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Controlled Anodic Decomposition Pathway of Supramolecular Lithium Borate for Rationally Tuned Interphase Chemistry

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2025年第19期64卷 e202500425页

作者： Zhou, Haiyu Hou, Wenhui Zhu, Da Zhou, Pan Peng, xuwen Liu, Zhi yan, Shuaishuai Lu, yang Ou, Yu Liu, Fengxiang Xia, Yingchun Liu, Hao Cao, Qingbin Song, Xuan Guo, Decai Xu, Hong Liu, Kai Tsinghua Univ Dept Chem Engn State Key Lab Chem Engn Beijing 100084 Peoples R China Tsinghua Univ Inst Nucl & New Energy Technol Beijing 100084 Peoples R China SINOPEC Dalian Res Inst Petr & Petrochem 96 Nankai RdTieshan St Dalian 116045 Liaoning Peoples R China

The rational tailoring and molecular-level engineering of stable cathode-electrolyte interphases (CEIs) is paramount to advancing the performance of next-generation high-energy, layered nickel-rich oxide-based lithium metal batteries. However, developing well-tailored electrolyte additives with rationally controlled interfacial chemistry remains highly challenging. Here, two lithium borates: lithium (2-methoxy-15-crown-5)trifluoroborate (C-LiMCFB) and lithium (15-methoxy-2,5,8,11,14-pentaoxahexadecan)trifluoroborate (L-LiMCFB), incorporating cyclic 15-crown-5 (15C5) and linear pentaethylene glycol monomethyl ether (PEGME) as respective host groups tethered to the boron center are designed and synthesized. In C-LiMCFB, the supramolecular polydentate chelation/de-chelation of the 15C5 with Li+ can sequentially deactivate/activate the anodic decomposition of the C & horbar;O bonds, therefore leading to the controlled cleavage pathway of B & horbar;O and C & horbar;O bonds. The controlled interfacial chemistry leads to the formation of a uniform CEI layer, rich in lithium boron-oxygen clusters interwoven with LiF, on the NCM811 surface. This novel CEI configuration demonstrates an exceptional balance of mechanical robustness, adhesiveness, and toughness, providing highly desirable protection for the NCM811 cathode. The discovery of these novel supramolecular boron-based lithium salts not only unlocks supramolecular chemistry for rational electrolyte tuning but also provides a deeper understanding of the CEI formation mechanism in high-energy lithium metal batteries.

关键词： Battery electrolytes Energy storage Lithium metal batteries Supramolecular chemistry

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Interphasial Chemistry Design for Seamless Lithium Deposition in Anode-Free Lithium Metal Batteries

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ADVANCED MATERIALS 2025年

作者： Song, Xuan Liu, Cheng Zhang, Aiyuan Ding, Li Zeng, Tianyou Lu, yang Ou, Yu Hou, Wenhui Zhou, Pan Cao, Qingbin yan, Shuaishuai Liu, Zhi Peng, xuwen Zhou, Haiyu Xia, Yingchun Zhang, Weili Liu, Hao Liu, Kai Tsinghua Univ Dept Chem Engn Beijing 100084 Peoples R China China Acad Space Technol Beijing 100094 Peoples R China Beijing Mingyuan Space Elect Informat Technol Co L Beijing 100080 Peoples R China Tsinghua Univ Hefei Inst Publ Safety Res Hefei 230601 Peoples R China

Anode-free lithium metal batteries (AFLMBs) are promising due to ultrahigh energy density, reduced manufacturing costs, and enhanced safety through active lithium elimination. However, their practical implementation remains challenged by unstable electrode-electrolyte interfaces and the resulting rapid active species depletion. Herein, an ultrathin ion-conducting membrane (ICM) is designed, featuring uniformly distributed rigid benzenesulfonimide anionic groups and flexible lithiophilic groups containing ether oxygen groups. The constrained benzenesulfonimide anions enable exceptional charge separation and reduced spatial resistance, boosting lithium-ion mobility, while the integrated lithophilic network directs lateral lithium deposition through ionic nanochannels. This ICM layer effectively promotes the enrichment of anions at the interface and constructs stable anion-derived solid electrolyte interphases (SEI). Meanwhile, ICM layers with electron-insulating and ion-conducting properties can further prevent side reactions, and suppress dendritic Li growth acting as a natural shield, resulting in seamless lithium deposition. Specifically, the Li||Cu coin cells with ICM achieve 99.82% Coulombic efficiency. The AFLMBs assembled with ICM-coated copper foil (ICM Cu) and NCM811 deliver an energy density of 495 Wh kg-1 with 80.72% capacity retention after 100 cycles. The interphasial chemistry design strategy provides insights into the precise interfacial engineering to realize high-performance, high-safety battery systems and facilitates their development for practical applications.

关键词： anode-free lithium metal batteries dendrite suppression interphasial chemistry ion-conducting membranes solid electrolyte interphases

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Erosion wear resistance mechanism of erosion ripples

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PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE 2022年第19期236卷 10359-10369页

作者： Zhang, yan Zhao, xuwen Wang, Qi Wang, Tianqi Tang, Yuling Tianjin Univ Sci & Technol Tianjin Key Lab Integrated Design & On Line Monit Tianjin Peoples R China Tianjin Univ Sci & Technol Coll Mech Engn Tianjin Peoples R China

Erosion ripples widely exist on natural and industrial surfaces suffering gas-solid flow erosion. During the steady state of erosion ripples formation, the material removal and plastic flow rate of the material basically reach a dynamic equilibrium. In this state, the erosion rate of the surface material is steady and at a low level. In this paper, the relationship between erosion ripples and the erosion characteristics of surface materials was explored by experimental and simulation methods. Under the conditions of air pressures of 0.3, 0.4 and 0.5 MPa and erosion angles of 30 degrees, 40 degrees and 50 degrees, several erosion ripples were prepared on the surface of 1060 aluminium alloy samples by sandblasting. According to the obtained morphological parameters and orthogonal test design, rippled samples with rectangular, triangular and semicircular groove sections were designed. The effect of morphology parameters on the erosion resistance of the sample was analysed by a sandblasting test. The results showed that the rippled samples have lower erosion rates than the plate sample. The cross-sectional shape of grooves is the most obviously affected factor. The velocity distribution and surface pressure distribution on the surface of rippled and plate samples were analysed by FLUENT software, and the results showed that the low-speed reflow vortex will be formed in grooves of erosion ripples that can change the near-wall flow field conditions. The differential pressure generated on two sides of the ridge between adjacent grooves, as well as the area decrease of erosion caused by the "shaded effect," may be the cause of the erosion resistance. The results of this study can provide new insight into the active erosive wear resistance method of mechanical components.

关键词： erosive wear erosion ripple gas-solid flow sandblasting near-wall flow field

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Development and validation of a PCR-RFLP / TaqMan MGB probe method for rapid sex identification of largemouth bass (Micropterus salmoides)

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AQUACULTURE REPORTS 2023年 30卷

作者： Hua, Jixiang Qiang, Jun Tao, Yifan Li, yan Lu, Siqi Bing, xuwen Nanjing Agr Univ Wuxi Fisheries Coll Wuxi 214081 Peoples R China Chinese Acad Fishery Sci Freshwater Fisheries Res Ctr Key Lab Freshwater Fisheries & Germplasm Resources Minist Agr & Rural Affairs Wuxi 214081 Peoples R China

The largemouth bass (Micropterus salmoides) has become an important freshwater fish in China since it was intentionally introduced in the 1980 s, and the amount produced in aquaculture is increasing each year. Females are preferred because they grow faster than males and reach a larger body size. However, the physiological sex cannot be accurately determined from external morphology at the early growth stage, so it is crucial to develop sex-specific molecular markers. In this study, a single nucleotide polymorphism (SNP) marker was developed based on whole genome resequencing data obtained from 30 females and 30 males. This marker made it possible to positively identify male and female largemouth bass. Through Fst value screening, 123 SNP loci significantly associated with sex were obtained, and nearly 40% of them were located on chromosome 7 in a 3.44-Mb sex-linked region. A method of polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) combined with a TaqMan minor groove binder (MGB) probe was developed based on a sex-specific marker. Using this method, male and female fish in four different populations (n = 128) were identified with 100% accuracy. Compared with PCR-RFLP followed by electrophoretic separation of fragments, the PCR-RFLP-TaqMan MGB probe method reduced the time required to identify the sex of largemouth bass. The validation results also indicated that largemouth bass has an XX/XY sex-determination system. In conclusion, we have identified a sex-specific SNP marker for largemouth bass and developed a new technique to identify the sex of largemouth bass rapidly and accurately. These findings provide a scientific basis for further research on mono-sex breeding and the molecular mechanism of sex determination in largemouth bass.

关键词： Largemouth bass Whole genome resequencing Sex-specific SNP Genetic sex identification

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NT-seq: a chemical-based sequencing method for genomic methylome profiling

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GENOME BIOLOGY 2022年第1期23卷 1页

作者： Li, xuwen Guo, Shiyuan Cui, yan Zhang, Zijian Luo, Xinlong Angelova, Margarita T. Landweber, Laura F. Wang, Yinsheng Wu, Tao P. Baylor Coll Med Dept Mol & Human Genet Houston TX 77030 USA Univ Calif Riverside Genet Genom & Bioinformat Grad Program Riverside CA 92521 USA Columbia Univ Dept Biochem & Mol Biophys New York NY USA Columbia Univ Dept Biol Sci New York NY 10027 USA Univ Calif Riverside Dept Chem Riverside CA 92521 USA Baylor Coll Med Huffington Ctr Aging Houston TX 77030 USA Baylor Coll Med Dan L Duncan Comprehens Canc Ctr Houston TX 77030 USA

DNA methylation plays vital roles in both prokaryotes and eukaryotes. There are three forms of DNA methylation in prokaryotes: N-6-methyladenine (6mA), N-4-methylcytosine (4mC), and 5-methylcytosine (5mC). Although many sequencing methods have been developed to sequence specific types of methylation, few technologies can be used for efficiently mapping multiple types of methylation. Here, we present NT-seq for mapping all three types of methylation simultaneously. NT-seq reliably detects all known methylation motifs in two bacterial genomes and can be used for identifying de novo methylation motifs. NT-seq provides a simple and efficient solution for detecting multiple types of DNA methylation.

关键词： DNA methylation Next-generation sequencing Whole-genome epigenetic profiling

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Magnetic Resonance Imaging Manifestations in 13 Cases of Seminal Vesicle Tuberculosis

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INFECTION AND DRUG RESISTANCE 2023年 16卷 6871-6879页

作者： Gan, Wei Bi, yan Fu, xuwen Wei, Jialu Qi, Min He, Jintang Li, Xiang Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept Radiol Kunming 650041 Yunnan Peoples R China Peoples Hosp Lincang Dept Radiol Lincang 677000 Yunnan Peoples R China Kunming Third Peoples Hosp Yunnan Clin Med Ctr Infect Dis Dept Surg Kunming 650041 Yunnan Peoples R China

Objective: This study aimed to examine the radiographic manifestations of seminal vesicle tuberculosis (SVT) on magnetic resonance imaging to gain a deeper understanding of this disease. Methods: The clinical symptoms, general conditions, relevant laboratory tests and radiological data of 13 patients diagnosed with SVT were collected through bacteriological examination. A descriptive analysis was used to explore the composition ratio and rate values of the collected data. Results: All 13 cases (100.0%) showed isointense signals on T1WI and hypointense signals on T2WI in the affected seminal vesicles, with the disappearance of the multi-chambered high signal on T2WI in normal seminal vesicles. Eight cases (61.5%) showed diffusion restriction on DWI of the affected seminal vesicle and significant enhancement on the contrast scan, whereas five cases (38.5%) showed unrestricted diffusion and mild enhancement on the contrast scan. Patients with significant enhancements exhibited higher counts and neutrophil percentages than patients with mild enhancements, with statistically significant differences (Z = 2.196, P = 0.030;Z = 2.781, P = 0.003, respectively). The counts and percentage of lymphocytes, CD3(+)T cells and CD4(+)T cells were significantly lower in patients with significant enhancements than in those with mild enhancements, with statistically significant differences (Z = -2.196, P = 0.030;Z = -2.928, P = 0.002;Z = -2.928, P = 0.002;Z = -2.928, P = 0.002, respectively). Patients with significant enhancements were more likely to have active pulmonary tuberculosis than those with mild enhancements, with a statistically significant difference (P = 0.035). Conclusion: Magnetic resonance imaging reveals distinct radiographic features of SVT, and variations in imaging presentations can indicate a patient's immune status.

关键词： seminal vesicle tuberculosis magnetic resonance imaging genitourinary tuberculosis

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Hierarchical flower-like manganese oxide/polystyrene with enhanced oxidase-mimicking performance for sensitive colorimetric detection of glutathione

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MICROCHIMICA ACTA 2022年第2期189卷 63-63页

作者： Liu, Ying yan, Jianghong Sun, Zhiheng Huang, Yu Li, xuwen Jin, Yongri Jilin Univ Coll Chem 2699 Qianjin Rd Changchun 130012 Peoples R China Jilin Prov Acad Tradit Chinese Med Clin Hosp 1 Changchun 130021 Peoples R China

Glutathione (GSH) is an important antioxidant and free radical scavenger that converts harmful toxins into harmless substances and excretes them out of the body. In this paper, 3D hierarchical flower-like nanozyme named MnO2/PS (polystyrene) was successfully prepared by template method for the first time. After the systematical studies, MnO2/PS nanozyme was evaluated to possess favorable oxidase activity and direct 3,3',5,5'-tetramethylbenzidine (TMB) catalytic ability in the near-neutral environment at room temperature. With the addition of different concentrations of GSH, oxidized TMB can be reduced to TMB with the whole process from blue to nearly colorless be observed by naked eyes. In addition, there is a good linear relationship in the range 1-50 mu M and a detection limit of 0.08 mu M. The method proposed can be successfully applied to the detection of reduced GSH in tablets and injections with good selectivity and high sensitivity. The analysis results exhibited good consistency with the results obtained by HPLC.

关键词： Oxidase-like activity Manganese oxide Flower-like nanozyme GSH detection Colorimetric sensor

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An energetic composite formed of wrinkled rGO sheets wrapped around copper azide nanowires with higher electrostatic safety as a green primary explosive

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RSC ADVANCES 2020年第51期10卷 30700-30706页

作者： Liu, xuwen Hu, yan Li, Tingting Ye, Yinghua Shen, Ruiqi Nanjing Univ Sci & Technol Sch Chem Engn Nanjing Peoples R China Minist Ind & Informat Technol Micronano Energet Devices Key Lab Beijing Peoples R China

A green primary explosive with high energy density and electrostatic safety was synthesized in this work. A precursor consisting of wrinkled reduced graphene oxide sheets wrapped around copper nanowires (CuNWs@rGO) was fabricated through a facile one-pot hydrothermal approach. The as-prepared precursor was deposited on a silicon wafer by electrophoretic deposition technology, which significantly reduced the safety risks of directly handling the powder sample in the azide reaction. Wrinkled rGO sheets wrapped around copper azide nanowires (CANWs@rGO) were preparedin situby reaction of the precursor with HN(3)gas. The initiation capability was tested by using it to detonate hexogen (RDX) against a lead plate with a thickness of 5 mm, and its detonation performance was found to be better than that of commercial diazodinitrophenol (DDNP). The electrostatic sensitivity of the CANWs@rGO composite was investigated, and the result shows that the discharge energy at 50% (E-50%) of CANWs@rGO was 0.96 mJ, which indicates that it has a much higher electrostatic safety than that of pure copper azide (0.05 mJ).

关键词： Nanowires

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Hierarchical TiO2 Nanorod Arrays/Carbon Nanofiber Membranes for Oil-in-Water Emulsion Separation

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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 2020年第48期59卷 21097-21105页

作者： Wu, xuwen Luo, Zhuo Lei, yan Wen, Bianying yang, Dongzhi Beijing Univ Chem Technol Coll Mat Sci & Engn Beijing 100029 Peoples R China Beijing Technol & Business Univ Beijing Key Lab Qual Evaluat Technol Hyg & Safety Beijing 100048 Peoples R China

Although much attention has been paid to efficient treatment of oily wastewater, it is still a tough challenge to treat oilin-water emulsions with tiny oil droplets. In this work, hierarchical TiO2 nanorod arrays/carbon nanofiber composite membranes with multilevel pore structure, attractive superhydrophilicity, and underwater superoleophobicity are fabricated for oil-in-water emulsion separation by a facile electrospinning method followed by hydrothermal synthesis. These membranes exhibit an efficient oil-in-water emulsion separation performance with a separation efficiency above 99% and a high separation flux of 1108.8 L m(-2) h(-1). Interestingly, by inducing hydroxyl groups on TiO2 via UV irradiation, the separation performance is improved further because of the improved hydrophilicity. Simultaneously, benefiting from the excellent chemical stability of the rutile-phase TiO2, the composite membrane shows outstanding corrosion resistance, high temperature resistance, and good recyclability. The composite membrane has a promising prospect in the field of oil-in-water emulsion separation and resource recovery.

关键词： Emulsions Nanofibers Oxides Lipids Membranes

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Mechanistic analysis of the coordination between MbEGS4 and MbEOMT in methyleugenol synthesis by Melaleuca bracteata F. Muell

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INDUSTRIAL CROPS AND PRODUCTS 2024年 222卷

作者： Xiang, xuwen Song, Keke Lin, Yongsheng You, Jingnan Xu, yan Niu, Xianqian Zheng, Guohua Wu, Yingxiang Pan, Heli Li, Yongyu Fujian Agr & Forestry Univ Coll Hort Key Lab Minist Educ Genet Breeding & Multiple Utilizat Cro Fuzhou 350002 Peoples R China Fujian Agr & Forestry Univ Inst Nat Prod Hort Plants Fuzhou 350002 Peoples R China Fujian Agr & Forestry Univ Coll Life Sci Fuzhou 350002 Peoples R China Fujian Agr & Forestry Univ Coll Landscape Architecture & Art Fuzhou 350002 Peoples R China Fujian Inst Trop Crops Zhangzhou 363001 Peoples R China Qingyuan Agr Sci & Technol Extens Serv Ctr Qingyuan 511518 Peoples R China

Methyleugenol is widely found in essential oils from aromatic plants, attracting insects for pollination and possessing antimicrobial and antioxidant features. Methyleugenol content in the essential oil from Melaleuca bracteata leaves is 90.46 %, making it an excellent material for assessing methyleugenol's biosynthetic pathway. Eugenol synthase (EGS) and eugenol-o-methyltransferase (EOMT) represent key genes in methyleugenol's biosynthetic pathway but their respective functions are unclear. In this study, overexpression and virus-induced gene silencing (VIGS) techniques were applied to investigate the major regulatory gene among MbEGS1, MbEGS2, MbEGS3, and MbEGS4 in the biosynthesis pathway of methyleugenol. We also aimed to examine the coordination mechanism between EGS and EOMT in methyleugenol production by M. bracteata. The data revealed MbEGS4 transcription and methyleugenol content were most significantly increased after overexpression of the MbEGS1-4 gene in M. bracteata and Fragaria vesca. Conversely, MbEGS4 transcription and methyleugenol content were most significantly reduced after MbEGS1-4 gene silencing by VIGS in M. bracteata. These results underscore a major regulatory role for the MbEGS4 gene in the biosynthetic pathway of methyleugenol in M. bracteata. Remarkably, upon overexpression and silencing of MbEOMTs, the transcription levels of MbEGSs were notably upregulated, with MbEGS4 showing the highest increase. Collectively, these findings suggested the presence of a specific transcription factor bound to the promoters of MbEGS and MbEOMT, inducing their expression for the synergistic and efficient production of methyleugenol in M. bracteata.

关键词： Phenylpropene Methyleugenol Biosynthesis Eugenol synthase gene

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