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Regulating the Solvation Structure of Li^(+) Enables Chemical Prelithiation of Silicon-Based Anodes Toward High-Energy Lithium-Ion Batteries

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Nano-Micro Letters 2023年第7期15卷 293-305页

作者： wenjie he Hai Xu Zhijie Chen Jiang Long Jing Zhang Jiangmin Jiang Hui Dou Xiaogang Zhang Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Material Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing 210016People’s Republic of China School of Materials Science and Engineering Henan Polytechnic UniversityJiaozuo 454003People’s Republic of China Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments School of Materials Science and PhysicsChina University of Mining and TechnologyXuzhou 221116People’s Republic of China

The solvation structure of Li^(+) in chemical prelithiation reagent plays a key role in improving the low initial Coulombic efficiency(ICE) and poor cycle performance of silicon-based materials. Never theless, the chemical prelithiation agent is difficult to dope active Li^(+) in silicon-based anodes because of their low working voltage and sluggish Li^(+) diffusion rate. By selecting the lithium–arene complex reagent with 4-methylbiphenyl as an anion ligand and 2-methyltetrahydrofuran as a solvent, the as-prepared micro-sized Si O/C anode can achieve an ICE of nearly 100%. Interestingly, the best prelithium efficiency does not correspond to the lowest redox half-potential(E_(1/2)), and the prelithiation efficiency is determined by the specific influencing factors(E_(1/2), Li^(+) concentration, desolvation energy, and ion diffusion path). In addition, molecular dynamics simulations demonstrate that the ideal prelithiation efficiency can be achieved by choosing appropriate anion ligand and solvent to regulate the solvation structure of Li^(+). Furthermore, the positive effect of prelithiation on cycle performance has been verified by using an in-situ electrochemical dilatometry and solid electrolyte interphase film characterizations.

关键词： Lithium-ion batteries Silicon-based anodes Prelithiation Molecular dynamics simulations Solvation structure

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数字技术助力乡村振兴的掣肘与突破路径

智慧农业导刊 2024年第15期4卷 23-26页

作者：邓泓王祖明何雯洁黄伟继彭莹琼江西农业大学南昌330045

党的二十大指出,全面建设社会主义现代化国家最艰巨最繁重的任务仍在农村。数字乡村是实现农业农村现代化的重要途径。虽然农村地区推广数字技术虽然已经取得成效,但是农村数字基础设备薄弱、农民数字化意识不高、乡村数字人才稀缺、高... 详细信息

党的二十大指出,全面建设社会主义现代化国家最艰巨最繁重的任务仍在农村。数字乡村是实现农业农村现代化的重要途径。虽然农村地区推广数字技术虽然已经取得成效,但是农村数字基础设备薄弱、农民数字化意识不高、乡村数字人才稀缺、高校教育模式匹配度不高和网络安全等问题严重影响到数字技术对乡村振兴的赋能效应。因此,该文从数字乡村政策、提升数字化意识、培养数字化人才、保障乡村网络安全和改革高校教育等方面提出对策建议,为推进乡村数字建设、实现农村经济高质量发展提供可参考借鉴的经验。

关键词：乡村振兴数字技术高校教育数字乡村赋能效应

Adsorptive behaviors of humic acid onto freshly prepared hydrous manganese dioxides

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Frontiers of Environmental Science & Engineering 2007年第2期1卷 240-245页

作者： LIU Ruiping YANG Yanling LI Guibai he wenjie HAN Hongda School of Municipal and Environmental Engineering Harbin Institute of TechnologyHarbin 150090China College of Civil Engineering and Architecture Beijing University of TechnologyBeijing 100022China Tianjin Water Supply Group Co.Ltd Tianjin 300040China

This study focused on the adsorptive behaviors of humic acid onto freshly prepared hydrous MnO_(2)(s)(δMnO_(2)),and investigated the feasibility of employingδMnO2 for humic acid removal from drinking *** of such parameters as molecular mass of humic acid,kinds of diva-lent cations on adsorptive behaviors and possible mechanisms involved were *** study indicated that humic acid with higher molecular mass exhibited more tendency of adsorbing ontoδMnO2 than that with lower molecular ***^(2+)facilitated more humic acid adsorption than Mg^(2+);UV-Vis spectra analysis indicated higher capabilities of Ca^(2+)coordinating with acidic functional groups of humic acid than that of Mg2+.Additionally,ζpotential characterization indicated that Ca^(2+)showed higher potential of increasingζpotential ofδMnO_(2) than Mg^(2+).Ca^(2+)of 1.0 mmol/L increasedζpotential ofδMnO2 from−37 mV(pH 7.9)to+7 mV(pH 7.2),while 1.0 mmol/L Mg^(2+)^increased to lower value as−9 mV(pH 6.5),*** transform infrared(FTIR)spectra demonstrated the adsorption of humic acid ontoδMnO_(2),showing the important roles of-COO−function-al groups and surface Mn-OH in the adsorption of humic acid ontoδMnO_(2).

关键词： δMnO_(2) humic acid adsorptive behavior ζpotential molecular mass

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薇甘菊叶绿体基因组密码子偏好性分析

广西林业科学 2024年第3期53卷 329-338页

作者：何雯杰黄华枝张驰梁宗锁昌秦湘浙江理工大学生命科学与医药学院浙江杭州310018 广东轻工职业技术大学生态环境技术学院广东广州510300 太原学院园林科学研究所山西太原030012

为探究薇甘菊(Mikania micrantha)叶绿体基因组密码子使用模式和影响其偏好性的主要因素,从NCBI数据库下载并筛选出53条长度大于300 bp的叶绿体蛋白编码基因,采用CodonW 1.4.2、DNASTAR和SPSS 26.0等软件,对其密码子偏好性和成因进行多... 详细信息

为探究薇甘菊(Mikania micrantha)叶绿体基因组密码子使用模式和影响其偏好性的主要因素,从NCBI数据库下载并筛选出53条长度大于300 bp的叶绿体蛋白编码基因,采用CodonW 1.4.2、DNASTAR和SPSS 26.0等软件,对其密码子偏好性和成因进行多方面分析。结果表明,薇甘菊叶绿体基因组密码子3个位点的GC平均含量表现为GC1(47.06%)>GC2(39.85%)>GC3(28.16%);GC3含量为17.65%~36.93%。有效密码子数目(ENC)均值远大于35.00,表明密码子偏性较弱。RSCU值大于1.00的密码子有27个,其中第3位碱基使用A或U的密码子占比88.88%,表明薇甘菊密码子第3位碱基偏好使用A或U。中性绘图、ENC-plot和PR2-plot等分析结果表明,在影响薇甘菊密码子偏好性的众多因素中,自然选择发挥主要作用。CAU、ACA和CGU为最优密码子。研究结果可为薇甘菊叶绿体基因组学研究提供参考。

关键词：叶绿体基因组密码子偏好性薇甘菊

油耗仪放置高度对非道路移动机械用小型点燃式发动机油耗测量的影响

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小型内燃机与车辆技术 2024年第1期53卷 72-74页

作者：贺文杰张松王青张智轩曹洋天津内燃机研究所(天津摩托车技术中心) 天津300072

非道路移动机械用小型点燃式发动机在我国的应用越来越普及,为了实现节能减排的目的,我国在2019年6月4日发布了GB/T 37692-2019《非道路移动机械用小型点燃式发动机工况法燃料消耗率限值与测量方法》,并于2020年1月1日开始实施。通过对... 详细信息

非道路移动机械用小型点燃式发动机在我国的应用越来越普及,为了实现节能减排的目的,我国在2019年6月4日发布了GB/T 37692-2019《非道路移动机械用小型点燃式发动机工况法燃料消耗率限值与测量方法》,并于2020年1月1日开始实施。通过对油耗仪在测量时的放置高度对非道路移动机械用小型点燃式发动机油耗测量的影响进行研究,为我国的非道路移动机械用小型点燃式发动机油耗测量提供一些参考。

关键词：非道路移动机械小型点燃式发动机工况法燃油消耗率测量高度

NLR、AFP、GGT联合检测在原发性肝癌中的应用价值

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中国医药科学 2024年第13期14卷 129-132页

作者：钟丽萍卢珮何文杰黄伟秦雪广西医科大学第一附属医院检验科广西南宁530021 广西壮族自治区崇左市人民医院检验科广西崇左532200

目的探讨中性粒细胞与淋巴细胞比值(NLR)、甲胎蛋白(AFP)、谷氨酰转移酶(GGT)在原发性肝癌中的应用价值。方法选取崇左市人民医院2020年1月至2023年8月320例患者数据,包括原发性肝癌患者100例(肝癌组),肝硬化患者100例(肝硬化组),慢性... 详细信息

目的探讨中性粒细胞与淋巴细胞比值(NLR)、甲胎蛋白(AFP)、谷氨酰转移酶(GGT)在原发性肝癌中的应用价值。方法选取崇左市人民医院2020年1月至2023年8月320例患者数据,包括原发性肝癌患者100例(肝癌组),肝硬化患者100例(肝硬化组),慢性乙型肝炎患者60例(肝炎组),健康体检者60例(对照组)。比较各组NLR、AFP、GGT水平及其在肝癌分期中的变化;评价NLR、AFP、GGT诊断原发性肝癌的效能。结果肝癌组NLR、AFP水平高于其余各组(P<0.05);肝硬化组NLR、AFP水平高于对照组(P<0.05);GGT水平在肝癌组、肝硬化组、肝炎组、对照组中依次降低(P<0.05)。肝癌Ⅲ~Ⅳ期AFP水平高于Ⅰ~Ⅱ期(P<0.05)。受试者工作特征曲线(ROC)显示,NLR、AFP、GGT联合诊断原发性肝癌AUC值为0.910;灵敏度为86.0%;特异度为78.2%,优于单项检测效能。结论NLR、AFP、GGT在原发性肝癌患者中的水平明显升高,三者联合检测可提升对原发性肝癌的诊断效能。

关键词：中性粒细胞与淋巴细胞比值甲胎蛋白谷氨酰转移酶原发性肝癌

Variable valence Mo^(5+)/Mo^(6+)ionic bridge in hollow spherical g-C_(3)N_(4)/Bi_(2)MoO_(6) catalysts for promoting selective visible light-driven CO_(2)photoreduction into CO

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Journal of Energy Chemistry 2023年第5期80卷 361-372,I0009页

作者： wenjie he Yuechang Wei Jing Xiong Zhiling Tang Yingli Wang Xiong Wang Hui Xu Xiao Zhang Xiaolin Yu Zhen Zhao Jian Liu State Key Laboratory of heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBejing 102249China Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of ChemistryChinese Academy of SciencesBeijing 100190China

herein,the catalysts of ultrathin g-C_(3)N_(4)surface-modified hollow spherical Bi2MoO6(g-C_(3)N_(4)/Bi2MoO6,abbreviated as CN/BMO)were fabricated by the co-solvothermal *** variable valence Mo^(5+)/Mo^(6+)ionic bridge in CN/BMO catalysts can boost the rapid transfer of photogenerated electrons from Bi2MoO6to g-C_(3)N_(4).And the synergy effect of g-C_(3)N_(4)and Bi2MoO6components remarkably enhance CO_(2)adsorption ***/BMO-2 catalyst has the best performances for visible light-driven CO_(2)reduction compared with single Bi2MoO6and g-C_(3)N_(4),i.e.,its amount and selectivity of CO product are 139.50μmol g-1and 96.88%for 9 h,*** on the results of characterizations and density functional theory calculation,the photocatalytic mechanism for CO_(2)reduction is *** high-efficient separation efficiency of photogenerated electron-hole pairs,induced by variable valence Mo^(5+)/Mo^(6+)ionic bridge,can boost the rate-limiting steps(COOH*-to-CO*and CO*desorption)of selective visible light-driven CO_(2)conversion into *** inspires the establishment of efficient photocatalysts for CO_(2)conversion.

关键词： g-C_(3)N_(4) Bi_(2)MoO_(6) Mo^(5+)/Mo^(6+)ionic bridge CO_(2)photoconversion CO production

Z-scheme heterojunction of SnS_(2)-decorated 3DOM-SrTiO_(3) for selectively photocatalytic CO_(2) reduction into CH4

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Chinese Chemical Letters 2020年第10期31卷 2774-2778页

作者： wenjie he Xingxing Wu Yifei Li Jing Xiong Zhiling Tang Yuechang Wei Zhen Zhao Xiao Zhang Jian Liu State Key Laboratory of heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing 102249China

The rapid recombination of photoinduced electron-hole pairs as well as the deficiency of high-energy carriers restricted the redox ability and products ***,the heterojunction of SnS_(2)-deco rated three-dimensional ordered macropores(3DOM)-SrTiO_(3) catalysts were in-situ constructed to provide transmit channel for high-energy electron *** suitable band edges of SnS_(2) and SrTiO_(3) contribute to the Z-scheme transfer of photogenerated *** 3DOM structure of SrTiO_(3)-based catalyst possesses the slow light effect for enhancing light adsorption efficiency,and the surface alkalis strontium is benefit to the boosting adsorption for CO_(2).The in-situ introduced SnS_(2) decorated on the macroporous wall surface of 3DOM-SrTiO_(3) altered the primary product from CO to *** Z-scheme electron transfer from SnS_(2) combining with the holes in SrTiO_(3) occurred under full spectrum photoexcitation,which improved the excitation and utilization of photogene rated electrons for C02 multi-electrons *** a result,(SnS_(2))3/3 DOM-SrTiO_(3) catalyst exhibits higher activity for photocatalytic CO_(2) reduction to CH4 compared with single SnS_(2) or 3 DOM-SrTiO_(3),i.e.,its yield and selectivity of CH4 are 12.5μmol g^(-1) h^(-1) and 74.9%,re *** present work proposed the theoretical foundation of Z-scheme heterojunction construction for enhancing photocatalytic activity and selectivity for CO_(2) conversion.

关键词： 3DOM-SrTiO3 SnS_(2) Z-scheme heterojunction CO_(2)conversion CH4 selectivity

B-doped SiO_(x) composite with three dimensional conductive network for high performance lithium-ion battery anode

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Journal of Materiomics 2021年第4期7卷 802-809页

作者： wenjie he Tengfei Zhang Zhiwei Li Jiangmin Jiang Chenglong Chen Nan Liu Hui Dou Xiao Gang Zhang Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies College of Material Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing210016China School of Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China Key Laboratory of Preparation and Applications of Environmental Friendly Material of the Ministry of Education Jilin Normal UniversityChangchun130103China

Currently,the practical application of SiO_(x) still has a huge hindrance in the area of lithium ion battery,because it is unable to achieve an effective contact with surrounding conducting materials,resulting in failure to form lithium ion migration *** this work,we presented a facile method to synthesize the B-doped SiOx composite by adhering SiO_(x) particles with MWCNT(multi-walled carbon nanotube)under the assistance of lithium metaborate(LiBO_(2)).LiBO_(2),as a sintering aid,not only can react with SiO_(x) to form a compacted framework,but also build a three-dimensional(3D)conductive network for ions ***,B-SiO_(x)@CNT@LBO anode delivers a remarkable lithium storage performance in terms of long cycles and high rate capability.A full cell coupled with NCM622 cathode achieves a high energy density of 429.5 Wh kg^(-1) based on the total mass of cathode.

关键词： Lithium-ion batteries Silicon oxides Lithium metaborate Ions and electrons transportation 3D conductive network