26th International Conference on Advanced Materials, Nanotechnology and Engineering June 22-23, 2020 Brisbane, Australia

Yanfang Gao has completed her PhD at the age of 30 years from Fukui University and postdoctoral studies from Tsinghua University of Chemistry. She is a professor at the department of Inner Mongolia University of Technology,a tutor of a phD student.She has published more than 20 papers in reputed journals.

Due to its unique characteristics of large specific surface area of transition metal dihalides (TMDs) and clear hollow metal-organic framework (MOF), are widely used in dye sensitized solar cells (DSSCs), oxygen reduction (ORR), oxygen evolution reaction (OER) and other fields.2D transition metal dichalcogenides (TMDs) analogous structure like graphite,it structure is composed of three atomic layers, a W layer sandwiched between two S layers, and the triple layers are stacked by weak van der Waals interaction.[1]Metal-organic framework (MOF) synthesized by the assembly of metal nodes and organic linkers, have emerged as promising materials for diverse applications due to their high porosity and ultrahigh surface area.[2]Calcinate the MOF material at high temperature,get the N-doped hollow carbon nanocages.TMDs combined with MOF templating synthesis of few-layered WS2 Nanoplates confined in Metal-organic framework Nanocaqes for dye-sensitized solar cells as the counter electrode.[3] N/C hollow metal-organic frame structural materials were prepared and used as templates to grow WS2 core-shell and encapsulated them in MOF with a W-N interfacial coupling center.During the pyrolysis process, after carbonization, ZIF-67 becomes Co, N-doped C material, which effectively inhibits the growth of WS2 and forms the multi-functional group WS2@N/C material.Among them, the WS2core- shell structure has better catalytic performance than the layered structure, and the N/C hollow frame structure is conducive to electron transmission and electrolyte entry, so as to fully expose the active sites and improve the catalytic and conductive properties ofthe material through synergistic effects.It is prepared to be core-shell WS2 @N/C nanocage multifunctional electrocatalysts for DSSCs,ORR and OER

Dongni Ma at Mongolia University of Technology for a master's degree in the same year.

Electric double layer capacitors (EDLCs) not only have longer cycle life, but also have better rate performance. Therefore, it is widely used in the fields of uninterruptible power supply and automotive energy regeneration system. Carbon materials, as the most commonly used electrode materials for EDLCs, have attracted many researchers at home and abroad due to their large specific surface area, long service life, good electrical conductivity, abundant pore structure and stable chemical properties. It mainly includes zero-dimensional carbon nanodots (CD), one- dimensional carbon nanotubes (CNT), two-dimensional graphene and 3D hierarchical porous carbon. But lower energy density limited its development. In order to solve these problems, people continue to develop carbon materials with high specific capacitance. 3D hierarchical porous carbon has been continuously developed due to its high specific surface area, abundant porosity and low production cost. The reasonable regulation of the pore size plays a decisive role in the electrochemical performance of the carbon material. Generally, micropores and mesopores can provide large surface area and multiple active sites, while macropores can reduce mass transfer diffusion resistance. And micropores play an important role in improving the specific capacitance of materials, especially the micropores with pore diameter of less than 1 nm is the most effective pore for forming double layer.

Yajing Liu is a PhD student in Inner Mongolia University of Technology

Conductive porous carbons have emerged as the leading hosts for constructing cathodes of lithium-sulfur batteries but are currently challenged by poor surface chemistry and cost-effective synthesis. Herein, a 3D hierarchical macro-mesoporous carbon with in-situ silica anchoring (SMC) was prepared via an economical and high-throughput sol-gel approach. In this strategy, interconnected macropore channels, abundant mesopores and well-distributed silica nanoparticles are synergistically integrated into a conductive framework constructed by carbon nano-particles accumulation, and the tunable content of silica can also be achieved simultaneously. The 3D conductive network and interconnected hierarchical porosities endow the carbon matrix multifaceted structural merits for promoting electrons/ions transfer and homogenizing sulfur dispersion. In addition, the LixSy (S8 and polysulfides) mobilization is dramatically restrained through chemical binding between silica and LixSy, which is confirmed by DFT studies. Benefiting from these unique merits, the batteries delivered a high reversible capacity of 969.7 mAh g-1 and enhanced capacity of 625.5 mAh g-1 with a capacity fading rate of only 0.088% per cycle after 400 cycles at 0.2 C. This strategy may provide a new perspective to surface chemistry modification of carbon-based sulfur hosts material with low cost and simple approach to ultimately advance energy conversion and storage system.

Yanfang Gao has completed her PhD in 2005 from the Japanese national fukui university and postdoctoral studies from Tsinghua University School of chemical sciences in 2006 to 2008. Invited to Japanese national fukui university as senior visiting scholar in 2009. Selected to the second procedure of “321 talents project in the new century” in 2010.As a member of “The Chinese youth delegation” visit to Japan in 2009.Her has published more than 30 papers in reputed journals and has been serving as an editorial board member of repute.

Most reported achievements so far with respect to maximize the energy density values of aqueous asymmetric supercapacitors (ASCs) were obtained through the design and improvement of the positive electrodes. Relative few efforts have been made on the design or the improvement of the ASC negative electrodes. Thus, in this work, Lanthanum (La) is doped into the MoO3 (LaMoO3) nanobelts by a simultaneous one-step solvothermal growth approach and further used as advanced negative electrode material for ASCs application.The as-obtained LaMoO3-4 shows narrower band gap (1.91 eV) than pure MoO3 (2.48 eV) leading to an effective enhancement of electron transport and much better electrochemical performance (as evidenced by experiments and DFT calculations). ASCs with a working voltage of 2 V based on the LaMoO3-4 as negative electrode and VOR as positive electrode exhibit a high energy density of 123 Wh kg-1 at a power density of 1000 W kg-1, as well as outstanding cycling stability with 95.4 % capacitance retention after 6 000 cycles.

Yanfang Gao has completed her PhD at the age of 30 years from Fukui University and postdoctoral stud ies from Tsinghua University of Chemistry. She is a professor at the department of Inner Mongolia University of Technology, a tutor of a phD student. She has published more than 30 papers in reputed journals.

The molten hydroxide direct carbon fuel cell uses moltenhydroxide (NaOH or KOH) as the electrolyte which is containedwithin a metallic container which also acts as a cathode. A carbonrod made from graphite or coal derived carbon is dipped into theelectrolyte and used as both the fuel and anode of the cell.Such a systemwasconsidered to havea number of advantages over the molten carbonate electrolyteDCFC. The advantages of using sodium hydroxide electrolyteinclude high ionic conductivity (especially when associated withwater) [1,2], high reactivity towards carbon [3] anda low melting point [4]. Nanostructured ceria-nickel is an innovativecatalyst concept with aconfiguration that is inverted relative tothat of a conventionalsupported catalyst, which maybe a “sushi”-typestructure. Carbon oxidation is supposedto be efficiently promoted by maximizing the nickel-ceria interfaceto activate oxygen species, increasing the contact between ceriaand carbon to facilitate spillover ofactive oxygen onto the carbon atlarge distances, and covering nickel with ceriaparticles to prevent nickel sintering.The nanocatalyst with special structure was mixed with lignite pyrolysis carbonto enhance the oxidation activity of anodic carbon fuel, and the mixture is acted anodic carbon fuel for molten hydroxide direct carbon fuel cell.