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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 mechanism.However,the solvation structure may compromise the mechanical performance and safety,hindering practical application of SPEs.In 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) nanowires.Simultaneously,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 transport.Additionally,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 PVDF-HFP.Based 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 circuit.The 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 C.This 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 batteries.Nevertheless,the poor ionic conductivity at room temperature(RT)and low resistance to Li dendrites seriously hinder the commercialization of SPEs.Herein,we design a bifunctional flame retardant SPE by combining hydroxyapatite(HAP)nanomaterials with Nmethyl pyrrolidone(NMP)in the PVDF-HFP matrix.The 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 matrix.Consequently,the prepared SPE demonstrates superior ionic conductivity at RT,excellent fireproof properties,and strong resistance to Li dendrites.The 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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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 decades.Satellite SAR systems use microwave signals that interact with the ionosphere when they travel through it during the imaging processes.In this context,ionospheric variations can significantly contaminate SAR imagery,which in turn affects spaceborne InSAR measurements.This bias also leads to a decrease in the coherence and accuracy of InSAR measurements,especially for the low-frequency SAR systems.In 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 interferograms.The 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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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 perfringens.Methods: 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 C.perfringens 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 B.coagulans 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 IgG concentrations and jejunum IFN-γ mR NA leve

关键词： Bacillus coagulans Broiler chickens Clostridium perfringens Gut health

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Cu/CdcO_(3)catalysts for efficient electrochemical CO_(2)reduction over the wide potential window

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Chinese Chemical Letters 2023年第12期34卷 323-327页

作者： Congwen Sun Jinhui Hao Bing Wei Meng wu Hong Liu Yusong Xiong bochen Hu Longhua Li Min Chen Weidong Shi School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 212013China Schoolof Resource and EnvironmentalEngineering Jjilin Institute of Chemical Technology Jilin 32000Chin

High efficiency and low-cost catalyst-driven electrocatalytic CO_(2)reduction to CO production are of great significance for energy storage and development.The severe competitive hydrogen evolution reaction occurs at large negative potential window limits the achievement of the target product from CO_(2)at high efficiency.Here,we successfully prepared Cu_(x)/CdcO_(3)composite catalyst rich in interfaces,in which achieved high CO Faraday eficiency exceeded 90%in a wide potential window of 700 mV and highest value up to 97.9%at-0.90V vs.RHE.The excellent performance can be ascribed to the positive contribution of Cu_(x)/CdcO_(3),which maintains a suitable high local pH value during electrochemical reduction,thus inhibiting the competitive hydrogen evolution reaction.Moreover,the compact structure between Cu and CdCO_(3)ensures fast electron transfer both inside catalysts and interface,thus speeding up the reaction kinetics of CO_(2)to CO conversion.Theoretically calculations further prove that the combination of Cu and CdcO_(3)provides the well-defined electronic structure for intermediates adsorption,significantly reducing the reaction barrier for the formation of co.This work provides new insights into the design of eficient electrochemical CO_(2)reduction catalysts for inhibiting hydrogen evolution by adjusting the local pH effect.

关键词： OH^(-) Local pH Inhibition of hydrogen evolution CO Wide potential window

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《NLA 2022降低他汀类药物不耐受患者ASCVD风险的新定义和关键考虑因素》解读

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中国循证医学杂志 2023年第9期23卷 999-1004页

作者：吴洋李天力李柏辰王静韩文博王显北京中医药大学东直门医院心内科北京100700 中日友好医院国家心血管病中西医结合中心北京100029 北京中医药大学第三附属医院心内科北京100029

2022年6月,美国脂质学会发布《NLA 2022降低他汀类药物不耐受患者ASCVD风险的新定义和关键考虑因素》,提供了他汀类药物不耐受的最新定义、可改变因素以及治疗策略。该指南指出,针对他汀类药物不耐受,首先调整他汀类药物的用药方案(减... 详细信息

2022年6月,美国脂质学会发布《NLA 2022降低他汀类药物不耐受患者ASCVD风险的新定义和关键考虑因素》,提供了他汀类药物不耐受的最新定义、可改变因素以及治疗策略。该指南指出,针对他汀类药物不耐受,首先调整他汀类药物的用药方案(减少剂量、换用其他的他汀类药物、减少用药频次),若患者仍不能耐受,则考虑使用非他汀药物降低患者ASCVD风险。本文通过对该指南进行解读,帮助临床医生和研究人员积极识别、管理和干预他汀类药物不耐受综合征。

关键词：他汀治疗他汀类药物不耐受非他汀治疗动脉粥样硬化性心血管疾病

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计及SVG的双馈风电场高频阻抗建模及振荡分析

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电网技术 2023年第7期47卷 2905-2915页

作者：熊小玲罗博晨刘京波张扬帆吴宇辉郭春义新能源电力系统国家重点实验室(华北电力大学) 北京市昌平区102206 华北电力科学研究院有限责任公司(国网冀北电力有限公司电力科学研究院) 北京市海淀区100045

接入静止无功发生器(static var generator,SVG)的双馈风电机组(doubly-fed induction generator,DFIG),由于它们的交互作用,易产生高频振荡现象,极大地威胁到了双馈风电场的安全稳定运行。针对这一问题,分别建立了SVG、双馈风力发电机... 详细信息

接入静止无功发生器(static var generator,SVG)的双馈风电机组(doubly-fed induction generator,DFIG),由于它们的交互作用,易产生高频振荡现象,极大地威胁到了双馈风电场的安全稳定运行。针对这一问题,分别建立了SVG、双馈风力发电机组和电缆线路的高频阻抗模型,并通过MATLAB/Simulink仿真平台进行频率扫描,验证了阻抗模型的正确性。经分析发现双馈机组与电缆连接后高频阻抗呈现容性,SVG高频阻抗呈现负电阻电感特性,因此双馈风电场接入SVG后会引发高频谐振现象,导致高频振荡失稳。同时,基于高频阻抗模型研究了接入SVG后影响互联系统高频稳定性的关键因素,发现SVG和DFIG网侧换流器的延时环节、电流环的比例系数是引发风电场高频振荡的主要原因。针对振荡原因,进一步提出了一种基于同步旋转坐标系下电压前馈的SVG阻抗重塑策略,提高了风电场高频稳定性。最后,在MATLAB/Simulink中建立了双馈风电场的电磁暂态仿真模型,结合实际案例参数,验证了理论分析的正确性和阻抗重塑方法的有效性。

关键词：静止无功发生器双馈风机小信号稳定性高频振荡阻抗重塑

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基于特征降维与分块的输电网概率最优潮流深度学习方法

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电力自动化设备 2023年第8期43卷 174-180页

作者：武新章郭苏杭代伟王泽宇赵子巍石博臣张冬冬广西大学电气工程学院广西南宁530004

概率最优潮流需要对非线性最优潮流问题进行重复求解,计算量较大,从而限制了其应用。提出一种基于特征降维、分块和深度神经网络辅助预测的最优潮流两阶段求解方法。在第一阶段,提出基于深度神经网络的最优潮流部分关键决策变量的优先... 详细信息

概率最优潮流需要对非线性最优潮流问题进行重复求解,计算量较大,从而限制了其应用。提出一种基于特征降维、分块和深度神经网络辅助预测的最优潮流两阶段求解方法。在第一阶段,提出基于深度神经网络的最优潮流部分关键决策变量的优先辨识策略,以解决深度学习中因特征维度过高而导致的数值湮没问题,进而以最优潮流的结果特征为导向,基于关联性分析和聚类分析挖掘最优潮流输入与输出特征的关联性匹配度,并构建样本数据的分块特征库,以降低学习难度。在第二阶段,利用深度神经网络完成部分关键决策变量的分块映射,基于潮流模型恢复剩余状态变量,并对计算结果不收敛、不满足约束的情况进行修正,以恢复可行性。根据最优潮流两阶段求解方法构建概率最优潮流求解方法。仿真结果表明所提方法在最优潮流、概率最优潮流的求解速度和求解精度上均有较好的表现。

关键词：最优潮流概率最优潮流深度神经网络关联分析聚类分析潮流修正

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