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In situ formed LiF-Li_(3)N interface layer enables ultra-stable sulfide electrolyte-based all-solid-state lithium batteries

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Journal of Energy Chemistry 2023年第4期79卷 272-278页

作者： Ming Wu Mengqi Li Yuming Jin Xinshuang Chang Xiaolei Zhao Zhi Gu gaozhan liu Xiayin Yao School of Material Science and Chemical Engineering Ningbo UniversityNingbo 315211ZhejiangChina Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Sulfide solid electrolytes are promising for high energy density and safety in all-solid-state batteries due to their high ionic conductivity and good mechanical properties.However,the application of sulfide solid electrolytes in all-solid-state batteries with lithium anode is restricted by the side reactions at lithium/electrolytes interfaces and the growth of lithium dendrite caused by nonuniform lithium deposition.Herein,a homogeneous LiF-Li_(3)N composite protective layer is in situ formed via a manipulated reaction of pentafluorobenzamide with Li metal.The LiF-Li_(3)N layer with both high interfacial energy and interfacial adhesion energy can synergistically suppress side reactions and inhibit the growth of lithium dendrite,achieving uniform deposition of lithium.The critical current densities of Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl are increased to 3.25 and 1.25 mA cm^(-2)with Li@LiF-Li_(3)N layer,which are almost triple and twice as those of Li-symmetric cells in the absence of protection layer,respectively.Moreover,the Li@LiF-Li_(3)N/Li10GeP2S12/Li@LiF-Li_(3)N cell can stably cycle for 9000 h at 0.1 mA cm^(-2)under 0.1 mA h cm^(-2),and Li@LiF-Li_(3)N/Li_(6)PS_(5)Cl/Li@LiF-Li_(3)N cell achieves stable Li plating/stripping for 8000 h at 0.1 mA cm^(-2)under10 m A h cm^(-2).The improved dynamic stability of lithium plating/stripping in Li@LiF-Li_(3)N/Li_(10)GeP_(2)S_(12)or Li_(6)PS_(5)Cl interfaces is proved by three-electrode cells.As a result,LiCoO_(2)/electrolytes/Li@LiF-Li_(3)N batteries with Li_(10)GeP_(2)S_(12)and Li_(6)PS_(5)Cl exhibit remarkable cycling stability of 500 cycles with capacity retentions of 93.5%and 89.2%at 1 C,respectively.

关键词： LiF-Li_(3)N Sulfide solid electrolytes Interface modification High interface energy All-solid-state batteries

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NASICON-structured Na3.1Zr1.95Mg0.05Si2PO12 solid electrolyte for solid-state sodium batteries

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Rare Metals 2018年第6期37卷 480-487页

作者： Jing Yang HongLi Wan ZhiHua Zhang gaozhan liu XiaoXiong Xu YongSheng Hu Xia-Yin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and Devices Institute of PhysicsChinese Academy of Sciences Beijing 100190 China

Using stable inorganic solid electrolyte to replace organic liquid electrolyte could significantly reduce potential safety risks of rechargeable batteries. Na-superionic conductor （NASICON）-structured solid electrolyte is one of the most promising sodium solid electrolytes and can be employed in solid-state sodium batteries. In this work, a NASICON-structured solid electrolyte Na3.1Zr1.95Mg0.05Si2PO12 was synthesized through a facile solid-state reaction, yielding high sodium-ionic conductivity of 1.33 × 10-3 S.cm^-1 at room temperature. The results indicate that Mg^2＋ is a suitable and economical substitution ion to replace Zr^4＋, and this synthesis route can be scaled up for powder preparation with low cost. In addition to electrolyte material preparation, solid-state batteries with Na3.1Zr1.95Mg0.05Si2PO12 as electrolyte were assembled. A specific capacity of 57.9 mAh·g^-1 is maintained after 100 cycles under a current density of 0.5C rate at room temperature. The favorable cycling performance of the solid-state battery suggests that Na3.1Zr1.95Mg0.05Si2PO12 is an ideal electrolyte candidate for solid-state sodium batteries.

关键词： Solid electrolyte NASICON-type structure Sodium-ionic conductivity Solid-state sodium battery

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Air exposure towards stable Li/Li_(10)GeP_(2)S_(12) interface for all-solid-state lithium batteries

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Materials Futures 2022年第2期1卷 1-8页

作者： Wei Weng Dong Zhou gaozhan liu Lin Shen Mengqi Li Xinshuang Chang Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Moist air is a great challenge for manufacturing sulfide-based all-solid-state lithium batteries as the water in air will lead to severe decomposition of sulfide electrolytes and release H2S gas.However,different with direct reaction with water,short-period air exposure of Li_(10)GeP_(2)S_(12) sulfide electrolyte with controlled humidity can greatly enhance the stability of Li_(10)GeP_(2)S_(12) against lithium metal,thus realizing stable Li_(10)GeP_(2)S_(12) based all-solid-state lithium metal batteries.During air exposure,partial hydrolysis reaction occurs on the surface of Li_(10)GeP_(2)S_(12) pellets,rapidly generating a protective decomposition layer of Li4P2S6,GeS2 and Li2HPO3 in dozens of seconds.This ionically conductive but electronically insulation protecting layer can effectively prevent the severe interface reaction between Li_(10)GeP_(2)S_(12) and lithium metal during electrochemical cycling.The Li/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li cell shows long cycling stability for 1000 h.And the LiCoO_(2)/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li batteries present good rate capability and long cyclic performances,showing capacity retention of 80%after 100 cycles.

关键词： Li_(10)GeP_(2)S_(12) lithium metal interface stability air-exposure treatment all-solid-state lithium batteries

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All-Solid-State Lithium Batteries with Sulfide Electrolytes and Oxide Cathodes

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Electrochemical Energy Reviews 2021年第1期4卷 101-135页

作者： Jinghua Wu Lin Shen Zhihua Zhang gaozhan liu Zhiyan Wang Dong Zhou Hongli Wan Xiaoxiong Xu Xiayin Yao Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Zhejiang Funlithium New Energy Technology Co. Ltd.Ningbo 315201ZhejiangChina Ganfeng Lithium Co. Ltd.Xinyu 338015JiangxiChina

All-solid-state lithium batteries(ASSLBs)have attracted increasing attention due to their high safety and energy density.Among all corresponding solid electrolytes,sulfide electrolytes are considered to be the most promising ion conductors due to high ionic conductivities.Despite this,many challenges remain in the application of ASSLBs,including the stability of sulfide electrolytes,complex interfacial issues between sulfide electrolytes and oxide electrodes as well as unstable anodic interfaces.Although oxide cathodes remain the most viable electrode materials due to high stability and industrialization degrees,the matching of sulfide electrolytes with oxide cathodes is challenging for commercial use in ASSLBs.Based on this,this review will present an overview of emerging ASSLBs based on sulfide electrolytes and oxide cathodes and high-light critical properties such as compatible electrolyte/electrode interfaces.And by considering the current challenges and opportunities of sulfide electrolyte-based ASSLBs,possible research directions and perspectives are discussed.

关键词： All-solid-state lithium batteries Sulfide electrolytes Oxide cathodes Interfaces

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Application of Air-cooled Blast Furnace Slag Aggregates as Replacement of Natural Aggregates in Cement-based Materials：A Study on Water Absorption Property

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Journal of Wuhan University of Technology(Materials Science) 2018年第2期33卷 445-451页

作者：王爱国 liu peng liu kaiwei li yan zhang gaozhan 孙道胜 Anhui Key Laboratory of Advanced Building Materials Anhui Jianzhu University Hefei 230022 China

The influence of air-cooled blast furnace slag aggregates as replacement of natural aggregates on the water absorption of concrete and mortar was studied, and the mechanism was analyzed. The interface between aggregate and matrix in concrete was analyzed by using a micro-hardness tester, a laser confocal microscope and a scanning electron microscope with backscattered electron image mode. The pore structure of mortar matrixes under different curing conditions was investigated by mercury intrusion porosimetry. The results showed that when natural aggregates were replaced with air-cooled blast furnace slag aggregates in mortar or concrete, the content of the capillary pore in the mortar matrix was reduced and the interfacial structure between aggregate and matrix was improved, resulting in the lower water absorption of mortar or concrete. Compared to the concrete made with crushed limestone and natural river sand, the initial absorption coefficient, the secondary absorption coefficient and the water absorption capacity through the surface for 7 d of the concrete made from crushed air-cooled blast furnace slag and air-cooled blast furnace slag sand were reduced by 48.9%, 52.8%, and 46.5%, respectively.

关键词： air-cooled blast furnace slag aggregate cement-based materials water absorption coefficient interface structure

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Effect of Corrosive Ions (Cl^-,SO4^2-,and Mg^2+) on the Nanostructure and Chloride Binding Property of C-A-S-H Gel

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1061-1072页

作者： JIN Shucheng liu Kai ZHANG gaozhan SHI Hua DING Qingjun 徐文远 School of Civil Engineering Northeast Forestry UniversityHarbin 150040China China Construction Ready Mixed Concrete Co. LtdWuhan 430200China School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China

The nanostructure and chloride binding capacity evolution of C-A-S-H gel exposed to aggressive solutions were investigated,utilizing 29Si NMR,27Al NMR,SEM-EDS,and XRD techniques.The experimental results show that while Cl-ions show a smaller effect on the microstructure of C-A-S-H sample,and SO4^2-ions can react with C-A-S-H,resulting in decreasing Ca/Si and Al[4]/Si for the C-A-S-H gel (i e,decalcification and dealuminization).The presence of Mg^2+ ions can aggravate the decalcifying and dealuminizing effects of SO4^2-ions on the C-A-S-H.With decreasing Ca/Si ratio and aluminum substitution for the original C-A-S-H gel,the depolymerization degree of silicate tetrahedra increases and the calcium aluminosilicate skeleton strengthens.C-A-S-H gel with lower Ca/Si ratio and higher Al[4]/Si ratio shows gentler nanostructure evolution under chemical attack,i e,improving thermodynamic stability under chemical attack.Furthermore,the chloride binding capacity of C-A-S-H gel is decreased after the sulfate attack.Aluminum substitution can also help C-A-S-H gel resist the degraded chloride binding capacity induced by sulfate attack.

关键词： calcium-silicate-hydrate ions attack Ca/Si ratio Al/Si aluminum uptake

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土壤原位触探技术与贯入机理研究进展

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光学精密工程 2023年第5期31卷 588-620页

作者：刘晴昊李玉琼李娜薛健崔高瞻邹欧中国科学院大学、工程科学学院北京100049 中国科学院、力学研究所、流固耦合系统力学重点实验室北京100190 中国科学院、力学研究所、非线性力学国家重点实验室北京100190

土壤原位触探技术是一种获取土壤物理力学参数的重要方法,具有准确、快速、可连续测试等优点,在海洋岩土勘探、行星表面地质探测、军用车辆越野路面机动性评估等领域具有广阔的应用背景。本文系统地概述了土壤原位触探技术的发展历程、... 详细信息

土壤原位触探技术是一种获取土壤物理力学参数的重要方法,具有准确、快速、可连续测试等优点,在海洋岩土勘探、行星表面地质探测、军用车辆越野路面机动性评估等领域具有广阔的应用背景。本文系统地概述了土壤原位触探技术的发展历程、仪器组成与基本原理,并介绍了其在民用与国防领域的应用。基于圆锥静力触探和自落式动力触探这两种典型的原位触探技术,总结了理论分析方法、数值模拟方法和试验方法在贯入机理研究方面的进展。最后,对土壤原位触探技术进行了展望,为土壤原位触探技术未来的发展提供了理论依据和工程技术参考。

关键词：土壤原位触探技术土壤物理力学参数圆锥静力触探自落式动力触探贯入机理

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中国价值观国际传播的范例与启示——基于云南象北上报道的发散

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新闻研究导刊 2023年第19期14卷 39-41页

作者：刘勇刘高瞻安徽大学新闻传播学院安徽合肥230039

国际传播本身是一个理论色彩不足、实践意味浓重的领域。以往国际传播实践结果是后继国际传播活动的重要依据与借鉴,推动中国价值观的国际传播,是新形势下增强国家文化软实力的必然之举。2020—2021年的云南象北上事件引发了全球关注,... 详细信息

国际传播本身是一个理论色彩不足、实践意味浓重的领域。以往国际传播实践结果是后继国际传播活动的重要依据与借鉴,推动中国价值观的国际传播,是新形势下增强国家文化软实力的必然之举。2020—2021年的云南象北上事件引发了全球关注,西方媒体甚至一反对涉华新闻的双标态度,传播了中国人与大象和谐相处的正面形象。本次研究在明确了云南象北上事件的国际传播效果之后,搜集了以CGTN为主的媒体自2020年3月至2021年11月关于云南象北上的新闻并进行内容分析,认为在其长达半年的集中报道中借用内涵丰富的大象载体,从报道数量篇幅的安排、叙事视角的选择和大象无形的兼容特点等角度,做到了让中国价值观与西方价值观交流互鉴,挖掘中国价值观中的人类共通部分,通过共享价值观搭桥展示了中国特色社会主义核心价值观,总结其价值观建构和传播策略。文章认为价值观国际传播要做到常态化与长期化相结合,目前着力于在总体的劣势下取得局部突破和成功,并创新受众导向的话语表达方式,既避免抽象的描写、空泛的议论,又克制情感的价值导向,最后要调动更多传播资源,直面国际受众更多借助西方媒体了解中国这一事实,利用他者平台讲述中国故事。

关键词：中国价值观国际传播云南象报道共享价值观

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High Power 940 nm Al-free Active Region Laser Diodes and Bars with a Broad Waveguide

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Chinese Journal of Lasers 2002年第1期11卷 10-14页

作者： FANG gaozhan XIAO Jianwei MA Xiaoyu XU Zuntu ZHANG Jinming TAN Manqing liu Zongshun liu Suping FENG Xiaoming (Institute of Semiconductors, The Chinese Academy of Sciences, National Engineering Research Center for Optoelectronics Devices, Beijing Institute of Semiconductors The Chinese Academy of Sciences National Engineering Research Center for Optoelectronics Devices 北京 100083

The 940 nm Al-free active region laser diodes and bars with a broad waveguide were designed and fabricated. The stuctures were grown by metal organic chemical vapour deposition. The devices show excellent performances. The maximum output power of 6.7 W in the 100 μm broad-area laser diodes has been measured, and is 2.5 times higher than that in the Al-containing active region laser diodes with a narrow waveguide and 1.7 times higher than that in Al-free active region laser diodes with a narrow waveguide. The 19% fill-factor laser diode bars emit 33 W, and they can operate at 15W with low degradation rates.

关键词： laser diode bar waveguide Al-free

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蒲公英中黄酮的响应面法优化提取和同步荧光法检测研究

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动物营养学报 2023年第2期35卷 1349-1360页

作者：李军德张高瞻刘晓娟宋吉英青岛农业大学校医院青岛266109 青岛农业大学化学与药学院青岛266109

本试验应用响应面法优化超声-微波协同萃取蒲公英中黄酮的提取工艺,并建立测定黄酮含量的同步荧光法。在单因素试验结果的基础上,以提取溶剂乙醇浓度、微波功率、萃取时间和料液比为自变量,提取液的荧光强度为响应值,设计4因素3水平响... 详细信息

本试验应用响应面法优化超声-微波协同萃取蒲公英中黄酮的提取工艺,并建立测定黄酮含量的同步荧光法。在单因素试验结果的基础上,以提取溶剂乙醇浓度、微波功率、萃取时间和料液比为自变量,提取液的荧光强度为响应值,设计4因素3水平响应面试验,优化蒲公英中黄酮的提取工艺;单因素试验确定同步荧光法的测定条件。结果表明:1)判定系数R^(2)=0.9648,说明模型与实际结果拟合程度好,所得模型能解释96.48%的响应值改变,校正判定系数(R_(Adj)^(2)=0.9295)与预测判定系数(R_(Pred)^(2)=0.8860)接近。2)响应面法优化超声-微波协同萃取技术提取蒲公英中的黄酮,其最佳提取条件为乙醇浓度50%,微波功率250 W,萃取时间30 min,料液比1∶30(g∶mL)。3)同步荧光法的最佳测定条件为波长差值(Δλ)=55 nm,Al(NO_(3))_(3)浓度0.2%,加入pH=6的醋酸-醋酸钠缓冲液1 mL,室温条件下反应50 min。在最佳测定条件下,测得蒲公英中黄酮的含量为3.52 mg/g。由此可见,响应面法优化提取工艺能较好地用于蒲公英中黄酮的提取,同步荧光法测定黄酮含量的方法干扰少、准确度高。

关键词：蒲公英黄酮响应面法超声-微波协同萃取同步荧光

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