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A novel thermomechanically stable LaF_3–CsH_5(PO_4)_2 composite electrolyte with high proton conductivity at elevated temperatures over 150 °C

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Journal of Energy Chemistry 2019年第3期28卷 114-120页

作者： Jie Xiong Yunjie Huang Jing Li Liying Ma Guoxiao Xu Zhao Liu Weiwei Cai hansong cheng Sustainable Energy Laboratory Faculty of Materials Science and Chemistry China University of Geosciences (Wuhan) College of Chemistry Chemical Engineering and Material Science Zaozhuang University

A facile strategy is introduced to upgrade thermomechanical stability of the cesium pentahydrogen diphosphate(CPD), which is the most efficient inorganic electrolyte among all solid proton conductors,by constructing P–OH···F hydrogen bonds with lanthanum fluoride(LaF_3). The optimal combination of the LaF_3–CPD composite electrolyte is found to be 1:2 in a molar ratio(LaF_3–CPD-2). LaF_3–CPD-2 composite maintains robust solid state, even at a temperature up to 200 °C, which is 50 °C higher than the melting temperature of CPD. Meanwhile, the considerable proton conductivity of CPD is achieved in the LaF_3–CPD-2 composite electrolyte due to the synergistic effect of the P–OH···F hydrogen bonds and the intrinsic proton conductive property of CPD. Last but not least, the LaF_3–CPD-2 composite manifests excellent conductivity durability at 150 °C and low humidity condition with sizeable proton conductivity of0.0262 S cm^(-1) after 60 h operation, implying that the LaF_3–CPD composite could be a promising candidate for intermediate temperature proton conductors.

关键词： Intermediate temperature fuel cell Hydrogen bond Cesium pentahydrogen diphosphate Lanthanum fluoride Thermomechanical stability

Geometrical structures, and electronic and transport properties of a novel two-dimensional β-GaS transparent conductor

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Nano Research 2015年第10期8卷 3177-3185页

作者： Zhangxian Chen Liang Huang Yongjie Xi Ran Li Wanchao Li Guoqin Xu hansong cheng DepartmentofChemistry NationalUniversityofSingaporeSingapore117543Singapore SustainableEnergyLaboratory ChinaUniversityofGeosciencesWuhanWuhan430074China DepartmentofChemicalandPetroleumEngineering UniversityofWyomingWY82071USA

Two-dimensional （2D） materials are highly promising for flexible electronics, and graphene is the only well-studied transparent conductor. Herein, density functional theory has been used to explore a new transparent conducting material via adsorption of H on a 2D β-GaS sheet. This adsorption results in geometrical changes to the local structures around the H. The calculated electronic structures reveal metallic characteristics of the 2D α-GaS material upon H adsorption and a large optical band gap of 2.72 eV with a significant Burstein-Moss shift of 0.67 eVo The simulated electrical resistivity is as low as 10^-4 Ω.cm, comparable to the benchmark for ITO thin films.

关键词： β-GaS two-dimensional materialtransparent conductor density functional theory transport property

Semi-interpenetrating polymer networks toward sulfonated poly(ether ether ketone) membranes for high concentration direct methanol fuel cell

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Chinese Chemical Letters 2019年第2期30卷 299-304页

作者： Xupo Liu Yunfeng Zhang Shaofeng Deng Cuicui Li Jiaming Dong Jiaying Wang Zehui Yang Deli Wang hansong cheng Sustainable Energy Laboratory Faculty of Materials Science and Chemistry China University of Geosciences (Wuhan) Key Laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology) Ministry of Education Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Low methanol permeability of proton exchange membranes (PEMs) is greatly important for direct methanol fuel cells (DMFCs). Here, sulfonated poly (ether ether ketone) (SPEEK) based semiinterpenetrating polymer networks (semi-IPNs) are successfully prepared by interpenetrating SPEEK into the in-situ synthesized crosslinking networks. The polymeric networks are formed by the covalent bonds between bromobenzyl groups of bro mo methylated poly (phenylene oxide) and amine groups of diamine linkers as well as the ionic bonds between amine species and sulfonated groups. Two linkers without and with sulfonated groups are applied to fabricate the semi-IPNs. The core properties of the membranes, like phase separation, water uptake, proton conductivity and methanol permeability, are systematically studied and compared. The DMFCs assembled by using the semi-IPN membranes display better performance than Nafion 117 in high concentration methanol solutions. The present work provides a facile way to prepare PEMs with enhanced DMFC performance.

关键词： Direct methanol fuel cell Proton exchange membrane Semi-interpenetrating polymer networks Sulfonated poly(ether ether ketone) Bromomethylated poly(phenylene oxide)

Application of diatomite as an effective polysulfides adsorbent for lithium-sulfur batteries

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Journal of Energy Chemistry 2017年第6期26卷 1267-1275页

作者： Zhong Li Nan Zhang Yubao Sun Hanzhong Ke hansong cheng Sustainable Energy Laboratory Faculty of Material Science and ChemistryChina University of Geosciences(Wuhan)Wuhan 430074HubeiChina

The lithium–sulfur batteries show the great potential to be the most promising candidate for high energy applications. However, the shuttling of soluble polysulfides deteriorates the battery performance tremendously. To suppress the diffusion of soluble polysulfides, diatomite that has abundant natural three-dimensional ordered pores is incorporated into the cathode to trap polysulfides. The composite cathode material(S-DM-AB for short), including sulfur(S), diatomite(DM), and acetylene black(AB) is prepared by an impregnation method. For comparison, another composite cathode material(S-AB for short) including sulfur and acetylene black is also prepared by the same method. The battery with S-DMAB composite cathode material delivers a discharge capacity of 531.4 m Ah/g after 300 cycles at 2 C with a capacity retention of 51.6% at room temperature. By contrast, the battery with S-AB composite cathode material delivered a capacity of only 196.9 m Ah/g with a much lower capacity retention of 18.6% under the same condition. The addition of diatomite in the cathode is proved to be a cheap and effective way to improve the life time of the lithium sulfur batteries.

关键词： Lithium–sulfur batteries Diatomite Adsorbent Cycle performance

THE THEORETICAL STUDY OF THE TRANSITION STATE OF THE REACTION H2C=N=N—■H2 AND ITS REACTION PATH

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Science in China,Ser.B 1988年第4期31卷 385-392页

作者：程寒松唐敖庆 Institute of Theoretical Chemistry Jilin University. Chungchun

By means of energy gradient, the optimized geometries of diazomethane, diazirine and the transitionstate of the unimolecular reaction are discussed on the ground potential energy surface calculated byMINDO/3 SCF method. The nine vibrational normal modes in the transition state and the reaction pathcalculated with Fukui’s IRC equation are also studied. The symmetry of the C_s point group of thereaction system is conserved throughout the reaction path. The MO correlation diagram shows that thisunimolecular reaction is symmetry admitted.

关键词： THE THEORETICAL STUDY OF THE TRANSITION STATE OF THE REACTION H2C=N=N H2 AND ITS REACTION PATH THE THEORETICAL STUDY OF THE TRANSITION STATE OF THE REACTION H2C IRC very than

Cobalt nitride nanoparticles supported on carbon nanotubes as efficient electrocatalyst for rechargeable Zinc-air batteries

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Cobalt nitride nanoparticles supported on carbon nanotubes a...

A lithium ion full battery enabled by a poly aryl ether based single ion conducting polymer electrolyte

中国化学会第二十次全国电化学大会

作者： Ruizhi Xu Zehui Yang hansong cheng Sustainable Energy Laboratory Faculty of Materials Science and ChemistryChina University of Geosciences

The increat demand for sustainable and clean energy has induced enormous research for efficient,zero-emission and cost-effective energy storage and conversion *** zincair batteries（ZABs） have attracted considerable ...

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A lithium ion full battery enabled by a poly aryl ether base...

Current Status and Future Prospects of Research on Single Ion Polymer Electrolyte for Lithium Battery Applications

中部四省化学化工学会2016年学术年会

作者： Yazhou Chen Hanzhong Ke Danli Zeng Yubao Sun hansong cheng Sustainable Energy Laboratory China University of Geosciences

The importance of enhancing up transference number of lithium ion to unit has been recognized by both numerical simulation and experiment,avoiding of concentration polarization and thus improve the battery *** single ion conductor requires the immobilization of super-weak coordinated anion in the polymer chain.4,4’-dicarboxyl bis(benzene sulfonyl)imide has been designed and synthesized as a building block to copolymerize with other small units to form a series of copolymers via *** the fact that the mobility of the main chain is restricted by the rigid amides,a bis sulfonyl imide included poly aryl ether polymeric single ion conductor has been *** ionic conductivity of the blend film is a high as 0.41 mS cm at room temperature with the lithium ion transference number of 0.93.A single ion conductive polymeric lithium ion full battery was assembled with the single ion conductor as the separator as well as the electrolyte,Li Fe PO4 mixed with ionomers as the positive electrode and LiTiO mixed with ionomers as the negative *** electrochemical performance for this full cell is shown in *** oxidation and reduction peaks of the full cell lies between that of LTO and LFP with the initial oxidation peak potential of 2.01 V and reduction peak potential of 1.68 *** full-cell delivers 125 mA h g at 0.05 C,112 mA h g at 0.1 C,108 mA h g at 0.2 C,103 mA h g at 0.4 C,95 mA h g at 0.6 C,83 mA h g at 0.8 C,68 mA h g at 1 C,and reverts to around 96 mA h g at 0.5 ***,the full cell keeps at 96 mA h g at 0.5 C for 100 cycles with 100 % of coulombic efficiency,indicating a well-connected ion transport network in the full cell as well as stable SEI films.

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Journal of the Chinese Ceramic Society 2014年第1期1卷 78-92页

作者： CAI Weiwei LI Jing ZHANG Yunfeng XU Guodong ROHAN Rupesh SUN Yubao cheng hansong Department of Chemistry National University of Singapore Sustainable Energy Laboratory China University of Geosciences Wuhan

Recent research activities on single ion polymer electrolyte(SIPE) that provides a simple but important way to solve problems related to battery safety and lithium dendrite formation for lithium based battery applications were reviewed. Improvement in both ionic conduction property and battery performance has been achieved during the last two decades. The ionic conduction mechanisms to guide SIPE molecular structure design, membrane preparation and battery assembling have been more clarified. Prototypes with both gel and all-solid systems have been demonstrated with acceptable performance and stability. In addition, the future prospects for the development of SIPE materials in lithium battery applications were also described.

关键词： lithium batteries single ion polymer electrolyte current status future prospects

An in-situ nano-scale etching-filling strategy for overall performance improvement of Nafion membrane

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An in-situ nano-scale etching-filling strategy for overall p...