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Progress in electrode materials for the industrialization of sodium-ion batteries

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Progress in Natural Science:Materials International 2023年第1期33卷 1-7页

作者： Zhaoxin Guo Guangdong Qian Chunying Wang Ge Zhang Ruofan Yin Wei-Di Liu Rui Liu yanan chen School of Materials Science and Engineering Shandong University of Science and Technology School of Materials Science and Engineering Tianjin University Australian Institute for Bioengineering and Nanotechnology The University of Queensland

In recent years, sodium-ion batteries(SIBs) have received renewed attention due to the continued rise in lithium prices. SIBs are promising to replace lithium-ion batteries under various application scenarios, such as large-scale energy storage systems and low-speed electric vehicles. As the core of SIBs, electrode materials are the key factor demining the electrochemical performance. Key drawback, including cycle stability, air stability and energy density, are refraining the development of SIBs off-industrialization. For a systematic understanding on the development of SIBs, in this review, we summarized the progress of SIBs from the industrialization viewpoint,including the fabrication methods suitable for large scale production of electrode materials of SIBs, and the optimization strategies to improve electrochemical performance. Finally, we proposed promising directions for future development of electrode materials for SIBs toward industrialization.

关键词： Sodium-ion batteries Electrode materials Industrialization

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基于六维语义空间的自动驾驶风险评估研究

通信学报 2024年第1期45卷 77-93页

作者：陈亚男李昂吴丹南京邮电大学通信与信息工程学院江苏南京210003 南京邮电大学空天地海通信技术一体化研究院江苏南京210003 陆军工程大学通信工程学院江苏南京210007

针对自动驾驶中风险要素提取不充分、风险场景评估鲁棒性低等问题,提出一种基于六维语义空间的风险评估框架,包括基于六维语义空间的风险要素提取和基于知识图谱的风险场景评估。前者构建六维语义空间并将RGB和红外数据映射其中,利用模... 详细信息

针对自动驾驶中风险要素提取不充分、风险场景评估鲁棒性低等问题,提出一种基于六维语义空间的风险评估框架,包括基于六维语义空间的风险要素提取和基于知识图谱的风险场景评估。前者构建六维语义空间并将RGB和红外数据映射其中,利用模态间的关联提取丰富的数据特征,以获得显在和潜在的风险要素。后者通过语义角色标注和实体融合将风险要素凝练为知识图谱,并联合节点补全和风险等级函数设计知识图谱推理方法,实现准确的风险评估。仿真结果表明,较现有的MSMatch和iSQRT-COV-Net方法,所提方法在准确率、漏/虚警率和处理时间上均有优势。

关键词：六维语义空间知识图谱风险要素风险评估自动驾驶汽车

Whether human-induced activities could change the gradient pattern of coastal land use along the sea-land direction:a case study in Manila Bay,Philippines

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Acta Oceanologica Sinica 2023年第2期42卷 163-174页

作者： Zhi Ding Fenzhen Su yanan chen Ying Liu Xue Feng Wenqiu Hu Fengqin Yan He Li Pujia Yu Xuguang Tang Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station School of Geographical ScienceSouthwest UniversityChongqing400715China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101ChinaState Key Laboratory of Resources and Environmental Information SystemInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China Key Laboratory of Reservoir Aquatic Environment Chongqing Institute of Green and Intelligent TechnologyChinese Academy of SciencesChongqing400714China

Increasing intense human activities have largely changed the coastal landscape and caused many environmental issues.However,whether human-induced activities could change the coastal land use gradient pattern,an important coastal zonal characteristic along the sea-land direction,remains unclear.Manila Bay was selected as the study area in this work.According to the distance of the land use and land cover(LULC)to the coastline,we clustered the typical coastal land use sequence patterns(CLUSPs)along the sea-land direction between 1988 and 2016 in Manila Bay and found the following.(1)Four typical CLUSPs,including the natural CLUSP dominated by forest land and grassland,the agricultural CLUSP dominated by dry farm and paddy field,the urbanised CLUSP dominated by construction land and the fishery CLUSP dominated by fishing farm,were mined in 1988.Three typical CLUSPs(a natural CLUSP,an intermediate CLUSP between the agricultural and urbanised CLUSPs,and a fishery CLUSP)were mined in 2016.(2)Affected by the dominant LULC,these typical CLUSPs showed a regular spatial pattern along the sea-land direction.For example,the typical natural CLUSP showed a landward pattern due to the long distance between the forest land and grassland and the coastline.(3)However,influenced by urban and aquaculture expansion,the land intensification of the CLUSP exhibited an obvious increase and caused the decrease of the CLUSP diversity from 1988 to 2016.The increase in the area of LULC coverage showed no obvious correlation with its distance from the coastline(DFC),but the net increase rate of LULC coverage had a significant negative correlation with the DFC.Therefore,human-induced activities have a large impact on the gradient pattern of coastal land use along the sea-land direction.

关键词： coastal zone land use gradient sea-land human activities Manila Bay

“十多”分析法及其在新兴交叉研究领域的应用——基于方法论与方法的探讨

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科技导报 2024年第10期42卷 74-86页

作者：陈樱花陈雅楠陈安江苏大学管理学院镇江212013 中国科学院科技战略咨询研究院北京100190 中国科学院大学北京100049

随着人类认识能力的提升,与之有关的研究方法及方法论不断处于革新过程中。基础学科是科学研究的源泉,且已形成较为完整的研究方法体系,而针对交叉学科的研究方法体系仍在探索中。在此背景下,基于经典哲学思想及交叉学科研究中的具体问... 详细信息

随着人类认识能力的提升,与之有关的研究方法及方法论不断处于革新过程中。基础学科是科学研究的源泉,且已形成较为完整的研究方法体系,而针对交叉学科的研究方法体系仍在探索中。在此背景下,基于经典哲学思想及交叉学科研究中的具体问题,提出了“十多”分析方法,主要从主客体组合、性质关系、时间类属、空间类属和中介形式5个层面出发,总结了主体、对象、属性、因子、层次、阶段、维度、尺度、渠道、介质10个具体范畴,旨在构建交叉学科研究方法的内在逻辑与本质。同时,根据三维模式统筹与可能性遴选法则,结合具体的交叉学科研究场景,应用“十多”分析方法,实现探索交叉研究问题的方法综合应用或改良创新,进一步服务于未来交叉学科问题的研究与方法体系的建立。

关键词： “十多”分析法科学研究交叉学科方法论

Ultrafastly activated needle coke as electrode material for supercapacitors

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Progress in Natural Science:Materials International 2022年第6期32卷 786-792页

作者： Cuihua Zeng Cunpeng Duan Zhaoxin Guo Zhedong Liu Shuming Dou Qunyao Yuan Peng Liu Jingchao Zhang Jiawei Luo Weidi Liu Jinfeng Zhang yanan chen Wenbin Hu School of Materials Science and Engineering Tianjin University Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE) Shandong University Australian Instiute for Bioengineering and Nanotechnology The University of Queensland

The uniform porous structure makes activated porous carbons(APCs) superior electrode material.Traditionally,APCs are produced by a combination of time-consuming high-temperature heat treatment and activation,with a production time of up to several hours.The produced APCs have relatively low specific surface area(SSA) and porosity.Therefore,the electrochemical performance is poor,which limits its application in high-power energy storage devices.Here,APCs materials are directly synthesized by a high temperature shock(HTS) strategy using needle coke as a precursor.The structure of as-prepared APC is characterized by XRD,SEM and Raman,and electrochemical tests confirmed its good electrochemical performance.In the two-electrode system,the super-capacitor with HTS-APC as the electrode material provides a high energy density of 35 Wh kg-1and a high power density of 875 W kg-1in EMIMBF4ionic liquid.This work is instructive for the rapid synthesis of electrode materials,and also provides guidance for the large-scale application of porous carbon materials.

关键词： Supercapacitors Activated porous carbons (APCs) High temperature shock (HTS) method Cost-effective

Comparison of the protective effects of resveratrol and pterostilbene against intestinal damage and redox imbalance in weanling piglets

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Journal of Animal Science and Biotechnology 2020年第4期11卷 1204-1219页

作者： Hao Zhang yanan chen Yueping chen Shuli Ji Peilu Jia Yue Li Tian Wang College of Animal Science and Technology Nanjing Agricultural UniversityNanjing 210095JiangsuChina Postdoctoral Research Station of Clinical Veterinary Medicine College of Veterinary MedicineNanjing Agricultural UniversityNanjing 210095JiangsuChina Shanghai Key Laboratory of Veterinary Biotechnology Shanghai 200240China Postdoctoral Research Station of Food Science and Engineering College of Food Science and TechnologyNanjing Agricultural UniversityNanjing 210095JiangsuChina Institute of Animal Science Jiangsu Academy of Agricultural SciencesNanjing 210014China.

Background: Evidence indicates that early weaning predisposes piglets to intestinal oxidative stress and increases the risk of intestinal dysfunction;however, there are minimal satisfactory treatment strategies for these conditions.This study investigated the potential of resveratrol and its analog, pterostilbene, as antioxidant protectants for regulating intestinal morphology, barrier function, and redox status among weanling piglets.Methods: A total of 144 piglets were selected at 21 days of age and randomly allocated into one of four treatment groups, each of which included six replicates. Piglets in a sow-reared control group were suckling normally between ages 21 and 28 days, while those in weaned groups were fed a basal diet, supplemented with either 300 mg/kg of resveratrol or with 300 mg/kg of pterostilbene. Parameters associated with intestinal injury and redox status were analyzed at the end of the feeding trial.Results: Early weaning disrupted the intestinal function of young piglets, with evidence of increased diamine oxidase activity and D-lactate content in the plasma, shorter villi, an imbalance between cell proliferation and apoptosis, an impaired antioxidant defense system, and severe oxidative damage in the jejunum relative to suckling piglets. Feeding piglets with a resveratrol-supplemented diet partially increased villus height(P = 0.056) and tended to diminish apoptotic cell numbers(P = 0.084) in the jejunum compared with those fed a basal diet. Similarly, these beneficial effects were observed in the pterostilbene-fed piglets. Pterostilbene improved the feed efficiency of weanling piglets between the ages of 21 and 28 days;it also resulted in diminished plasma diamine oxidase activity and D-lactate content relative to untreated weaned piglets(P < 0.05). Notably, pterostilbene restored jejunal antioxidant capacity, an effect that was nearly absent in the resveratrol-fed piglets. Pterostilbene reduced the malondialdehyde and 8-hydroxy-2′-deoxyguanosine contents of jejunal mucosa possibly throu

关键词： Intestinal injury Oxidative damage Piglet Pterostilbene Resveratrol Weaning stress

Resveratrol and its derivative pterostilbene ameliorate intestine injury in intrauterine growth-retarded weanling piglets by modulating redox status and gut microbiota

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Journal of Animal Science and Biotechnology 2021年第4期12卷 1530-1542页

作者： yanan chen Hao Zhang Yueping chen Peilu Jia Shuli Ji Yuying Zhang Tian Wang College of Animal Science and Technology Nanjing Agricultural UniversityNo.1 Weigang StreetNanjingJiangsu 210095People’s Republic of China

Background:Intestinal disorder is an important factor contributing to growth lag and high rates of morbidity and mortality of piglets with intrauterine growth retardation(IUGR).Resveratrol(RSV)and its derivative pterostilbene(PT)are natural stilbenes possessing various bioactivities,such as antioxidative and anti-inflammatory effects.This study compared the protective potential of RSV and PT on the intestinal redox status and gut microbiota in weanling piglets with IUGR.Methods:Eighteen male piglets of normal body weight(NBW)and 54 same-sex IUGR piglets were chosen according to their birth and weaning weights.The NBW piglets accepted a basal diet,while the IUGR piglets were allotted to one of three groups according to their body weight at weaning and received a basal diet,an RSV-supplemented diet(300 mg/kg),or a PT-supplemented diet(300 mg/kg),respectively.Results:Compared with IUGR piglets,both RSV and PT improved the IUGR-associated decrease in jejunal villus height and increases in plasma diamine oxidase activity and D-lactate level and jejunal apoptosis of piglets(P<0.05).Administering RSV and PT also enhanced jejunal superoxide dismutase activity and the mRNA and protein expression of superoxide dismutase 2 of IUGR piglets by promoting nuclear factor erythroid 2-related factor 2(Nrf2)nuclear translocation(P<0.05).Comparatively,PT was more effective than RSV in elevating the villus height/crypt depth ratio and occludin mRNA and protein levels in the jejunum of IUGR piglets(P<0.05).PT was also superior to RSV in increasing Nrf2 nuclear translocation and inhibiting malondialdehyde accumulation in the jejunum of IUGR piglets(P<0.05).Additionally,RSV modulated the composition of cecal microbiota of IUGR piglets,as evidenced by increasing the prevalence of the phylum Bacteroidetes and the genera Prevotella,Faecalibacterium,and Parabacteroides and inhibiting the growth of the phylum Proteobacteria and its genera Escherichia and Actinobacillus(P<0.05).Moreover,RSV significantly increased the butyrate concentration i

关键词： Gut microbiota Intestinal injury Intrauterine growth retardation Oxidative stress Piglets Pterostilbene Resveratrol

High-temperature ferromagnetic metallic phase in LaMnO_(3)/Sr_(3)Al_(2)O_(6)heterostructure

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Journal of Materials Science & Technology 2022年第24期119卷 69-74页

作者： Di Wang Bin He Jinrui Guo Qixiang Wang Chaoqun Shi Yue Han Hong Fang Jie Wang Nana Zhang Peng Zhang yanan chen Changwen Zhang Weiming Lü Shishen Yan Spintronics Institute School of Physics and TechnologyUniversity of JinanJinan250022China Condensed Matter Science and Technology Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin150080China School of Physics Shandong UniversityJinan250100China

To achieve a flexible single-crystal multifunctional membrane,the freestanding process of a rigid epitaxial transition metal oxide thin film via a buffered water-dissolution sacrificial layer has attracted reasonable attentions.Owing to the difference in chemical potential,specific element affinity,and lattice constant between the target membrane and the sacrificial layer,the freestanding process may cause an indelible change of physics property once the target thin film is sensitive to the above factors.Here,the heterostructures composed of the generally adopted sacrificial layer Sr_(3)Al_(2)O_(6)(SAO)and LaMnO_(3)(LMO)have been systematically investigated.The electrical and magnetic properties of LMO show extreme sensitivity to the thickness of SAO(tSAO).Then we have also found that LMO/SAO heterostructures can exhibit the coexistence of two ferromagnetic phases,the significantly enhanced Curie temperature~342 K,and the large magnetoresistance-23.3%at 300 K,which is similar to the optimal-doped manganite such as La_(2/3)Sr_(1/3)MnO_(3).X-ray diffraction results show that continuously tunable strain from out-of-plane tension to relaxation and then to compression can be generated by adjusting tSAO.This strain can stabilize the migrated oxygen from LMO to SAO,which is induced by the large oxygen affinity difference between Bsite Mn and Al.It is believed that these unexpected electrical/magnetic phenomena are originated from the combined effects of interfacial element diffusion and strain.Our study provides a strategy for designing new magnetic phases,and a reference for the fundamental understanding of strongly correlated transition metal oxide systems in the freestanding process.

关键词： Sr_(3)Al_(2)O_(6) LaMnO_(3) Oxygen affinity Oxygen ions migration Strain effects

Identification of reversible insertion-type lithium storage reaction of manganese oxide with long cycle lifespan

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Journal of Energy Chemistry 2020年第7期29卷 144-151,I0005页

作者： Yuxuan Zhang Fang Lian Jianhao Lu Laijun Ma Ning chen yanan chen Dingguo Xia School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing 100871China

Recently,MnO2 has gained attention as an electrode material because of its very high theoretical capacity and abundant availability.However,the very high volumetric change caused by its conversion-type reaction results in bad reversibility of charge-discharge.In this study,δ-MnO2 of thickness 8 nm anchored on the surface of carbon nanotubes(CNT)by Mn-O-C chemical bonding is synthesized via a facile hydrothermal method.Numerous ex-situ characterizations of the lithium storage process were performed.Furthermore,density functional theory(DFT)calculations indicated thatδ-MnO2(012)thermodynamically prefers bonding with CNTs.Moreover,the interfacial interaction reinforces the connection of Mn-O and reduces the bond strength of Li-O in lithiated MnO2,which could facilitate an intercalation-type lithium storage reaction.Consequently,the as-synthesizedδ-MnO2 retains an excellent reversible capacity of 577.5 mAh g-1 in 1000 cycles at a high rate of 2 A g-1 between 0.1 V and 3.0 V.The results of this study demonstrate the possibility of employing the cost-effective transition metal oxides as intercalation lithium storage dominant electrodes for advanced rechargeable batteries.

关键词： Rechargeable batteries Manganese dioxide Carbon nanotubes Intercalation reaction Lithium storage process