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Sulfur-decorated nanomesh graphene for high-performance supercapacitors

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Chinese Chemical Letters 2017年第12期28卷 2277-2280页

作者： Yanfang Kan Guoqing Ning xinlong ma State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China

Sulfur-decorated nanomesh graphene （S@G） has been synthesized by a 155℃ heat treatment of a mixture of nanomesh graphene and S. The as-obtained S@G materials keep a high specific surface area, and exhibit obviously enhanced conductivity and hydrophilicity as compared to the pristine graphene. X-ray photoelectron spectroscopy and thermogravimetric analysis indicate that most S atoms in the S@G samples are stably combined with nanomesh graphene via covalent bonds rather than exist as free elemental S. As an electrode material for aqueous supercapacitors, the S@G with a S content of 5 wt% delivers a specific capacitance up to 257 Fig at the current density of 0.25 A/g, which is 23.6% higher than that of the undoped graphene. Our results provide a simple approach to scalable synthesis of S-doped porous carbon materials, which have potential applications in the high-performance capacitive energy storage devices.

关键词： Sulfur-decorated Graphene Supercapacitor Doping High performance

EAE-Net:effective and efficient X-ray joint detection

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Optoelectronics Letters 2024年第10期20卷 629-635页

作者： WU Zhichao WAN Mingxuan BAI Haohao ma Jianxiong ma xinlong School of Control Science and Engineering Tiangong UniversityTianjin300387China Orthopaedics Institute Tianjin HospitalTianjin UniversityTianjin300211China

The detection and localization of bone joint regions in medical X-ray images are essential for contemporary medical *** methods rely on subjective interpretation by physicians,leading to variability and potential *** bone joint detection techniques have become feasible with advancements in general-purpose object ***,applying these algorithms to X-ray images faces challenges due to the domain *** overcome these challenges,a novel framework called effective and efficient network(EAE-Net)is *** incorporates a context augment module(CAM)to leverage global structural information and a ghost bottleneck module(GBM)to reduce redundant *** EAE-Net model achieves exceptional detection performance,striking a balance between accuracy and *** advancement improves efficiency,enabling clinicians to focus on critical aspects of diagnosis and treatment.

关键词： overcome striking ghost

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Self-assembly with varying hydrophobic centers:Synthesis of red blood cell-like basic magnesium carbonate microspheres

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Particuology 2015年第5期13卷 145-150页

作者： xinlong ma Guoqing Ning Bing Chen Chuanlei Qi Xingying Lan Jinsen Gao State Key Laboratory of Heavy Oil Processing China University of Petroleum

Basic magnesium carbonate microspheres with a red blood cell （RBC）-like appearance and diameters of ~3μm were synthesized by amphiphilic molecule-participated self-assembly under hydrothermal conditions, In the self-assembly, sodium dodecyl benzene sulfonate served as a template for the formation of Mg（OH）2 spherical micelles and also as a reactant precursor that releases CO2 to react with Mg（OH）2. The growth of the microspheres is driven by the continuous generation of new hydrophobic centers because of the consumption of hydrophilic poles （--SO3-）. The surfactant-directed self-assembly can be applied to the synthesis of other carbonate or metallic oxide self-assemblies, indicating that it is a universal self-assembly method for amphiphilic molecules.

关键词： Self-assembly Red blood cell-like Basic magnesium carbonate Microspheres

Exfoliated multi-layered graphene anode with the broadened delithiation voltage plateau below 0.5 V

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Journal of Energy Chemistry 2020年第10期29卷 233-242页

作者： xinlong ma Xinyu Song Yushu Tang Enzuo Liu Chenggen Xu Chuanlei Qi Yun Li Jinsen Gao Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng 224051JiangsuChina School of materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional materials Tianjin UniversityTianjin 300072China

The commercial graphite(CG)is the conventional anode material for lithium ion batteries(LIBs)due to its low delithiation voltage plateau(below 0.5 V)and extraordinary ***,the further promotion of energy density of LIBs is restricted by the limited capacity below 0.5 V of ***,based on the supercritical CO2 exfoliation technique,the production of multi-layered graphene(MLG)is achieved from the pilot scale production *** great merit of the exfoliated MLG anode is that the voltage plateau below 0.5 V is broadened obviously as compared to those of natural graphite and ***,no obvious lithium dendrites are observed for MLG during the lithiation *** large delithiation capacity under the low voltage plateau of MLG is mainly benefited from the combination of Li intercalation and boundary storage mechanism,which is further confirmed by the density functional theory *** LiFePO4/MLG full cell can afford the satisfactory electrochemical property with respect to the capacity,energy density and ultralong cycling stability(90%capacity retention after 500 cycles at 2 C),significantly better than that of LiFePO4/***,this developed technique not only dedicates to producing the high-performance anode for LIBs but also opens a door for the mass production of MLG in the industrial scale.

关键词： Multi-layered graphene Supercritical CO2 exfoliation Anode Broadened delithiation voltage plateau Intercalation and boundary storage

Wharton’s jelly MSC-derived extracellular vehicles-loaded hyaluronic acid-alginate adhesives for treatment of osteoarthritis

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Journal of materials Science & Technology 2023年第11期142卷 240-252页

作者： Yanhong Zhao Xige Zhao Hainan Xu Yi Xing Tengling Wu Xun Sun Mingjie Kuang xinlong ma Wenguang Liu Qiang Yang School and Hospital of Stomatology Tianjin Medical UniversityTianjin 300070China School of materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300350China Department of Spine Surgery Tianjin HospitalTianjin UniversityTianjin 300211China Laboratory of Molecular Signaling and Stem Cells Therapy Molecular Laboratory for Gene Therapy and Tooth RegenerationBeijing Key Laboratory of Tooth Regeneration and Function ReconstructionCapital Medical University School of StomatologyBeijing 100050China Department of Orthopedics the Provincial Hospital Affiliated to Shandong UniversityShandong 250014China

The repair of cartilage injury caused by osteoarthritis(OA)has long plagued *** stem cell(MSC)-derived small extracellular vesicles(sEVs)show great potential in cartilage regeneration and immunoregulation to realise cell-free ***,unprotected sEVs are prone to be washed away by the flow of fluids and degraded in *** this work,we successfully revealed that human Wharton’s jelly of umbilical cord-derived MSC(hWJMSC)sEVs promote proliferation,inhibit apoptosis,and attenuate the inflammation of chondrocytes in *** light of the long period required for cartilage regeneration,we synthesised an injectable and adhesive aldehyded sodium alginate crosslinked acylhydrazide-modified hyaluronic acid(ALG-CHO/HHA)hydrogel loaded with sEVs to boost the reparative effect of the *** hydrogel-bearing sEVs was injected into cartilage defects where they adhered to the cartilage *** this configuration,the sEVs were delivered in a sustainable manner with the degradation of the hydrogel at the injury sites,thus contributing to highly efficient cartilage repair by regulating the regenerative and immune *** ALG-CHO/HHA-sEV platform meets the clinical demand for long-lasting repair with a single ***,this work provides a new idea and theoretical basis for the clinical application of sEVs in the treatment of OA.

关键词： Extracellular vesicles Hydrogel Osteoarthritis Cartilage regeneration

Porous carbon spheres anode with the stable output of low delithiation plateau and constant delithiation ratio for lithium ion hybrid capacitor

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Particuology 2021年第5期19卷 196-205页

作者： Mingzhen Wu Zipan Yang Shengping Li Xuejie Wang Chenggen Xu Rundan Lin Xilu Zhang xinlong ma Guoyong Huang Jinsen Gao State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijingChangping 102249China

Porous carbon spheres derived from the facile hydrothermal treatment associated with the calcination process exhibit the good spherical morphology and unique porous *** the Li-based half-cell test,porous carbon spheres electrode not only exhibits larger reversible capacities and better compatibility as compared to the widely-used graphite,but also provides stable delithiation plateaus under different current ***,the delithiation ratio below 1 V almost accounts for a constant value(around 70%)with the increase of current density,evidencing that Li intercalation storage is the dominant model and Li insertion/extraction processes are *** lithium ion hybrid capacitor configured with S-doped mesoporous graphene and porous carbon spheres as cathode and anode,delivers satisfied energy and power densities(up to 177 Wh kg^(−1) and 12,303 W kg^(−1),respectively)as well as long-term cyclability,which is superior to the corresponding S-doped mesoporous graphene//graphite and activated carbon//porous carbon *** addition,the developed synthesis strategy is in favor of the realization of the scalable production of porous carbon spheres.

关键词： Porous carbon spheres Low delithiation plateau Delithiation ratio Anode performance Lithium ion hybrid capacitor

Extraordinary Compatibility to mass Loading and Rate Capability of Hierarchically Porous Carbon Nanorods Electrode Derived from the Waste Tire Pyrolysis Oil

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Energy & Environmental materials 2022年第4期5卷 1238-1250页

作者： Shengping Li Zipan Yang Mingzhen Wu Chenggen Xu Xilu Zhang Rundan Lin Xuejie Wang Lu Zhao Dong Sun xinlong ma Jinsen Gao State Key Laboratory of Heavy Oil Processing China University of PetroleumChangpingBeijing 102249China

The conversion of waste tire pyrolysis oil(WTPO)into S-doped porous carbon nanorods(labeled as WPCNs)with hierarchical pore structure is realized by a simple template-directed *** specific surface area of as-obtained porous carbon nanorods can reach up to 1448 m^(2) g^(−1) without the addition of any activating *** the capacitive electrode,WPCNs possess the extraordinary compatibility to capacitance,different electrolyte systems as well as long-term cycle life even at a commercial-level areal mass loading(10 mg cm^(−2)).Besides,only an extremely small capacitance fluctuation is observed under the extreme circumstance(−40 to 80℃),reflecting the excellent high-and low-temperature *** relationship between the pore structure and capacitive behavior is analyzed by comparing WPCNs with mesopores-dominated asphalt-derived porous carbon nanorods(APCNs)and micropores-dominated activated *** molecular dynamics simulation further reveals the ion diffusion and transfer ability of the as-prepared carbon materials under different pore size *** total ion flow(NT)of WPCNs calculated by the simulation is obviously larger than APCNs and the N_(T) ratio between them is similar with the experimental average capacitance ***,this work also provides a valuable strategy to prepare the electrode material with high capacitive energy storage ability through the high value-added utilization of WTPO.

关键词： compatibility high-and low-temperature performance high areal mass loading porous carbon nanorods waste tire pyrolysis oil

Directing in-situ self-optimization of single-atom catalysts for improved oxygen evolution

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Journal of Energy Chemistry 2023年第5期80卷 284-290,I0007页

作者： Peiyu ma Chen Feng Huihuang Chen Jiawei Xue xinlong ma Heng Cao Dongdi Wang Ming Zuo Ruyang Wang Xilan Ding Shiming Zhou Zhirong Zhang Jie Zeng Jun Bao Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of SciencesKey Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesDepartment of Chemical PhysicsUniversity of Science and Technology of ChinaHefei230026AnhuiChina National Synchrotron Radiation Laboratory iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)University of Science and Technology of ChinaHefei 230026AnhuiChina

The demand for clean and sustainable energy has encouraged the production of hydrogen from water *** overcome the obstacle to improving the efficiency of water electrolyzers,it is highly desired to fabricate active electrocatalysts for the sluggish oxygen evolution ***,there is generally an intrinsic gap between the as-prepared and real electrocatalysts due to structure evolution under the oxidative reaction ***,we combine in-situ anionic leaching and atomic deposition to realize single-atom catalysts with self-optimized *** introduced F ions facilitate structural transformation from Co(OH)xF into CoOOH(F),which generates an amorphous edge surface to provide more anchoring sites for Ir single ***,the in-situ anionic leaching of F ions elevates the Co valence state of Ir_(1)/CoOOH(F)more significantly than the counterpart without F ions(Ir_(1)/CoOOH),leading to stronger adsorption of oxygenated *** revealed by electrochemical measurements,the increased Ir loading together with the favored adsorption of*OH intermediates improve the catalytic activity of Ir_(1)/CoOOH(F).Specifically,Ir_(1)/CoOOH(F)delivered a current density of 10 ma cm-2at an overpotential of 238 mV,being lower than 314 mV for Ir_(1)/*** results demonstrated the facility of the in-situ optimization process to optimize catalyst structure for improved performance.

关键词： Electrocatalysis Single-Atom Catalysis Self-Optimization Oxygen Evolution

S-doped porous carbon fibers with superior electrode behaviors in lithium ion batteries and fuel cells

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materials Reports(Energy) 2022年第4期2卷 62-71页

作者： Peng Jin Long Li Xiaohu Gu Yanshao Hu Xiaojing Zhang Xiongchao Lin xinlong ma Xing He State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization China Pingmei Shenma GroupPingdingshan467000PR China Delight Technology Development(Beijing)Co. Ltd.Beijing100083PR China School of Chemical&Environmental Engineering China University of Mining&Technology(Beijing)Beijing100083PR China State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijingChangping102249PR China Graduate School of Engineering Tohoku UniversitySendaiMiyagi980-8576Japan

The orientation construction of S-doped porous carbon fibers(SPCFs)is realized by the facile template-directed methodology using asphalt powder as carbon *** unique fiber-like morphology without destruction can be well duplicated from the template by the developed ***4 fibers serve as both templates and S dopant,realizing the in-situ S doping into carbon *** effects of different reaction temperatures on the yield and S doping level of SPCFs are *** S doping can not only significantly enhance the electrical conductivity,but also introduce more defects or *** anode material for lithium ion batteries(LIBs),SPCFs electrode delivers better rate capability than undoped *** the capacity of SPCFs electrode retains around 90%after 300 cycles at 2 A g1,exhibiting good cycling *** the electrocatalysts for fuel cells,the onset potentials of SPCFs obtained at 800 and 900C are concentrated at 0.863 V,and the higher kinetic current densities at 0.4 V of them are larger than that of PCFs,demonstrating the superior electrocatalytic *** to the synergistic effect of abundant pore channels and S doping,SPCFs electrode exhibits superior electrochemical performances as anode for LIBs and elecctrocatalyst for fuel cells,***,the oriented conversion of asphalt powder into high-performance electrode material in this work provides a new way for the high value application of asphalt.

关键词： S-doped porous carbon fibers Template-directed methodology Lithium ion batteries Anode Fuel cells Electrocatalyst