced by boron mainly concentrates on boron and the nearest three carbon atoms. The B-doped graphite system with the hole has less ability to offer electrons to oxygen, ultimately resulted in the inhibition of carbon oxidation. For interstitial doping, vdW-DFs show more accurate formation energy than LDA. PBE functional cannot describe the interstitial boron in graphite reasonably because of the ignoring binding of graphite sheets. The investigation of electron structures of boron doped graphite will play an important role in understanding the oxidation mechanism in further study.

关键词： Graphite Boron van der Waals density functional Oxidation

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Microdevices: Carbon-MEMS-Based Alternating Stacked MoS2@rGO-CNT Micro-Supercapacitor with High Capacitance and Energy Density (Small 26/2017)

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Small 2017年第26期13卷

作者： Wei Yang Liang He Xiaocong Tian Mengyu Yan Hui Yuan Xiaobin Liao Jiashen Meng Zhimeng Hao Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 P. R. China Department of Materials Science and NanoEngineering Rice University Houston TX 77005 USA Department of Chemistry University of California Berkeley CA 94720 USA

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Effects of crystallinity and surface modification of calcium phosphate nanoparticles on the loading and release of tetracycline hydro-chloride

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IOP Conference Series: materials Science and Engineering 2017年第1期182卷

作者： Huaizhi Zhang Dong Yan Sriyani Menike Korale Gedara Sajith Sudeepa Fernando Dingiri Marakkalage Jothirathna Gamage Kasun Methlal YingChao Han HongLian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Biomedical Materials and Engineering Research Center of Hubei Province Wuhan University of Technology Wuhan 430070 China Faculty of Applied Sciences Sabaragamuwa University of Sri Lanka Belihuloya 70140 Sri Lanka

The influences of crystallinity and surface modification of calcium phosphate nanoparticles (nCaP) on their drug loading capacity and drug release profile were studied in the present investigation. The CaP nanoparticles with different crystallinity were prepared by precipitation method under different temperatures. CaP nanoparticles with lower crystallinity exhibited higher drug loading capacity. The samples were characterized by XRD, FT-IR, SEM, TEM and BET surface area analyzer respectively. The drug loading capacity of nCaP was evaluated to tetracycline hydro-chloride (TCH). The internalization of TCH loaded nCaP in cancer cell was observed by florescence microscope. nCaP could be stabilized and dispersed in aqueous solution by poly(acrylic acid) surface modification agent, leading to enhanced drug loading capacity. The drug release was conducted in different pH environment and the experimental data proved that nCaP were pH sensitive drug carrier, suggesting that nCaP could achieve the controlled drug release in intracellular acidic environment. Furthermore, nCaP with higher crystallinity showed lower drug release rate than that of lower crystallinity, indicating that the drug release profile could be adjusted by crystallinity of nCaP. nCaP with adjustable drug loading and release properties are promising candidate as drug carrier for disease treatment.

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