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Superior oxygen electrocatalyst derived from metal organic coordination polymers by instantaneous nucleation and epitaxial growth for rechargeable Li-O_(2) battery

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Journal of Energy Chemistry 2023年第3期78卷 169-177,I0005页

作者： Dongdong Li jinbiao chen Yingtong chen Yian Wang Yanpeng Fu Minhua Shao Zhicong Shi Institute of Batteries School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006GuangdongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongChina Energy Institute The Hong Kong University of Science and TechnologyClear Water BayKowloon 999077Hong KongChina Guangzhou HKUST Fok Ying Tung Research Institute Guangzhou 511458GuangdongChina

Rechargeable aprotic Li-O_(2)batteries have attractea increasing attention due to their extremely high capacity,and it is very important to design appropriate strategies to synthesize efficient catalysts used as oxygen cathode.In present work,we present an expedient "instantaneous nucleation and epitaxial growth"(INEG) synthesis strategy for convenient and large-scale synthesis of ultrafine MOCPs nanoparticles(size 50-100 nm) with obvious advantages such as fast synthesis,high yields,low costs and reduced synthetic steps.The bimetallic Ru/Co-MOCPs are further pyrolyzed to obtain bimetallic Coand low content of Ru-based nanoparticles embedded within nitrogen-doped carbon(Ru/Co@N-C) as an efficient catalyst used in Li-O_(2)battery.The Ru/Co@N-C provides porous carbon framework for the ion transportation and O_(2)diffusion,and has large amounts of metal/nonmetal sites as active site to promote the oxygen reduction reaction(ORR)/oxygen evolution reaction(OER) in Li-O_(2)batteries.As a consequence,a high discharge specific capacity of 15246 mA h g^(-1)at 250 mA g^(-1), excellent rate capability at different current densities,and stable overpotential during cycling,are achieved.This work opened up a new understanding for the industrialized synthesis of ultrafine catalysts for Li-O_(2)batteries with excellent structural characteristics and electrochemical performance.

关键词： Ultraﬁne MOCPs Expedient synthesis strategy Derivative Bimetallic sites Rechargeable Li-O_(2)batteries

Effect of LiTFSI and LiFSI on Cycling Performance of Lithium Metal Batteries Using Thermoplastic Polyurethane/Halloysite Nanotubes Solid Electrolyte

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 359-372页

作者： Zhichuan Shen Jiawei Zhong Wenhao Xle jinbiao chen Xi Ke Jianmin Ma Zhicong Shi School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Guangdong Engineering Technology Research Center for New Energy Materials and Devices Guangzhou 510006China School of Physics and Electronics Hunan UniversityChangsha 410082China

All-solid-state lithium batteries(ASSLB) are promising candidates for next-generation energy storage devices.Nevertheless,the large-scale commercial application of high energy density AS S LB with the polymer electrolyte still faces challenges.In this study,a thin solid polymer composite electrolyte(SPCE) is prepared through a facile and cost-effective strategy with an infiltration of thermoplastic polyurethane(TPU),lithium salt(LiTFSI or LiFSI),and halloysite nanotubes(HNTs) in a porous framework of polyethylene separator(PE)(TPU-HNTs-LiTFSI-PE or TPU-HNTs-LiFSI-PE).The composition,electrochemical performance,and especially the effect of anions(TFSI-and FSI-) on cycling performance are investigated.The results reveal that the flexible TPU-HNTs-LiTFSI-PE and TPU-HNTs-LiFSI-PE with a thickness of 34 μm exhibit wide electrochemical windows of 4.9 and 5.1 V(vs.Li+/Li) at 60℃,respectively.Reduction in FSI-tends to form more LiF and sulfur compounds at the interface between TPU-HNTs-LiFSI-PE and Li metal anode,thus enhancing the interfacial stability.As a result,cell composed of TPU-HNTs-LiFSI-PE exhibits a smaller increase in interfacial resistance of solid electrolyte interphase(SEI) with a distinct decrease in charge-transfer resistance during cycling.Li|Li symmetric cell with TPU-HNTs-LiFSI-PE could keep its stable overpotential profile for nearly 1300 h with a low hysteresis of approximately39 mV at a current density of 0.1 mA cm-2,while a sudden voltage rise with internal cell impedance-surge signals was observed within 600 h for cell composed of TPU-HNTs-LiTFSI-PE.The initial capacities of NCMITPU-HNTs-LiTFSIPEILi and NCMITPU-HNTs-LiFSI-PEILi cells were 149 and 114 mAh g-1,with capacity retention rates of 83.52% and89.99% after 300 cycles at 0.5 C,respectively.This study provides a valuable guideline for designing flexible SPCE,which shows great application prospect in the practice of ASSLB.

关键词： Solid polymer composite electrolyte Lithium metal anode Thermoplastic polyurethane Halloysite nanotubes Cycling performance

SiO_(2) nanofiber composite gel polymer electrolyte by in-situ polymerization for stable Li metal batteries

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Chinese Chemical Letters 2023年第3期34卷 536-540页

作者： Zhichuan Shen Jiawei Zhong Jiahong chen Wenhao Xie Kun Yang Yuhan Lin jinbiao chen Zhicong Shi School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

Gel polymer electrolytes(GPEs) are promising alternatives to liquid electrolytes applied in high-energydensity batteries.Here superior SiO_(2) nanofiber composite gel polymer electrolytes(SNCGPEs) are developed via in-situ ionic ring-opening polymerization of 1,3-dioxolane(DOL) monomers in SiO_(2) nanofiber membrane(PDOL-SiO_(2)) for lithium metal batteries.The oxygen atoms of PDOL together with Si-O of SiO_(2) construct a more efficient channel for Li^(+) migration.Consequently,the lithium ion transference number(t_(Li^(+)) and ionic conductivity(σ) at 30℃ of PDOL-SiO_(2) are 0.80 and 1.68×10^(-4)S/cm separately.PDOL-SiO_(2) manifests the electrochemical decomposition potentials of 4.90 V.At 0.5 mA/cm^(2),Li|PDOL-SiO_(2) |Li cell shows a steady cycling performance for nearly 1400 h.LFP|PDOL-SiO_(2) |Li battery can steadily cycle at 0.5 C with a capacity retention rate of 89% after 200 cycles.While cycling at 2 C,the capacity retention rate can maintain at 78% after 300 cycles.This contribution provides a innovative strategy for accelerating Li^(+)transportation via designing PDOL molecular chains throughout the SiO_(2) nanofiber framework,which is crucial for high-energy-density LMBs.

关键词： SiO_(2)nanofiber In-situ polymerization Composite gel polymer electrolytes 1 3-Dioxolane Lithium metal-LFP battery

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BIM技术在建筑工程施工管理中的应用

绿色建造与智能建筑 2024年第3期 48-50页

作者：陈金彪福州市建总投资发展有限公司福州350011

随着建筑产业的快速发展,建筑工程施工管理成为了一个复杂且耗时耗力的过程。传统的施工管理方法已经无法应对复杂的建筑工程,因此需要一种更加高效、精确的施工管理方式。BIM技术作为一种综合性的数字化建模技术,不仅能够减少施工时的... 详细信息

随着建筑产业的快速发展,建筑工程施工管理成为了一个复杂且耗时耗力的过程。传统的施工管理方法已经无法应对复杂的建筑工程,因此需要一种更加高效、精确的施工管理方式。BIM技术作为一种综合性的数字化建模技术,不仅能够减少施工时的误差,还可以提高施工效率,降低成本。本文将探讨BIM技术在建筑工程施工管理中的应用。

关键词： BIM 建筑工程施工管理

Animal models for hepatocellular carcinoma arising from alcoholic and metabolic liver diseases

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Hepatoma Research 2020年第2期6卷 39-54页

作者： Ken Liu jinbiao chen Geoffrey W.McCaughan A.W.Morrow Gastroenterology and Liver Centre Royal Prince Alfred HospitalSydneyNSW 2050Australia Sydney Medical School University of SydneySydneyNSW 2050Australia Liver Injury and Cancer Program Centenary InstituteSydneyNSW 2050Australia

Hepatocellular carcinoma (HCC) is a major and increasing cause of clinical and economic burden worldwide. Now that there are effective therapies to control or eradicate viral aetiologies, the landscape of HCC is changing with alcoholic and metabolic liver diseases becoming major catalysts. The pathogenesis of HCC is complex and incompletely understood, hampering improvements in therapy. Animal models are essential tools for advancing study on the cellular and molecular processes in HCC and for screening potential novel therapies. Many models of hepatocarcinogenesis have been established using various methods including genetic engineering, chemotoxic agents and dietary manipulation to direct implantation of tumour cells. However, none of these can accurately replicate all features found in human diseases. In this review, we provide an overview of different mouse models of HCC with a particular focus on cancer arising from alcoholic liver disease, non-alcoholic fatty liver disease and hereditary haemochromatosis. We also highlight their strengths and limitations and provide perspectives for future study.

关键词： Hepatocellular carcinoma animal models mouse models non-alcoholic fatty liver disease alcohol haemochromatosis

基层治理的地域领域化与阶级生命政治的变迁——以珠海市A镇产业园区为例

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热带地理 2024年第3期44卷 520-531页

作者：李辉霞陈世熠胡珏滢林锦标佛山科学技术学院环境与化学工程学院广东佛山528000 中山大学政治与公共事务管理学院广州510006 云南师范大学教育学部昆明650000

在城市化高速发展的背景下,如何形成空间存量的治理模式是构建现代化治理体系的棘手难题。空间存量中的领域化过程,在市场化的进程中不断地影响着不同群体的生命政治。文章在领域理论的基础上引入福柯生命政治的视角,构建了“社会资本... 详细信息

在城市化高速发展的背景下,如何形成空间存量的治理模式是构建现代化治理体系的棘手难题。空间存量中的领域化过程,在市场化的进程中不断地影响着不同群体的生命政治。文章在领域理论的基础上引入福柯生命政治的视角,构建了“社会资本—空间关系—生命政治”三方耦合互动的领域政治框架。通过对普通工人、中层管理者和高层董事的半结构访谈及问卷调查,探究基层治理领域化过程中工人的生命政治变迁规律。结果表明:产业园区的经济属性塑造了工人、中层干部、高层董事三方不同的生活、生产的空间关系,导致不同阶层的社会资本积累产生差异。同时,工人经历了自我主导到经济依附再到全面依附的生命政治过程。政府一方面需要完善薄弱地区的公共服务建设,另一方面需要逐步减少国家对社会的控制,培养社会组织能力,实现工人自我推进社会服务。文章对理解工人生计演变提供了地学理论视角,描述了不同阶层在空间分布上如何形成生命政治的差异。

关键词：领域理论生命政治基层治理产业园区珠海市

新型含丁烯酸内酯基三氟乙基硫醚(亚砜)类化合物的设计、合成与杀螨活性

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农药学学报 2024年第2期26卷 408-414页

作者：罗时燕陈锦彪林健田平义刘祈星周海峰三峡大学生物与制药学院天然产物研究与利用湖北省重点实验室绿色制药技术与工艺研究中心湖北宜昌443002 顺毅股份有限公司台州市绿色农业化学品开发重点实验室浙江台州318000

为寻找高活性杀螨化合物,以sulfiflumin为先导化合物,保留4-甲基-2-氟-5-(2,2,2-三氟乙硫基)苯胺活性基团,通过其与氯乙酰乙酸乙酯成环合成三氟乙基硫醚丁烯酸内酯的核心骨架C1,再对核心骨架进行氧化、氯代或溴代,以及将内酯环改造为硫... 详细信息

为寻找高活性杀螨化合物,以sulfiflumin为先导化合物,保留4-甲基-2-氟-5-(2,2,2-三氟乙硫基)苯胺活性基团,通过其与氯乙酰乙酸乙酯成环合成三氟乙基硫醚丁烯酸内酯的核心骨架C1,再对核心骨架进行氧化、氯代或溴代,以及将内酯环改造为硫内酯环及二硫代酮酯环得到C2~C87个化合物,采用1H NMR、^(13)C NMR和HRMS手段对其结构进行了表征。生物活性测试数据表明,目标化合物在100 mg/L质量浓度下具有一定的杀螨活性,尤其是对朱砂叶螨Tetranychus cinnabarinus卵孵化的抑制活性较高(校正孵化抑制率67%~93%);此外,化合物C3对二斑叶螨Tetranychus urticae成虫的的校正死亡率达100%。该研究可为丁烯酸内酯基三氟乙基硫醚(亚砜)衍生物和氟吡呋喃酮衍生物的设计和改造提供研究思路,对探究该类化合物的生物活性具有参考意义。

关键词：丁烯酸内酯三氟乙基硫醚(亚砜)类化合物氟吡呋喃酮朱砂叶螨杀螨活性

含咪唑烷酮(吡咯甲酰胺)结构的三氟乙基硫醚(亚砜)类化合物的设计、合成及杀螨活性

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农药 2024年第3期63卷 168-173,180页

作者：陈锦彪罗时燕田平义林健刘祈星周海峰三峡大学生物与制药学院天然产物研究与利用湖北省重点实验室绿色制药技术与工艺研究中心湖北宜昌443002 顺毅股份有限公司台州市绿色农业化学品开发重点实验室浙江台州318000

[目的]研发高活性三氟乙基硫醚(亚砜)类杀螨剂。[方法]以2-氟-4-甲基-5-((2,2,2-三氟乙基)硫基)苯胺为核心骨架,设计合成了系列含咪唑烷酮/吡咯甲酰胺结构的三氟乙基硫醚(亚砜)类新化合物,并对其进行了杀螨活性测试。[结果]在质量浓度为... 详细信息

[目的]研发高活性三氟乙基硫醚(亚砜)类杀螨剂。[方法]以2-氟-4-甲基-5-((2,2,2-三氟乙基)硫基)苯胺为核心骨架,设计合成了系列含咪唑烷酮/吡咯甲酰胺结构的三氟乙基硫醚(亚砜)类新化合物,并对其进行了杀螨活性测试。[结果]在质量浓度为100 mg/L时,目标化合物具有一定的杀螨活性,其中化合物Ⅸb和Ⅹb对朱砂叶螨卵的致死率在96%以上,化合物Ⅸa对二斑叶螨成虫的致死率为100%。[结论]目标化合物具有较好的杀螨活性,为三氟乙基硫醚(亚砜)衍生物的设计和改造提供研究思路,对探究该类化合物的生物活性多样性具有参考意义。

关键词：三氟乙基硫醚(亚砜) 咪唑烷酮衍生物吡咯甲酰胺杀螨活性合成

农地二轮延包实施进路——基于贵州省XF县的调查研究

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决策与信息 2024年第1期 74-85页

作者：安海燕何金彪陈韬宇贵州大学经济学院贵州贵阳550025

第二轮土地承包到期后农地顺利延包是促进乡村振兴之根本。当前我国第二轮土地承包到期后再延长三十年面临“有人无地种,有地无人种”与“保持农户承包地稳定”的现行政策相矛盾、无地少地农民以及“两头占”“两头空”“外嫁女”等特... 详细信息

第二轮土地承包到期后农地顺利延包是促进乡村振兴之根本。当前我国第二轮土地承包到期后再延长三十年面临“有人无地种,有地无人种”与“保持农户承包地稳定”的现行政策相矛盾、无地少地农民以及“两头占”“两头空”“外嫁女”等特殊群体的利益处理这两大突出问题,制定具体农地延包方案迫在眉睫。基于贵州省XF县“第二轮土地承包到期后再延长三十年”试点的调研发现,二轮延包中存在着确权收尾工作难完成、延包主体资格难认定、土地细碎化难处理、延包协议难签订等困境。解决这些困境的实践逻辑为建立登记颁证机制、农户自愿有偿退出承包和未承包地管理机制、缺地少地农户承包地调整机制、矛盾纠纷化解机制、农地承包经营权长效管理机制。具体而言,农地二轮延包的实施路径包括:完成土地确权工作;化解延包矛盾纠纷;承包地退出、收回与管理;数字化赋能农地承包经营权长效管理;政府组织成立专班予以落实。

关键词：土地承包经营权二轮延包未承包地管理农地确权土地流转乡村振兴