Gel polymer electrolytes(GPEs)have shown great potential to improve the safety and performance of lithium metal batteries(LMBs),offering benefits such as improved mechanical properties,uniform lithium deposition,suppr...Gel polymer electrolytes(GPEs)have shown great potential to improve the safety and performance of lithium metal batteries(LMBs),offering benefits such as improved mechanical properties,uniform lithium deposition,suppression of dendrite growth,and minimized electrolyte leakage.Nonetheless,several challenges persist,including the solid electrolyte interphase(SEI)instability,suboptimal ionic conductivity,inherent flammability,and an inability to operate at high voltage,significantly hindering their long-term stability and capacity retention.Given fluorine atoms'small atomic radius and high electronegativity,fluorinated gel electrolytes(FGPEs)offer distinct advantages in mitigating these challenges.This review systematically examines the role of fluorine in enhancing the performance of GPEs,with particular emphasis on fluorine's role in improving the SEI composition in GPEs.Additionally,the review elucidates the mechanism of thermal runaway in LMBs and investigates fluorine's contribution to enhancing the flame retardancy of these batteries.The article also details the role of fluorinated components in facilitating lithium-ion transport and evaluates the suitability of fluorinated gel polymer electrolytes for highvoltage applications.Finally,the review elaborates on design strategies for advancing FGPEs and underscores their potential to address critical challenges in lithium metal battery technology.展开更多
Objective: to investigate the effect of fluoride containing gel on preventing enamel demineralization and improving enamel lesion during orthodontic treatment. Methods: 60 patients were randomly divided into reference...Objective: to investigate the effect of fluoride containing gel on preventing enamel demineralization and improving enamel lesion during orthodontic treatment. Methods: 60 patients were randomly divided into reference group and study group (30 patients in each group) and received orthodontic treatment in our hospital from July 2020 to July 2021. After orthodontic treatment, the patients in the reference group were instructed to apply fluoride toothpaste. The patients in the research group were treated with fluoride gel smearing once a month on the basis of fluoride toothpaste. Then, the probability of enamel demineralization was compared and the impact on the degree of enamel damage was analyzed. Results: there was no significant difference between the clinical efficacy A and the study group (P>0.05). After 6 and 12 months of treatment, the incidence of enamel demineralization, enamel demineralization index, DD detection value, and the degree of enamel damage in the study group were lower than those in the reference group, and the teeth masticatory efficiency and tooth beauty scores were higher than those in the reference group, with statistical significance (P〈0.05). Conclusion: the application of fluoride containing gel in orthodontic treatment can not only effectively prevent the occurrence of enamel demineralization, but also reduce the degree of enamel damage, and promote the improvement of chewing efficiency and aesthetics of teeth. It is worth further application and promotion.展开更多
基金supported by the Key Research and Development Program of Shaanxi Province(2024PT-ZCK-82)the Basic Strengthening Program(2022-JCJQ-JJ-0278)the National Natural Science Foundation of China(52105587)。
文摘Gel polymer electrolytes(GPEs)have shown great potential to improve the safety and performance of lithium metal batteries(LMBs),offering benefits such as improved mechanical properties,uniform lithium deposition,suppression of dendrite growth,and minimized electrolyte leakage.Nonetheless,several challenges persist,including the solid electrolyte interphase(SEI)instability,suboptimal ionic conductivity,inherent flammability,and an inability to operate at high voltage,significantly hindering their long-term stability and capacity retention.Given fluorine atoms'small atomic radius and high electronegativity,fluorinated gel electrolytes(FGPEs)offer distinct advantages in mitigating these challenges.This review systematically examines the role of fluorine in enhancing the performance of GPEs,with particular emphasis on fluorine's role in improving the SEI composition in GPEs.Additionally,the review elucidates the mechanism of thermal runaway in LMBs and investigates fluorine's contribution to enhancing the flame retardancy of these batteries.The article also details the role of fluorinated components in facilitating lithium-ion transport and evaluates the suitability of fluorinated gel polymer electrolytes for highvoltage applications.Finally,the review elaborates on design strategies for advancing FGPEs and underscores their potential to address critical challenges in lithium metal battery technology.
文摘Objective: to investigate the effect of fluoride containing gel on preventing enamel demineralization and improving enamel lesion during orthodontic treatment. Methods: 60 patients were randomly divided into reference group and study group (30 patients in each group) and received orthodontic treatment in our hospital from July 2020 to July 2021. After orthodontic treatment, the patients in the reference group were instructed to apply fluoride toothpaste. The patients in the research group were treated with fluoride gel smearing once a month on the basis of fluoride toothpaste. Then, the probability of enamel demineralization was compared and the impact on the degree of enamel damage was analyzed. Results: there was no significant difference between the clinical efficacy A and the study group (P>0.05). After 6 and 12 months of treatment, the incidence of enamel demineralization, enamel demineralization index, DD detection value, and the degree of enamel damage in the study group were lower than those in the reference group, and the teeth masticatory efficiency and tooth beauty scores were higher than those in the reference group, with statistical significance (P〈0.05). Conclusion: the application of fluoride containing gel in orthodontic treatment can not only effectively prevent the occurrence of enamel demineralization, but also reduce the degree of enamel damage, and promote the improvement of chewing efficiency and aesthetics of teeth. It is worth further application and promotion.
