维普中文期刊产品整合服务

Tuning the nucleation and decomposition of Li2O_(2) by fluorine-doped carbon vesicles towards high performance Li-O_(2) batteries

查看全文 作　　者：Shiyu [1]Ma;Hongchang [1]Yao;Zhongjun [1]Li;Qingchao [1]Liu 高影响力作者 机构地区：[1]Green Catalysis Center,and College of Chemistry,Zhengzhou University,Zhengzhou 450001,Henan,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2022年第31卷第7期,共10页高影响力期刊 基　　金：financially supported by the National Natural Science Foundation of China(Grant No.21701145);the China Postdoctoral Science Foundation(Grant Nos.2017M610459,2018T110739)。 摘　　要：Li-O_(2) batteries provide an attractive and potential strategy for energy conversion and storage with high specific energy densities.However,large over-potential in oxygen evolution reactions (OER) caused by the decomposition obstacles of Li_(2)O_(2) seriously impedes its electrochemical performances.Herein,a novel N,O,S and F co-doping vesicular carbon was prepared by self-template pyrolysis method and used in LiO_(2) battery to tune the nucleation and decomposition of Li_(2)O_(2).The introduction of F in the carbon matrix with suitable content can regulate the adsorption of intermediates,through which the morphology of Li_(2)O_(2) can be controlled to film,favorable to its decomposition in charge process.The cathode based on the optimized F doped carbon vesicle exhibits improved electrochemical performances including a low over-potential,large capacity and a long-term stability.Density functional theory (DFT) results show that F and C in C–F bond hasve a strong interaction to Li and O in Li_(2)O_(2),respectively,which can enhance the transfer of electrons from Li_(2)O_(2) to the carbon matrix to generate hole polaron and thus accelerate the delithiation and decomposition of Li_(2)O_(2).This work provides a new sight into understanding the mechanism of nucleation and decomposition of Li_(2)O_(2) for the development of high-performance Li-O_(2) batteries. 关 键 词：Li-O_(2)batteries F-doped carbon vesicles DFT Li2O_(2)nucleation and decomposition
相关文献

参考文献(51)

引证文献(4)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费