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Net zero emission goals demand worldwide cooperation

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National Science Review 2023年第11期10卷 93-95页

作者： Shi Xue Dou wei-hong lai Chris Cook Institute of Energy Materials Science University of Shanghai for Science and Technology Institute for Superconducting and Electronic Materials University of Wollongong Faculty of Engineering and Information Sciences University of Wollongong

The serious threat of climate change has become a reality of daily life all over the world. There is no priority facing humans at present more urgent than climate change. The goal of achieving net zero emissions (NZEs) within a time frame short enough to avoid catastrophic changes can only be accomplished through worldwide cooperation.

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Oxygen redox chemistry in lithium-rich cathode materials for Li-ion batteries:Understanding from atomic structure to nano-engineering

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Nano Materials Science 2022年第4期4卷 322-338页

作者： Majid Farahmandjou Shuoqing Zhao wei-hong lai Bing Sun Peter.H.L.Notten Guoxiu Wang Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia Department of Chemical Engineering and Chemistry Eindhoven University of Technology5600MBEindhoventhe Netherlands Fundamental Electrochemistry(IEK9) Forschungszentrum JülichD-52425JülichGermany

Lithium-rich oxide compounds have been recognized as promising cathode materials for high performance Li-ion batteries,owing to their high specific ***,it remains a great challenge to achieve the fully reversible anionic redox reactions to realize high capacity,high stability,and low voltage hysteresis for lithiumrich cathode ***,it is critically important to comprehensively understand and control the anionic redox chemistry of lithium-rich cathode materials,including atomic structure design,and nano-scale materials engineering ***,we summarize the recent research progress of lithium-rich cathode materials with a focus on redox ***,we highlight the oxygen-based redox reactions in lithium-rich metal oxides,with critical views of designing next generation oxygen redox lithium cathode ***,we purposed the most promising strategies for improving the performances of lithium-rich cathode materials with a technology-spectrum from the atomic scale to nano-scale.

关键词： Oxygen redox chemistry Lithium-rich cathode Li-ion batteries Atomic structure Nano-engineering

Understanding Sulfur Redox Mechanisms in Different Electrolytes for Room-Temperature Na-S Batteries

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Nano-Micro Letters 2021年第8期13卷 107-120页

作者： Hanwen Liu wei-hong lai Qiuran Yang Yaojie Lei Can Wu Nana Wang Yun-Xiao Wang Shu-Lei Chou Hua Kun Liu Shi Xue Dou Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2500Australia

This work reports influence of two different electrolytes,carbonate ester and ether electrolytes,on the sulfur redox reactions in room-temperature Na-S *** sulfur cathodes with different S loading ratio and status are investigated.A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio(72%S).In contrast,a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio(44%S).In carbonate ester electrolyte,only the sulfur trapped in porous structures is active via‘solid-solid’behavior during *** S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester *** improve the capacity of the sulfur-rich cathode,ether electrolyte with NaNO_(3) additive is explored to realize a‘solid-liquid’sulfur redox process and confine the shuttle effect of the dissolved *** a result,the sulfur-rich cathode achieved high reversible capacity(483 mAh g^(−1)),corresponding to a specific energy of 362 Wh kg^(−1) after 200 cycles,shedding light on the use of ether electrolyte for high-loading sulfur cathode.

关键词： Room-temperature sodium-sulfur batteries Carbonate ester electrolyte Ether electrolyte Sulfur cathode Sulfur redox reactions

Manipulating metal-sulfur interactions for achieving high-performance S cathodes for room temperature Li/Na-sulfur batteries

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Carbon Energy 2021年第2期3卷 253-270页

作者： Ying-Ying Dai Chun-Mei Xu Xiao-Hao Liu Xiang-Xi He Zhuo Yang wei-hong lai Li Li Yun Qiao Shu-Lei Chou School of Environmental and Chemical Engineering Shanghai UniversityShanghaiChina Institute for Superconducting&Electronic Materials Innovation CampusUniversity of WollongongWollongongNew South WalesAustralia

Rechargeable lithium/sodium-sulfur batteries working at room temperature(RT-Li/S,RT-Na/S)appear to be a promising energy storage system in terms of high theoretical energy density,low cost,and abundant resources in *** are,thus,considered as highly attractive candidates for future application in energy storage ***,the solubility of sulfur species,sluggish kinetics of lithium/sodium sulfide compounds,and high reactivity of metallic anodes render these cells *** a consequence,metal-sulfur batteries present low reversible capacity and quick capacity loss,which hinder their practical *** to address these issues regarding S cathodes are critical to the increase of their performance and our fundamental understanding of RT-Li/S and RT-Na/S battery ***-sulfur interactions,recently,have attracted considerable attention,and there have been new insights on pathways to high‐performance RT-Li/Na sulfur batteries,due to the following factors:(1)deliberate construction of metal-sulfur interactions can enable a leap in capacity;(2)metal-sulfur interactions can confine S species,as well as sodium sulfide compounds,to stop shuttle effects;(3)traces of metal species can help to encapsulate a high loading mass of sulfur with high‐cost efficiency;and(4)metal components make electrodes more *** this review,we highlight the latest progress in sulfide immobilization via constructing metal bonding between various metals and S ***,we summarize the storage mechanisms of Li/Na as well as the metal-sulfur interaction ***,the current challenges and future remedies in terms of intact confinement and optimization of the electrochemical performance of RT-Li/Na sulfur systems are discussed in this review.

关键词： electrochemical mechanism metal-sulfur interactions room temperature Li/Na sulfur batteries S-confinement strategy

Lithium-Ion Charged Polymer Channels Flattening Lithium Metal Anode

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Nano-Micro Letters 2024年第4期16卷 379-393页

作者： Haofan Duan Yu You Gang Wang Xiangze Ou Jin Wen Qiao Huang Pengbo Lyu Yaru Liang Qingyu Li Jianyu Huang Yun‑Xiao Wang Hua‑Kun Liu Shi Xue Dou wei‑hong lai Hunan Provincial Key Laboratory of Thin Film Materials and Devices School of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105People’s Republic of China Guangxi Key Laboratory of Low Carbon Energy Materials School of Chemical and Pharmaceutical ScienceGuangxi Normal UniversityGuilin 541004People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2500Australia Institute of Energy Materials Science University of Shanghai for Science and TechnologyShanghai 200093People’s Republic of China

The concentration difference in the near-surface region of lithium metal is the main cause of lithium dendrite *** this issue will be key to achieving high-performance lithium metal batteries(LMBs).Herein,we construct a lithium nitrate(LiNO_(3))-implanted electroactiveβphase polyvinylidene fluoride-co-hexafluoropropylene(PVDF-HFP)crystalline polymorph layer(PHL).The electronegatively charged polymer chains attain lithium ions on the surface to form lithium-ion charged *** channels act as reservoirs to sustainably release Li ions to recompense the ionic flux of electrolytes,decreasing the growth of lithium *** stretched molecular channels can also accelerate the transport of Li *** combined effects enable a high Coulombic efficiency of 97.0%for 250 cycles in lithium(Li)||copper(Cu)cell and a stable symmetric plating/stripping behavior over 2000 h at 3 mA cm^(-2)with ultrahigh Li utilization of 50%.Furthermore,the full cell coupled with PHL-Cu@Li anode and Li Fe PO_(4) cathode exhibits long-term cycle stability with high-capacity retention of 95.9%after 900 ***,the full cell paired with LiNi_(0.87)Co_(0.1)Mn_(0.03)O_(2)maintains a discharge capacity of 170.0 mAh g^(-1)with a capacity retention of 84.3%after 100 cycles even under harsh condition of ultralow N/P ratio of *** facile strategy will widen the potential application of LiNO_(3)in ester-based electrolyte for practical high-voltage LMBs.

关键词： Polymer ionic channel Li metal batteries Artificial protective layer Uniform Li deposition Electrochemical performances

Hepatitis G virus infection in patients with chronic non-A-E hepatitis

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World Journal of Gastroenterology 1997年第3期3卷 15-18页

作者： CHANG Jin hong, wei lai, DU Shao Cai, WANG Hao, SUN Yan and TAO Qi Min

AIM To elucidate the role of hepatitis G virus (HGV) infection in chronic non A E hepatitis and sequence the partial NS5 genome of HGV in the serum of a Chinese patient with chronic non A E hepatitis. METHODS Total nucleic acids were extracted from the sera of patients with chronic non A E hepatitis and subjected to reverse transcriptase nested polymerase chain reaction (RT nested PCR) using primers from the putative NS5 region of HGV genome. 994bp cDNA was obtained from the positive serum and was directly sequenced using dideoxy mediated chain termination method after purified with electrophoresis of polyacrylamide gels. RESULTS HGV RNA was detected in 1 of 35 patients with chronic non A E hepatitis. Compared with the 2 American HGV isolates (PNF2161 and R10291), the homology of HGV NS5 gene of this Beijing isolate (HG G) was 88 0% and 89 2% respectively, while compared with West African isolate (GBV C), it was 93 5%. This patient had persistent increase of ALT but soon became normal after interferon therapy with persistent positive HGV RNA. CONCLUSION HGV is one of the causes of chronic non A E hepatitis, however, it may not be a very important cause. The nucleotide sequence of partial NS5 gene of HG G is highly homologous with the West Africa isolate.

关键词： hepatitis G non A E hepatitis genes, viral RNA, viral DNA, viral polymerase chain reaction genome, viral

Understanding Sulfur Redox Mechanisms in Di erent Electrolytes for Room-Temperature Na–S Batteries

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Nano-Micro Letters 2021年第8期13卷 113-126页

This work reports influence of two di erent electrolytes, carbonate ester and ether electrolytes, on the sulfur redox reactions in room-temperature Na–S batteries. Two sulfur cathodes with di erent S loading ratio and status are investigated. A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio（72% S）. In contrast, a confined sulfur sample can encapsulate S into the pores of the carbon host with a low loading ratio（44% S）. In carbonate ester electrolyte, only the sulfur trapped in porous structures is active via ‘solid–solid' behavior during cycling. The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents. To improve the capacity of the sulfurrich cathode, ether electrolyte with NaNO3additive is explored to realize a ‘solid–liquid' sulfur redox process and confine the shuttle e ect of the dissolved polysulfides. As a result, the sulfur-rich cathode achieved high reversible capacity(483 mAh g-1), corresponding to a specific energy of 362 Wh kg-1after 200 cycles, shedding light on the use of ether electrolyte for high-loading sulfur cathode.

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下承式斜靠钢箱系杆拱桥施工阶段模拟分析

智能城市 2023年第1期9卷 26-29页

作者：魏宏来肥西县住房和城乡建设局安徽合肥231200

下承式斜靠钢箱系杆拱桥作为市政桥梁中较为常见的桥梁,具有一种复杂的三维空间结构——高次超静定,为确保施工安全可靠,需依靠有限元软件对结构的施工阶段进行分析。文章以引江济淮工程创新大道桥施工为背景,采用有限元模型对结构强度... 详细信息

下承式斜靠钢箱系杆拱桥作为市政桥梁中较为常见的桥梁,具有一种复杂的三维空间结构——高次超静定,为确保施工安全可靠,需依靠有限元软件对结构的施工阶段进行分析。文章以引江济淮工程创新大道桥施工为背景,采用有限元模型对结构强度、刚度和稳定性进行验算分析,在施工过程中,主桥多次边界条件的变化,不能依照成桥吊杆力依次张拉吊杆,按照正装-倒退分析结合有限元模拟的方法调整吊杆索力,并与目标成桥索力和实测索力结果进行比较,结果表明,成桥索力与实测索力相差较小。

关键词：系杆拱桥施工阶段吊杆索力有限元模拟

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疫情对内蒙古大学生就业的影响与对策研究

阴山学刊 2021年第4期34卷 109-112页

作者：魏来宏周玮白蕾内蒙古自治区高等院校毕业生就业指导中心内蒙古呼和浩特010010

新冠疫情期间,内蒙古高校毕业生就业存在经济发展增速降缓导致岗位供应不足、高校人才培养模式滞后、高校毕业生就业价值观念保守等问题。应采取多措并举援企稳岗,尽早启动政策性岗位招录工作,加大就业岗位开发力度等措施。

关键词：疫情内蒙古大学生就业