電化學自組裝Fe/Cu納米復合材料對鐵鎳電池高倍率及低溫性能改性(英文)
發(fā)布時間:2021-06-07 03:00
通過在堿液中陰極還原鐵酸銅(t-CuFe2O4)簡便地實現(xiàn)了納米Fe/Cu復合材料的自組裝。采用循環(huán)伏安(CV)與X射線衍射(XRD)分析了自組裝過程中的相變。通過透射電鏡(TEM)、選區(qū)電子衍射(SAED)以及掃描透射-能譜分析(STEM-EDX)的表征可以發(fā)現(xiàn)電結(jié)晶得到的鐵、銅納米顆粒分布均勻且接觸緊密。當用于鐵鎳電池負極時,Fe/Cu納米復合電極展現(xiàn)了較好的放電容量與充電接收能力,并具備優(yōu)異的高倍率與低溫性能。當電流密度高達4 500 m A·gFe-1或運行溫度僅為-40℃時,該電極仍擁有很好的輸出容量與電位特性。線性掃描伏安(LSV)分析證明了該電極中原位生成的Cu納米顆粒催化了活性Fe的陽極溶解動力學性能,因而明顯改善了電極的高倍率與低溫放電性能。
【文章來源】:無機化學學報. 2017,33(05)北大核心SCICSCD
【文章頁數(shù)】:8 頁
【文章目錄】:
1 Experimental
1.1 Syntheses of t-Cu Fe2O4
1.2 Self-assembly and characterization of Fe/Cu nano-composite electrode
1.3 Electrochemical measurements of Fe/Cu nano-composite electrode
2 Results and discussion
2.1 Self-assembly of Fe/Cu nanocomposite electrode from t-Cu Fe2O4
2.2 Electrochemical performances of Fe/Cu nano-composite electrode
2.3 Anodic kinetics of Fe/Cu nano-composite electrode
3 Conclusions
本文編號:3215712
【文章來源】:無機化學學報. 2017,33(05)北大核心SCICSCD
【文章頁數(shù)】:8 頁
【文章目錄】:
1 Experimental
1.1 Syntheses of t-Cu Fe2O4
1.2 Self-assembly and characterization of Fe/Cu nano-composite electrode
1.3 Electrochemical measurements of Fe/Cu nano-composite electrode
2 Results and discussion
2.1 Self-assembly of Fe/Cu nanocomposite electrode from t-Cu Fe2O4
2.2 Electrochemical performances of Fe/Cu nano-composite electrode
2.3 Anodic kinetics of Fe/Cu nano-composite electrode
3 Conclusions
本文編號:3215712
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