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Synergistic coupling among Mg_(2)B_(2)O_(5),polycarbonate and N,Ndimethylformamide enhances the electrochemical performance of PVDF-HFP-based solid electrolyte

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Journal of Energy Chemistry 2024年第7期94卷 158-168页

作者： Yutong Jing Qiang Lv Yujia Chen Bo Wang bochen wu Cheng Li Shengbo Yang Zhipeng He Dianlong Wang Huakun Liu Shixue Dou MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Institute of Energy Material Science University of Shanghai for Science and TechnologyShanghai 200093China Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW 2500Australia

Polymer solid electrolytes(SPEs)based on the[solvate-Li+]complex structure have promising prospects in lithium metal batteries(LMBs)due to their unique ion transport ***,the solvation structure may compromise the mechanical performance and safety,hindering practical application of *** this work,a composite solid electrolyte(CSE)is designed through the organic-inorganic syner-gistic interaction among N,N-dimethylformamide(DMF),polycarbonate(PC),and Mg_(2)B_(2)O_(5) in poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP).Flame-retardant Mg_(2)B_(2)O_(5) nanowires provide non-flammability to the prepared CSEs,and the addition of PC improves the dispersion of Mg_(2)B_(2)O_(5) ***,the organic-inorganic synergistic action of PC plasticizer and Mg_(2)B_(2)O_(5) nanowires pro-motes the dissociation degree of LiTFSI and reduces the crystallinity of PVDF-HFP,enabling rapid Li ion ***,Raman spectroscopy and DFT calculations confirm the coordination between Mg atoms in Mg_(2)B_(2)O_(5) and N atoms in DMF,which exhibits Lewis base-like behavior attacking adjacent C-F and C-H bonds in PVDF-HFP while inducing dehydrofluorination of *** on the syner-gistic coupling of Mg_(2)B_(2)O_(5),PC,and DMF in the PVDF-HFP matrix,the prepared CSE exhibits superior ion conductivity(9.78×10^(-4) s cm^(-1)).The assembled Li symmetric cells cycle stably for 3900 h at a current density of 0.1 mA cm^(-2) without short *** LFP||Li cells assembled with PDL-Mg_(2)B_(2)O_(5)/PC CSEs show excellent rate capability and cycling performance,with a capacity retention of 83.3%after 1000 cycles at 0.5 *** work provides a novel approach for the practical application of organic-inorganic Synergistic CSEs in LMBs.

关键词： Composite solid electrolytes Safe Li metal batteries Synergistic coupling effect Poly(vinylidene fluoride-co-hexafluoropro pylene)

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Recent advances in cathodes for all-solid-state lithium-sulfur batteries

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Chinese Chemical Letters 2023年第7期34卷 58-69页

作者： Shengbo Yang Bo Wang Qiang Lv Nan Zhang Zekun Zhang Yutong Jing Jinbo Li Rui Chen bochen wu Pengfei Xu Dianlong Wang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

Lithium-sulfur(Li-S)batteries have been regarded as the candidate for the next-generation energy storage system due to the high theoretical specific capacity(1675 m Ah/g), energy density(2600 Wh/kg)and the abundance of elemental sulfur, but the application of Li-S batteries is impeded by a series of problems. Recently, all-solid-state Li-S batteries(ASSLSBs) have drawn great attention because many drawbacks such as safety issues caused by metallic lithium anodes and organic liquid electrolytes can be overcome through the use of solid-state electrolytes(SEs). However, not only the problems brought by sulfur cathodes still exist, but more trouble arouses from the interfaces between SEs and cathodes, hampering the practical application of ASSLSBs. Therefore, in order to deal with the problems, enormous endeavors have been done on ASSLSB cathodes during the past few decades, including engineering of cathode active materials, cathode host materials, cathode binder materials and cathode structures. In this review, the electrochemical mechanism and existing problems of ASSLSBs are briefly introduced. Subsequently, the strategies for developing cathode materials and designing cathode structures are presented. Then there follows a brief discussion of SE problems and expectations, and finally, the challenges and perspectives of ASSLSBs are summarized.

关键词： All-solid-state Li-S battery Cathode active material Cathode host material Cathode structure Solid-state electrolyte

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Bifunctional flame retardant solid-state electrolyte toward safe Li metal batteries

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能源化学:英文版 2023年第6期81卷 613-622,I0014页

作者： Qiang Lv Yajie Song Bo Wang Shangjie Wang bochen wu Yutong Jing Huaizheng Ren Shengbo Yang Lei Wang Lihui Xiao Dianlong Wang Huakun Liu Shixue Dou MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina Institute for Superconducting&Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW 2500Australia Institute of Energy Material Science University of Shanghai for Science and TechnologyShanghai 200093China

Solid polymer electrolytes(SPEs)are one of the most promising alternatives to flammable liquid electrolytes for building safe Li metal ***,the poor ionic conductivity at room temperature(RT)and low resistance to Li dendrites seriously hinder the commercialization of ***,we design a bifunctional flame retardant SPE by combining hydroxyapatite(HAP)nanomaterials with Nmethyl pyrrolidone(NMP)in the PVDF-HFP *** addition of HAP generates a hydrogen bond network with the PVDF-HFP matrix and cooperates with NMP to facilitate the dissociation of Li TFSI in the PVDF-HFP ***,the prepared SPE demonstrates superior ionic conductivity at RT,excellent fireproof properties,and strong resistance to Li *** assembled Li symmetric cell with prepared SPE exhibits a stable cycling performance of over 1200 h at 0.2 m A cm^(-2),and the solid-state LiFePO_4||Li cell shows excellent capacity retention of 85.3%over 600 cycles at 0.5 C.

关键词： Solid polymer electrolytes Safe Li metal batteries Li dendrites Hydroxyapatite N-methyl pyrrolidone PVDF-HFP Fireproof property

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Microstructure evolution from silicon core to surface in electronic-grade polycrystalline silicon

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Journal of Advanced Dielectrics 2024年第3期14卷 18-26页

作者： Jinyue Peng Yuxuan Yang Yang Zhang Xinlu Xue bochen Lu Rong Qin Haijun wu State Key Laboratory for Mechanical Behavior of Materials Electronic Materials Research Laboratory(Key Lab of Education Ministry)and School of Electronic and Information Engineering Xi’an Jiaotong University 710049 Xi’anChina Qinghai Xince Technology Co. Ltd.Huanghe Hydropower Development Co.Ltd.810007 XiningChina Instrumental Analysis Center Xi’an Jiaotong UniversityXi’anChina

Large-size electronic-grade polycrystalline silicon is an important material in the semiconductor industry with broad application ***,electronic-grade polycrystalline silicon has extremely high requirements for production technology and currently faces challenges such as carbon impurity breakdown,microstructure and composition nonuniformity and a lack of methods for preparing large-size mirror-like polycrystalline silicon *** paper innovatively uses physical methods such as wire cutting,mechanical grinding and ion thinning polishing to prepare large-size polycrystalline silicon samples that are clean,smooth,free from wear and have clear crystal *** material was characterized at both macroscopic and microscopic levels using metallographic microscopy,scanning electron microscopy(SEM)with backscattered electron diffraction(EBSD)techniques and scanning transmission electron microscopy(STEM).The crystal structure changes from single crystal silicon core to the surface of the bulk in the large-size polycrystalline silicon samples were revealed,providing a technical basis for optimizing and improving production processes.

关键词： Polysilicon silicon core matrix interface surface metallographic microscopy EBSD

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Microstructure of electronic-grade polycrystalline silicon core-matrix interface

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Journal of Advanced Dielectrics 2024年第3期14卷 11-17页

作者： bochen Lu Yuxuan Yang Yang Zhang Rong Qin Xinlu Xue Jinyue Peng Haijun wu State Key Laboratory for Mechanical Behavior of Materials Electronic Materials Research Laboratory(Key Lab of Education Ministry)and School of Electronic and Information Engineering Xi’an Jiaotong University 710049Xi’anP.R.China Qinghai Xince Technology Co. Ltd.Huanghe Hydropower Development Co.Ltd.810007XiningP.R.China Instrumental Analysis Center Xi’an Jiaotong University Xi’anP.R.China

This paper focuses on the problems encountered in the production process of electronic-grade polycrystalline *** points out that the characterization of electronic-grade polycrystalline silicon is mainly concentrated at the macroscopic scale,with relatively less research at the mesoscopic and microscopic ***,we utilize the method of physical polishing to obtain polysilicon characterization samples and then the paper utilizes metallographic microscopy,scanning electron microscopy-electron backscatter diffraction technology,and aberration-corrected transmission electron microscopy technology to observe and characterize the interface region between silicon core and matrix in the deposition process of electronic-grade polycrystalline silicon,providing a full-scale characterization of the interface morphology,grain structure,and orientation distribution from macro to ***,the paper illustrates the current uncertainties regarding polycrystalline silicon.

关键词： Polysilicon silicon core matrix interface metallographic microscopy EBSD

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A review of methods for mitigating ionospheric artifacts in differential SAR interferometry

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Geodesy and Geodynamics 2022年第2期13卷 160-169页

作者： bochen Zhang wu Zhu Xiaoli Ding Chisheng Wang Songbo wu Qin Zhang MNR Key Laboratory for Geo-Environmental Monitoring of Great Bay Area&Guangdong Key Laboratory of Urban Informatics&Shenzhen Key Laboratory of Spatial Smart Sensing and Services Shenzhen University518060 ShenzhenChina College of Civil and Transportation Engineering Shenzhen University518060 ShenzhenChina School of Geology Engineering and Geomatics Chang'an UniversityXi'anShaanxiChina Department of Land Surveying and Geo-Informatics The Hong Kong Polytechnic UniversityKowloonHong KongChina School of Architecture&Urban Planning Shenzhen University518060 ShenzhenChina

Interferometric synthetic aperture radar(InSAR)has been widely used to measure ground displacements related to geophysical and anthropic activities over the past three *** SAR systems use microwave signals that interact with the ionosphere when they travel through it during the imaging *** this context,ionospheric variations can significantly contaminate SAR imagery,which in turn affects spaceborne InSAR *** bias also leads to a decrease in the coherence and accuracy of InSAR measurements,especially for the low-frequency SAR *** this paper,we give an overview of the latest methods for mitigating the ionospheric contributions in InSAR,including Faraday rotation method,azimuth shift method,and range split-spectrum method,and only focus on the single pair of InSAR *** current challenges and future perspectives are outlined at the end of this paper.

关键词： InSAR Ionospheric artifacts Azimuth pixel shift Faraday rotation Range split-spectrum

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疏肝解郁法治疗冠心病合并抑郁的Meta分析及GRADE评价

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中西医结合心脑血管病杂志 2024年第9期22卷 1547-1554页

作者：吴洋王宇李柏辰王保福王显北京中医药大学东直门医院北京100029 河北医科大学第一医院

目的:评价疏肝解郁法治疗冠心病合并抑郁的有效性和安全性。方法:计算机检索中文数据库中国生物医学文献服务系统、维普数据库、中国期刊全文数据库、万方数据库及英文数据库PubMed、the Cochrane Library、Web of Science,检索时限为... 详细信息

目的:评价疏肝解郁法治疗冠心病合并抑郁的有效性和安全性。方法:计算机检索中文数据库中国生物医学文献服务系统、维普数据库、中国期刊全文数据库、万方数据库及英文数据库PubMed、the Cochrane Library、Web of Science,检索时限为自建库至2022年10月。对纳入的结局指标中医证候积分、有效率(心绞痛有效率、心电图有效率、抑郁有效率)、抑郁量表评分[抑郁症自评量表(SDS)、汉密尔顿抑郁量表(HAMD)]及C-反应蛋白(CRP)进行Meta分析,对中医证候积分、有效率、抑郁量表评分进行证据质量评价。结果:最终纳入符合标准的文献22篇,涉及病人1828例。与西药常规治疗相比,联用疏肝解郁中药可降低病人的中医证候积分[SMD=-0.89,95%CI(-1.20,-0.58),P<0.00001],提高心绞痛有效率[RR=1.29,95%CI(1.23,1.36),P<0.00001]和心电图有效率[RR=1.21,95%CI(1.08,1.36),P=0.001],改善抑郁有效率[RR=1.50,95%CI(1.33,1.71),P<0.00001],降低HAMD评分[SMD=-2.17,95%CI(-2.90,-1.44),P<0.00001]、SDS评分[SMD=-1.73,95%CI(-2.33,-1.13),P<0.00001]及CRP水平[SMD=-1.81,95%CI(-2.06,-1.55),P<0.00001],且无明显的药物不良反应。GRADE分级结果显示,中医证候积分的证据质量为极低级,心绞痛有效率和抑郁有效率为中级,心电图有效率、HAMD评分、SDS评分为低级。结论:现有证据表明,疏肝解郁法可有效改善冠心病合并抑郁病人的临床症状,且安全性较高。

关键词：冠心病抑郁疏肝解郁 Meta分析

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新型冠状病毒感染急性咳嗽患者的中医证素分布特点研究

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中医药导报 2024年第8期30卷 137-143页

作者：樊佳慧唐雪春吴友强李柏辰北京中医药大学东直门医院北京100700

目的:探讨新型冠状病毒感染急性咳嗽患者的中医证素分布特点。方法:采用临床流行病学研究方法,选取2022年12月至2023年12月于北京中医药大学东直门医院门诊诊断为新型冠状病毒感染急性咳嗽的患者,采用证素辨证方法研究其病位、病性证素... 详细信息

目的:探讨新型冠状病毒感染急性咳嗽患者的中医证素分布特点。方法:采用临床流行病学研究方法,选取2022年12月至2023年12月于北京中医药大学东直门医院门诊诊断为新型冠状病毒感染急性咳嗽的患者,采用证素辨证方法研究其病位、病性证素,并进行关联分析及聚类分析。结果:共收集有效病例130例,共归纳出病位证素9个,病位证素按出现频率依次为肺、表、肝、肾、脾、心神、半表半里、胃、筋骨,其中肺出现频率为100%,提示本病核心病位为肺,其次为表。病性证素16个,按出现频率依次为痰、阴虚、气虚、热、外风、阳虚、湿、寒、血虚、气滞、饮、阳亢、不固、燥、毒、血热,其中痰、阴虚、气虚为主要病性证素。关联分析后得到支持度和置信度最高的组合是肺-表,其次为肺-痰、肺-阴虚。聚类分析后可得到4个聚类组:气滞、肝、外风、寒;湿、热、阴虚;阳虚、气虚、血虚;表、肺、痰。结论:新型冠状病毒感染急性咳嗽的主要病位为肺、表;主要病性为痰、阴虚。痰是新型冠状病毒感染急性咳嗽最主要的病理因素,病机尤以虚(气阴两虚)与痰(痰浊阻络)最为关键,多易由实转虚,虚实夹杂,治疗应虚与痰同治,同时需及时补益肺气、肺阴。

关键词：新型冠状病毒感染急性咳嗽中医证素聚类分析关联分析

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Effects of Bacillus coagulans supplementation on the growth performance and gut health of broiler chickens with Clostridium perfringens-induced necrotic enteritis

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Journal of Animal Science and Biotechnology 2018年第2期9卷 407-420页

作者： Yuanyuan wu Yujing Shao bochen Song Wenrui Zhen Zhong Wang Yuming Guo Muhammad Suhaib Shahid Wei Nie State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University College of Biology China Agricultural University

Background: The poultry industry is in need of effective antibiotic alternatives to control outbreaks of necrotic enteritis(NE) due to Clostridium ***: This study was conducted to investigate the effects of feeding Bacil us coagulans on the growth performance and gut health of broiler chickens with C. perfringens-induced NE. Two hundred and forty 1-day-old broiler chicks were randomly assigned to a 2 × 2 factorial arrangement with two dietary B. coagulans levels(0 or 4 × 109 CFU/kg of diet) and two disease chal enge statuses(control or NE chal enged).Results: NE-induced reduction in body weight gain was relieved by the addition of B. coagulans into broiler diets compared with the NE-infected birds. NE infection damaged intestinal morphological structure, promoted intestinal *** growth and liver invasion, and enhanced anti-C. perfringens specific sI gA concentrations in the gut and specific IgG levels in serum compared with the uninfected birds. NE infection significantly(P < 0.05) decreased mucin-2(at 14 d post-infection(DPI), tol-like receptor 2(TLR2, at 7 and 14 DPI), TLR4(at 7 and 14 DPI), tumor necrosis factor super family15(TNFSF15, at 7 and 14 DPI), lysozyme(LYZ, at 14 DPI) and fowlicidin-2(at 7 and 14 DPI) mR NA levels, whereas it dramatical y(P = 0.001) increased IFN-γ mR NA levels at 7 DPI. However, chal enged birds fed diets supplemented with *** showed a significant(P < 0.01) decrease in gut lesion scores, decreased C. perfringens numbers in the cecum and liver, and an increase in fowlicidin-2 mR NA levels in compared with the uninfected birds. In addition, compared with the non-supplemented group, dietary inclusion of B. coagulans improved intestinal barrier structure, further increased specific sI gA levels and alkaline phosphatase(IAP) activity in the jejunum, enhanced the expression of jejunum lysozyme mR NA, and inhibited the growth, colonization, and invasion of C. perfringens; in contrast, it reduced serum-specific

关键词： Bacillus coagulans Broiler chickens Clostridium perfringens Gut health

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Effect of co-existent components in CO2 supercritical fluid extract of Angelica Sinensis Radix on metabolism of Z-ligustilide after oral administration in rats

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Journal of Traditional Chinese Medical Sciences 2014年第2期1卷 126-134页

作者： bochen Zhao Qing Zhang Hongmei Lin Qingguo Ru Qian Kang Hui Li Yewen Zhang Qing wu Beijing University of Chinese Medicine Beijing 100029China

Objective:To establish a basis for Angelica Sinensis Radix(ASR)as a dietary supplement for colorectal cancer chemoprevention,the effect of co-existent components in supercritical fluid extract(SFE)of ASR on the pharmacokinetics of Z-ligustilide after oral administration was investigated in vitro and in ***:Incubation in gastrointestinal contents and incubation in rat liver tissue homogenates post-mitochondrial supernatant(PMS)experiments were used to study changes in the levels of Z-ligustilide in ***:Within 4 hours,the level of Z-ligustilide in SFE declined at a slower rate than in its pure *** of Z-ligustilide after administration in its pure form was significantly slower than that of SFE of ASR(CL,0.96±0.16 mL·min/kg versus 1.24±0.21 mL·min/kg P<0.05;AUC,243.37±16.84 versus 176.69±12.59 mg·min/L).Conclusion:These phenomena may be attributed to the interactions between the co-existent components in SFE of ASR and Z-ligustilide enhancing the stability of *** results suggest that the bioavailability of Z-ligustilide in SFE of ASR is ***,stabilization of plasma concentration was not sustained,so that the efficacy of active components could not be ***,further processing of SFE of ASR is required.

关键词： Angelica Sinensis Radix Supercritical fluid extract Z-ligustilide Metabolism

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