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Optimization of the methane production in batch anaerobic digestion of maize straw by adjustment of total solid and substrate-to-inoculum ratio based on kinetics

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 225-231页

作者： Feng Zhen Tao Xing Lianhua Li Yongming Sun Hongqiong Zhang Guangzhou Institute of Energy Conversion Chinese Academy of SciencesGuangzhou 510640China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou 510640China College of Engineering Northeast Agricultural UniversityHarbin 150030China

Anaerobic digestion(AD)operating under conditions of organic overload stress typically exacerbates the potential for process instability,thereby resulting in significant economic and ecological ramifications.In this investigation,an augmented substrate-to-inoculum ratio(S/I)along with varying total solid content(TS)levels was employed to replicate diverse organic loadings,utilizing maize straw and cattle manure.The findings reveal that a moderate augmentation in S/I and TS proves advantageous in augmenting methane yield,while an excessive substrate loading diminishes methane yield,hampers the kinetics of methane production,and even induces severe process instability.Kinetic study also displayed the variation of the model parameters for the first-order model,the modified Gompertze model,and the transfer function model.Both the modified Gompertze model and transfer function model exhibited the same environmental stress trend.Thus,both the increase in particulate content and the increase in S/I had a substantial effect on the substrate conversion rate to methane.Microbial analysis demonstrates the dominant influence of Firmicutes and Methanosarcina under different organic loading stresses.From both a kinetic and a microbiological point of view,this work provides novel insights into the fundamental processes that regulate anaerobic digestion(AD)under varying loading stress.Furthermore,it has significant implications for improving the operating efficiency of AD,which is a significant benefit.

关键词： maize straw dry anaerobic digestion methane production microbial characteristics kinetic model

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One-pot pyrolysis route to Fe−N-Doped carbon nanosheets with outstanding electrochemical performance as cathode materials for microbial fuel cell

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 207-214页

作者： Yong sun Zezhen Zhang Yongming Sun Gaixiu Yang College of Engineering Northeast Agricultural UniversityHarbin 150030China Guangzhou Institute of Energy Conversion Chinese Academy of SciencesCAS Key Laboratory of Renewable EnergyGuangdong Provincial Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou 510640China

The naturally lackadaisical kinetics of oxygen reduction reaction(ORR)in the cathode is one of the important factors that restrict the development of air-cathode microbial fuel cells(MFCs).In this work,the iron-nitrogen-carbon hierarchically nanostructured materials had been successfully fabricated by pyrolyzing glucose,iron chloride,and dicyandiamide with the aim of solving the issue.The obtained catalyst with an ultrathin nanostructure demonstrated an idiosyncratic electrocatalytic activity caused by the high content introduction of nitrogen and iron atoms,large surface area,which will offer sufficient active sites for improving the charge/mass transfer and reducing the diffusion resistance.Furthermore,with the increase of N dopant in the catalyst,better ORR catalytic activity could be achieved.Illustrating the N doping was beneficial to the ORR process.The high content of N,BET surface area caused by the N increasing could be responsible for the superior performance according to results of X-Ray photoelectron spectroscopy(XPS),Raman and Brunner-Emmet-Teller(BET)analysis.The ORR on the Fe-N3/C material follows 4e−pathway,and MFCs equipped with Fe-N3/C catalyst achieved a maximum power density(MPD)of 912 mW/m2,which was 1.1 times of the MPD generated by the commercial Pt/C(830 mW/m2).This research not only provided a feasible way for the fabrication of Pt-free catalyst towards oxygen reduction but also proposed potential cathode catalysts for the development of MFCs.

关键词： one-pot pyrolysis route Fe−N-Doped carbon nanosheets microbial fuel cells iron-nitrogen co-doping carbon based catalyst electrochemical performance cathode materials

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In Situ Formation of LiF-Rich Carbon Interphase on Silicon Particles for Cycle-Stable Battery Anodes

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Transactions of Tianjin University 2023年第2期29卷 101-109页

作者： Yang Ni Shuibin Tu Renmin Zhan Zhao Cai Xiaohong Wang Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Faculty of Materials Science and Chemistry China University of Geosciences(Wuhan)Wuhan 430074China

Silicon(Si)is a potential high-capacity anode material for the next-generation lithium-ion battery with high energy density.However,Si anodes suff er from severe interfacial chemistry issues,such as side reactions at the electrode/electrolyte interface,leading to poor electrochemical cycling stability.Herein,we demonstrate the fabrication of a conformal fl uorine-containing carbon(FC)layer on Si particles(Si-FC)and its in situ electrochemical conversion into a LiF-rich carbon layer above 1.5 V(vs.Li^(+)/Li).The as-formed LiF-rich carbon layer not only isolates the active Si and electrolytes,leading to the suppression of side reactions,but also induces the formation of a robust solid-electrolyte interface(SEI),leading to the stable interfacial chemistry of as-designed Si-FC particles.The Si-FC electrode has a high initial Coulombic effi ciency(CE)of 84.8%and a high reversible capacity of 1450 mAh/g at 0.4 C(1000 mA/g)for 300 cycles.In addition,a hybrid electrode consisting of 85 wt%graphite and 15 wt%Si-FC,and mass 2.3 mg/cm^(2) loading delivers a high areal capacity of 2.0 mAh/cm^(2) and a high-capacity retention of 93.2%after 100 cycles,showing the prospects for practical use.

关键词： Lithium-ion batteries Silicon anode LiF-rich carbon interphase Capacity Cycling stability

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Rapid decrease in Antarctic sea ice in recent years

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Acta Oceanologica Sinica 2021年第7期40卷 119-128页

作者： Guanghua Hao Hui Shen Yongming Sun Chunhua Li Key Laboratory of Marine Hazards Forecasting National Marine Environmental Forecasting CenterMinistry of Natural ResourcesBeijing 100081China Key Laboratory of Physical Oceanography College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdao 266100China Pilot National Laboratory for Marine Science and Technology(Qingdao) Qingdao 266237China

A 41-year Antarctic sea ice concentration(SIC)dataset derived from satellite passive microwave radiometers during the period of 1979–2019 has been used to analyze sea ice changes in recent decades.The trends of SIC and sea ice extent(SIE)are calculated during the periods of 1979–2019,1979–2013,and 2014–2019.The trends show regionally dependent features.The SIC shows an increasing trend in most of the regions except the Bellingshausen Sea and Amundsen Sea(BA)during 1979–2019 and 1979–2013.The SIE trend shows a decreasing or decelerating trend in the period of 1979–2019((6835±2210)km^(2)/a)compared with the 1979–2013 period((18600±2203)km^(2)/a).In recent years(2014–2019),the SIC and SIE have exhibited decreasing trends(–(34567±3521)km^(2)/month),especially in the Weddell Sea(WS)and Ross Sea(RS)during summer and autumn.The trends are related to regionally dependent causes.The analyses show that the SIC and SIE decreased in response to the warming trend of 2 m air temperature(T_(a-2m))and have exhibited a good relationship with T_(a-2m) in summer and autumn in recent years.The sea ice decrease in the Antarctic is mainly caused by increases in absorbed energy and southward energy transportation in recent years,such as the increase in gained solar radiation and moist static energy from the south,which demonstrate notable regional characteristics.In the WS region,the local positive feedback from the additional absorbed solar radiation,resulting in warmer air and reduced sea ice,is the main reason for the sea ice decrease in recent years.The increase in southward energy transport has also favored a decrease in sea ice.In the RS region,the increase in southward-transported moist static energy has contributed to the decrease in sea ice,and the increases in cloud cover and longwave radiation have prevented sea ice growth.

关键词： sea ice Antarctic decreasing atmosphere

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A Bionic Degassing Device Inspired by Gills:Application on Underwater Oil and Gas Detection

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Journal of Bionic Engineering 2023年第1期20卷 253-266页

作者： yongming Yao Hang Li Youhong sun Zhiyong Chang School of Mechanical and Aerospace Engineering Jilin UniversityChangchun130025China School of Engineering and Technology China University of GeosciencesBeijing100080China National-Local Joint Engineering Laboratory of In Situ Conversion Drilling and Exploitation Technology for Oil ShaleJilin UniversityChangchun130021China Key Laboratory of Bionic Engineering Ministry of EducationJilin UniversityChangchun130022China College of Biological and Agricultural Engineering Jilin UniversityChangchun130022China

Over the past decades,membrane-based separation processes have found numerous applications in various industries.Membrane contactor is an important part of the separation of dissolved gas in the early stage of gas detection.In this paper,to improve efficiency in the detection of the dissolved gas phase in seawater,a better flat membrane contactor is proposed to achieve efficient degassing,inspired by the way fish breathe underwater and the special structure of fish gills.The bioinspired flow channel structures in the flat membrane contactor are suggested along with the distribution of internal blood vessels in the gill platelet and the feature of the gill platelet surface.Using 3D printing,the special degassing devices are manufactured,and comparative analysis of relevant flow parameters is made using different flow channels,combined with the CFD simulation.The final result showed that the proposed flow channel in the degasser achieves a better degassing effect compared with conventional flow channel when the membrane contact area is limited,which can provide good conditions for subsequent gas detection.

关键词： Bionic degassing device Gills Flat membrane contact Gas-liquid separation-Oil and gas detection

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Confining ultrafine Li3P nanoclusters in porous carbon for highperformance lithium-ion battery anode

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Nano Research 2020年第4期13卷 1122-1126页

作者： Eryang Mao Wenyu Wang Mintao Wan Li Wang Xiangming He Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

High-capacity lithium-containing alloy anodes(e.g.,Li4.4Si,Li4.4Sn,and Li3P)enable lithium-free cathodes(e.g.,Sulfur,V2O5,and FeF3)to produce next-generation lithium-ion batteries(LIBs)with high energy density.Herein,we design a Li3P/C nanocomposite with Li3P ultrafine nanodomains embedded in micrometer-scale porous carbon particles.Benefiting from the unique micro/nanostructure of the Li3P/C nanocomposite,electrons transfer rapidly through the conductive pathway provided by the porous carbon framework and the volume change between Li3P and P is confined in the nanopores of the carbon,which avoids the collapse of the whole Li3P/C composite particles.As expected,the as-achieved Li3P/C nanocomposite provided a high available lithium-ion capacity of 791 mAh/g(calculated based on the mass of Li3P/C)at 0.1 C during the initial delithiation process.Meanwhile,the Li3P/C nanocomposite showed 75%of its 0.5 C capacity at 6 C and stable cycling stability.

关键词： Li3P nanoclusters porous carbon lithium-containing anode high capacity lithium-ion batteries

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Anode corrosion in aqueous Zn metal batteries

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eScience 2023年第1期3卷 2-13页

作者： Zhao Cai Jindi Wang Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Faculty of Materials Science and Chemistry China University of Geosciences(Wuhan)Wuhan 430074China Institute of New Energy on Chemical Storage and Power Sources College of Applied Chemistry and Environmental EngineeringYancheng Teachers UniversityYancheng 224000China

Given their low cost and intrinsic safety,aqueous Zn metal batteries(AZMBs)are drawing increasing attention in the field of smart grids and large-scale energy storage.However,the Zn metal anode in aqueous electrolyte suffers from a critical issue,corrosion,which must be fully addressed before the practical implementation of AZMBs.In this perspective,the mechanisms of aqueous Zn metal anode corrosion in both alkaline and neutral electrolytes are compared and discussed.The methods for studying the corrosion processes and the strategies for Zn corrosion protection in AZMBs are also summarized.Finally,some expectations about potential research directions for making corrosion-resistant AZMBs a commercial reality are provided.

关键词： Aqueous batteries Zn metal anode Chemical oxidation Electrochemical hydrogen evolution Corrosion mechanism Surface protection

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Liver-specific deficiency of TMEM30A develops spontaneous hepatocellular carcinoma

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Gastroenterology Report 2023年第1期11卷 536-538页

作者： Leiming Liu Zhiqing Xia yongming Zhang Jingjing Su Leimin sun Lingling Zhang International Institutes of Medicine The Fourth Affiliated HospitalZhejiang University School of MedicineYiwuZhejiangP.R.China Laboratory of Applied Pharmacology and Department of Pharmacology College of PharmacyWeifang Medical UniversityWeifangShandongP.R.China Department of Gastroenterology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiangP.R.China

Introduction Hepatocellular carcinoma is the third leading cause of cancer deaths worldwide and mainly originates from chronic liver diseases[1].It is essential to establish a stable and effective model for studying hepatocellular carcinomas.At present,chemical induction is the most common method to establish liver cancer models in mice,in which diethylnitrosamine(DEN)and carbon tetrachloride(CCl4)are the main inducers[2].It simulates well the natural formation process of liver cancer,but the induction time is long.Human primary liver cancer organoids retain livertissue function and genetic stability[3].

关键词： hepatocellular cancer diseases

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Insights on“nitrate salt”in lithium anode for stabilized solid electrolyte interphase

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Carbon Energy 2022年第1期4卷 12-20页

作者： Lin Fu Xiancheng Wang Zihe Chen Yuanjian Li Eryang Mao Zhi Wei Seh Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanChina Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

A Li/KNO_(3) composite(LKNO),with KNO_(3) uniformly implanted in bulk metallic Li,is fabricated for battery anode via a facile mechanical kneading approach,which exhibits high Coulombic efficiency and prolonged cycle life.The mechanism behind the enhanced electrochemical performance of the“salt-in-metal”composite is investigated,where KNO_(3) in metallic Li composite electrode would be sustainably released into the electrolyte.The presence of NO_(3)-stabilizes the solid electrolyte interphase by producing functional Li_(3)N,LiNxOy,and Li_(2)O species.K^(+)from KNO_(3) also helps to form an electrostatic shield after its adsorption on the electrode protrusions,which suppresses the dendritic growth of metallic Li.With the above advantages,uniform Li plating with dense and planar structure is realized for the LKNO electrode.These findings reveal a deep understanding of the effect of the“saltin-metal”anode and provide new insights into the use of nitrate additives for high-energy-density Li metal batteries.

关键词： electrostatic shield Li metal battery Li/KNO_(3)composite salt-in-metal stabilized solid electrolyte interphase sustained release

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Catalytic anode surface enabling in situ polymerization of gel polymer electrolyte for stable Li metal batteries

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Nano Research 2024年第6期17卷 5216-5223页

作者： Guocheng Li Kang Liang Yuanjian Li Xiangrui Duan Lin Fu Zhao Cai Zhaofu Zhang Jiangnan Dai Yongming Sun Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China The Institute of Technological Sciences Wuhan UniversityWuhan 430074China Faculty of Materials Science and Chemistry China University of Geoscience(Wuhan)Wuhan 430074China

Employing quasi-solid-state gel polymer electrolyte(GPE)instead of the liquid counterpart has been regarded as a promising strategy for improving the electrochemical performance of Li metal batteries.However,the poor and uneven interfacial contact between Li metal anode and GPE could cause large interfacial resistance and electrochemical Li stripping/plating inhomogeneity,deteriorating the electrochemical performance.Herein,we proposed that the functional component of composite anode could work as the catalyst to promote the in situ polymerization reaction,and we experimentally realized the integration of polymerized-dioxolane electrolyte and Li/Li_(22)Sn_(5)/LiF composite electrode with low interfacial resistance and good stability by in situ catalyzation polymerization.Thus,the reaction kinetics and stability of metallic Li anode were significantly enhanced.As a demonstration,symmetric cell using such a GPE-Li/Li_(22)Sn_(5)/LiF integration achieved stable cycling beyond 250 cycles with small potential hysteresis of 25 mV at 1 mA·cm^(−2)and 1 mAh·cm^(−2),far outperforming the counterpart regular GPE on pure Li.Paired with LiNi0.5Co0.3Mn0.2O2,the full cell with the GPE-Li/Li_(22)Sn_(5)/LiF integration maintained 85.7%of the original capacity after 100 cycles at 0.5 C(1 C=200 mA·g^(−1)).Our research provides a promising strategy for reducing the resistance between GPE and Li metal anode,and realizes Li metal batteries with enhance electrochemical performance.

关键词： catalyzation polymerization interface resistance interfacial stability Li metal batteries electrochemical performance

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