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Lithiophilic CoF_(2)@C hollow spheres towards spatial lithium deposition for stable lithium metal batteries

Journal of Energy Chemistry 2024年第10期97卷 55-67,I0002页

作者： Jianxing Wang Shuhao Yao Runming Tao Xiaolang Liu Jiazhi Geng Chang Hong Huiying Li Guiyun Yu Haifeng Li Xiao-Guang Sun Jianlin Li Jiyuan Liang School of Optoelectronic Materials&Technology jianghan UniversityWuhan 430056HubeiChina Institute for Advanced Materials and Manufacturing University of TennesseeKnoxilTN 37996USA School of Chemistry&Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Applied Materials Division Argonne National LaboratoryLemontIL 60439USA

Lithium metal(LM)is a promising anode for next-generation batteries due to its high theoretical capacity and low electrode ***,side reactions,volume change,and unwanted lithium dendrite growth seriously limit the practical application of ***,with the aid of a hard template approach,a novel lithiophilic CoF_(2)-carbon hollow sphere(CoF_(2)@C-HS)composite material is successfully prepared via a facile in-situ fluorination and etching *** lithiophilic CoF_(2) acts as nucleation sites to reduce nucleation overpotential as well as induces the spatial Li deposition and the formation of LiFrich solid electrolyte interphase(SEI),and the hollow carbon matrix can enhance the electrical conductivity and offer free space for LM *** simulations reveal that the synergistic effect of lithiophilic CoF_(2) and hollow carbon matrix homogenizes the electric field distribution and Li~+*** from these advantages,the CoF_(2)@C-HS-modified copper substrate electrode delivers an enhanced Coulombic efficiency(CE)of 93.7%for 280 cycles at 1 mA cm^(-2)and 1 mA h cm^(-2).The symmetrical cell using CoF_(2)@C-HS can stably cycle more than 1800 h with a low voltage hysteresis of 11 mV at a current density of 0.5 MA cm^(-2)and an areal capacity of 0.5 mA h cm^(-2).Moreover,the Li@CoF_(2)@C-HS composite anode enables more than 300 stable cycles at 1 C with a capacity retention of 95%in LiFePO_(4)-based full cell and 110 stable cycles at 1 C in LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based highvoltage full *** work might shed a new light on designing lithiophilic hosts to spatially confine LM deposition,realizing dendrite-free LM anodes and the practical applications of LM batteries.

关键词： Lithium metal anode Spatial deposition Stability Nanocomposite Lithiophilic CoF_(2)

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From Environmental Toxicants to Antibacterial Agents:BPA Analogues Selectively Inhibit the Growth of Gram-Positive Bacteria by Disturbing Biosynthesis of the Cell Wall

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Environment & Health 2023年第4期1卷 291-299页

作者： Huiming Cao Zhunjie Li Bolei Chen Jing Wang Zhen Zhou Zhi Li Yun Qian Yong Liang Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances School of Environment and HealthJianghan UniversityWuhan 430056P.R.China Department of Orthopedics General Hospital of Central Theater Command of Chinese People’s Liberation ArmyWuhan 430070P.R.China Department of Biomedical Engineering Florida International UniversityMiamiFlorida 33174United States

Remarkable antibacterial activity of BPA analogues especially for tetrabromobi-sphenol A against Staphylococcus aureus 25923(Sa25923)and methicillin-resistant Staphylococcus aureus(MRSA)has been reported in our previous ***,the toxic effects of the compounds as environmental contaminants on the endocrine system limited their applications in the field of medicine and *** the abuse of antibiotics has led to the emergence of multiple super-resistant bacteria,we considered that structural modifications based on the BPA structure will be available for molecular designing of potential antimicrobial agents without drug *** this study,to further improve the antibacterial activity and reduce the biological toxicity,we performed the computational models to evaluate the binding affinities of BPA analogues to the potential target DltA protein in the biosynthesis of cell wall.A series of synthesized achiral analogues ofα,α,α′-tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene(α,α,α′-TEIB)exhibited low minimum inhibitory concentration against Sa25923 and MRSA(2 or 1μg mL−1).Especially,the analogue A4 did not induce the drug-resistant mutants for all tested Gram-positive bacterial strains and exhibited relatively lower cytotoxicity in HepG2 *** developed classification model based on the light gradient boosting algorithm showed the superior performances on the internal robustness and generalization ability for the ligand-based virtual screening of bisphenol and polyphenol antimicrobial ***,our findings suggest that the molecular structure ofα,α,α′-TEIB is promising as a scaffold,which is expected to achieve a breakthrough in the development of antibiotics which can prevent the invasion of MRSA and other super bacteria.

关键词： Environmental toxicants Antibacterial agents BPA analogues Lipoteichoic acid Virtual screening Machine learning

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