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carbon-based derivatives from metal-organic frameworks as cathode hosts for Li–S batteries

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Journal of Energy Chemistry 2019年第11期28卷 94-113页

作者： Qingping Wu Xuejun Zhou Jun Xu Fahai Cao Chilin Li State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Lithium-sulfur batteries(Li–S batteries) are promising candidates for the next generation high-energy rechargeable Li batteries due to their high theoretical specific capacity(1672 m Ahg-1) and energy density(2500 Wh kg-1). The commercialization of Li–S batteries is impeded by several key challenges at cathode side, e.g. the insulating nature of sulfur and discharged products(Li2S 2 and Li2S), the solubility of long-chain polysulfides and volume variation of sulfur cathode upon cycling. Recently, the carbonbased derivatives from metal-organic frameworks(MOFs) has emerged talent in their utilization as cathode hosts for Li–S batteries. They are not only highly conductive and porous to enable the acceleration of Li +/e-transfer and accommodation of volumetric expansion of sulfur cathode during cycling, but also enriched by controllable chemical active sites to enable the adsorption of polysulfides and promotion of their conversion reaction kinetics. In this review, based on the types of MOFs(e.g. ZIF-8, ZIF-67, Prussian blue, Al-MOF, MOF-5, Cu-MOF, Ni-MOF), the synthetic methods, formation process and morphology, structural superiority of MOFs-derived carbon frameworks along with their electrochemical performance as cathode host in Li–S batteries are summarized and discussed.

关键词： Lithium-sulfur batteries carbon-based derivatives Metal-organic frame works Cathode host

Highly stable carbon-based perovskite solar cell with a record efficiency of over 18% via hole transport engineering

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Journal of Materials Science & Technology 2019年第6期35卷 987-993页

作者： Qian-Qian Chu Bin Ding Jun Peng Heping Shen Xiaolei Li Yan Liu Cheng-Xin Li Chang-Jiu Li Guan-Jun Yang Thomas P. White Kylie R. Catchpole State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University 28 West Xianning RoadXi'an 710049 China Research School of Engineering The Australian National University Canberra ACT 2601 Australia

carbon-based perovskite solar cells show great potential owing to their low-cost production and superior stability in air, compared to their counterparts using metal contacts. The photovoltaic performance of carbon-based PSCs, however, has been progressing slowly in spite of an impressive efficiency when they were first reported. One of the major obstacles is that the hole transport materials developed for stateof-the-art Au-based PSCs are not suitable for carbon-based PSCs. Here, we develop a low-temperature,solution-processed Poly(3-hexylthiophene-2,5-diyl)(P3 HT)/graphene composite hole transport layer(HTL), that is compatible with paintable carbon-electrodes to produce state-of-the-art perovskite devices. Space-charge-limited-current measurements reveal that the as-prepared P3 HT/graphene composite exhibits outstanding charge mobility and thermal tolerance, with hole mobility increasing from8.3 × 10^-3 cm^2 V-1 s-1(as-deposited) to 1.2 × 10^-2 cm2 V^-1 s^-1(after annealing at 100°C)-two orders of magnitude larger than pure P3 HT. The improved charge transport and extraction provided by the composite HTL provides a significant efficiency improvement compared to cells with a pure P3 HT HTL. As a result, we report carbon-based solar cells with a record efficiency of 17.8%(certified by Newport);and the first perovskite cells to be certified under the stabilized testing protocol. The outstanding device stability is demonstrated by only 3% drop after storage in ambient conditions(humidity: ca. 50%) for 1680 h(nonencapsulated), and retention of ca. 89% of their original output under continuous 1-Sun illumination at room-temperature for 600 h(encapsulated) in a nitrogen environment.

关键词： Planar carbon-based perovskite solar cells Hole transport engineering Recorded efficiency Excellent moisture and light stability

Preheating Combustion Characteristics of Ultra-Low Volatile carbon-based Fuel

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Journal of Thermal Science 2019年第4期28卷 772-779页

作者： ZHU Shujun LYU Qinggang ZHU Jianguo LI Jiarong MAN Chengbo LIU Wen Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Pulverized coal combustion technology with preheating solid fuel in a circulating fluidized bed was used for the combustion test of ultra-low volatile carbon-based *** paper first validated the feasibility and advantages of applying the combustion technology to this kind of *** carbon-based fuel could achieve a stable preheating process in this test *** the preheating,the apparent sensible heat of the fuel was significantly *** provided a necessary condition for the stable ignition and efficient combustion of the carbon-based fuel in the post-combustion *** relative proportions of CO,H2,and CH4 in preheated coal gas were very low,and the effect of high-temperature coal gas at the entrance of the post-combustion chamber was greatly impaired,indicating that the combustion process in post-combustion chamber was mainly the combustion of preheated *** the same time,the strong reducing atmosphere in the circulating fluidized bed also facilitated the reduction of fuel-nitrogen into N2,which resulted in low NOx *** this basis,with the combination of preheating combustion technology and air-staging combustion technology,the NOx emissions had drastically decreased when the burnout air distribution position moved down or varied from a single-layer distribution to a multi-layer distribution *** lowest original NOx emissions were 90.6 mg/m3(at 6%O2),and the combustion efficiency exceeded 97%,which ultimately achieved efficient and clean combustion of ultra-low volatile carbon-based fuel.

关键词： preheating combustion circulating fluidized bed ultra-low volatile carbon-based fuel air-staging Nox emissions

Metal-free, carbon-based catalysts for oxygen reduction reactions

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Frontiers of Chemical Science and Engineering 2015年第3期9卷 280-294页

作者： Zhiyi Wu Zafar Iqbal Xianqin Wang Department of Materials Science and Engineering New Jersey Institute of Technology Newark NJ 07102 USA Department of Chemistry and Environmental Science New Jersey Institute of Technology Newark NJ 07102 USA Department of Chemical Biological and Pharmaceutical Engineering New Jersey Institute of Technology Newark NJ 07102 USA

Developing metal-free, carbon-based catalysts to replace platinum-based catalysts for oxygen reduction reactions （ORRs） is an emerging area of research. In recent years, different carbon structures including carbon doped with IIIA-VIIA heteroatoms （C-M site-based, where M represents the doped heteroatom） and polynitrogen （PN） compounds encapsulated in carbon nanotubes （CNTs）（N N site-based） have been synthesized. Compared to metallic catalysts, these materials are highly active, stable, inexpensive, and environmentally friendly. This review discusses the development of these materials, their ORR performances and the mechanisms for how the incorpora- tion of heteroatoms enhances the ORR activity. Strategies for tailoring the structures of the carbon substrates to improve ORR performance are also discussed. Future studies in this area will need to include optimizing synthetic strategies to control the type, amount and distribution of the incorporated heteroatoms, as well as better understanding the ORR mechanisms in these catalysts.

关键词： oxygen reduction reaction electrocatalysis metal-flee carbon-based polynitrogen

Preparation, Characterization and Catalytic Activity of Alkyl Benzene Sulfonic Acid carbon-based Acid Catalyst

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Journal of Surface Engineered Materials and Advanced Technology 2015年第2期5卷 93-101页

作者： Huoxin Luan Yunqiang Wu Wenxiang Wu Quansheng Chen Hailing Zhang Kang Liu Guangmiao Qu Wei Ding Xinjiang Oilfield Company Xinjiang China Northeast Petroleum University Daqing China

based on starch and series of alkyl benzene sulfonic acid as the materials, a novel carbon-based solid acid catalyst is synthesized using hydrothermal method. This catalyst exhibits much higher catalytic activity in the reaction of esterification of Mono-fatty alcohol polyoxyethylene maleate esters with 1,4-butanediol. The structure of carbon-based solid acid catalyst was charactered by IR and XRD, characterizations showed that this catalyst exhibited high –SO3H loading. Reusability of the carbon-based solid acid catalyst for esterification showed that after recycling five times the activity remained unchanged.

关键词： Alkyl Benzene Sulfonic Acid carbon-based Solid Acid Catalyst Esterification

In-Situ Growth of Perovskite Stacking Layer for High-Efficiency carbon-based Hole Conductor Free Perovskite Solar Cells

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In-Situ Growth of Perovskite Stacking Layer for High-Efficie...

High specific surface area porous graphene grids carbon as anode materials for sodium ion batteries

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Qisen Zhou Yunfei Wang Jianhua Liu Xiaoliang Zhang School of Materials Science and Engineering Beihang University

The interfacial properties between the perovskite layer and carbon electrode are critical for the photovoltaic performance of the carbon electrode-based perovskite solar cells(PSCs). Herein, a methylammonium lead mixed halide(MAPbIBr) perovskite layer in-situ grows on the top of methylammonium lead iodide(MAPbI) perovskite layer forming MAPbI/MAPbIBr perovskite stacking structure(PSS) to improve the interfacial properties at the perovskite/carbon electrode interface. The charge carrier dynamics in both perovskite and PSC device induced by the MAPbIBr perovskite stacking layer are studied using extensive characterizations. The charge interfacial recombination at the perovskite/carbon electrode interface is significantly diminished using the PSS within PSC, resulting in largely improved charge extraction and therefore high photovoltaic performance. The PSS-based PSC shows a power conversion efficiency up to 16.2%(increased by 43% compared with that of the conventional MAPbI-based PSC), which is among the highest efficiency of the carbon electrode-based hole conductor free PSCs. Meanwhile, the PSS-based PSC exhibits good stability under both continuous illumination and storage under dark condition. This work may provide a new avenue to fine control the interfacial properties of carbon electrode-based PSC for further improving photovoltaic performance.

关键词： Perovskite Stacking Layer Hole Conductor Free carbon-based Perovskite Solar Cells

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Journal of Energy Chemistry 2019年第4期28卷 159-166页

作者： Hao Zhang Huinan Guo Aiyang Li Xiaoya Chang Song Liu Dun Liu Yijing Wang Fang Zhang Huatang Yuan College of Chemistry Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Although great accomplishments of functional material synthesis have been achieved in sodium ion batteries(SIBs)recently,there are still numerous challenges and problems in preparing carbon-based materials with porous architectures and enough lattice distance for Na^+*** we report a templated strategy to synthesize 3D porous graphene girds(PGGs)consisting of several stacking graphene structure with ultrahigh surface area and hierarchical connected structure by employing Ag nanoparticles(NPs).The Ag NPs will regenerate for decreasing the experimental cost,also in line with principles of green chemistry and environmentally friendly *** PGGs obtain advanced specific capacity of160 m A h g^(-1)at current density of 50 m A h g^(-1).Moreover,112 mA h g^(-1)capacity can be gained at 1 A h g^(-1)during 1000 *** to their porous architecture,ultrahigh surface area and low amorphous graphited structure,PGGs electrode showed the excellent electrochemical performance in high rate capability.

关键词： carbon-based materials Porous structure Ultrahigh surface area Ag nanoparticle Sodium ion battery

Solvent-free nanocasting toward universal synthesis of ordered mesoporous transition metal sulfide@N-doped carbon composites for electrochemical applications

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Nano Research 2019年第9期12卷 2250-2258页

作者： Jiahui Zhu Zhi Chen Lin Jia Yuqi Lu Xiangru Wei Xiaoning Wang Winston Duo Wu Na Han Yanguang Li Zhangxiong Wu Suzhou Key Laboratory of Green Chemical Engineering School of Chemical and Environmental EngineeringCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Transition metal sulfides (TMSs) have a wide range of applications owing to their intriguing *** efforts have been devoted to nanostructuring TMSs to enhance their properties and performance,still there is a high need in general synthesis of TMS ***,for the first time,a simple solvent free reactive nanocasting approach that integrates solid precursor loading,in-situ sulfuration and carbonization into a single heating step is developed for the universal synthesis of ordered mesoporous TMS@N-doped carbon composites (denoted as OM-TMS@NCs) with methionine (Met) and metal chlorides as the precursors and the mesoporous silica (SBA-15) as the hard template.A series of OM-TMS@NCs with a hexagonal mesostructure,ultra-high surface areas (430-754 m2·g-1),large pore volumes (0.85-1.32 cm3·g-1),and unique TMS stoichiometries,including MoS2,Fe7S8,Co9S8,NiS,Cu7S4 and ZnS,are *** distinct structure configurations,namely,highly dispersed ultrathin TMS nanosheets within NCs and TMS@NC co-nanowire arrays,can be obtained depending on different *** structure evolution of the OM-TMS@NCs over the solvent-free nanocasting process is studied in detail for a deep understanding of the *** demonstrations,these materials are promising for electrocatalytic hydrogen evolution reaction and lithium ion storage with high performances.

关键词： transition metal sulfides mesoporous materials solvent-free nanocasting in-situ sulfuration carbon-based composites electrochemical applicati ons

carbon nanotube transistors with graphene oxide films as gate dielectrics

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Science China(Physics,Mechanics & Astronomy) 2010年第5期53卷 828-833页

作者： FU WangYang,LIU Lei,WANG WenLong,WU MuHong,XU Zhi,BAI XueDong & WANG EnGe Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing China

carbon nanomaterials,including the one-dimensional(1-D) carbon nanotube(CNT) and two-dimensional(2-D) graphene,are heralded as ideal candidates for next generation *** essential component for the development of advanced nanoelectronics devices is processing-compatible ***,in analogy to the widespread use of silicon dioxide(SiO2) in silicon microelectronic industry,we report the proof-of-principle use of graphite oxide(GO) as a gate dielectrics for CNT field-effect transistor(FET) via a fast and simple solution-based processing in the ambient *** exceptional transistor characteristics,including low operation voltage(2 V),high carrier mobility(950 cm2/V-1 s-1),and the negligible gate hysteresis,suggest a potential route to the future all-carbon nanoelectronics.

关键词： carbon-based nanoelectronics graphene oxide gate dielectrics