Trang trí các hạt nanoparticle oxit coban/sắt trên nanosheet carbon N-dop: Hiệu suất điện hóa cho pin lithium-ion

Journal of Applied Electrochemistry - Tập 49 - Trang 433-442 - 2019
Muhammad Kashif Aslam1, Syed Shoaib Ahmad Shah2, Tayyaba Najam2, Sha Li1, ChangGuo Chen1
1College of Chemistry and Chemical Engineering, Chongqing University, Chongqing, People’s Republic of China
2Department of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, Pakistan

Tóm tắt

Các hạt nanoparticle oxit coban/sắt (CFO/NPs) được chế tạo bằng phương pháp đốt cháy rắn dễ dàng và trang trí lên các nanosheet carbon N-dop có nguồn gốc từ polyanilin. Các nanosheet carbon N-dop cung cấp một con đường cho quá trình chuyển giao điện tích và đóng vai trò là lớp bảo vệ để tránh sự agglomeration của các hạt nanoparticle. Việc trang trí các hạt nanoparticle CFO lên các nanosheet carbon N-dop xốp (CFO/NC) thường dẫn đến vật liệu lai có hiệu suất điện hóa đặc biệt cao cho pin Li-ion (LIBs) với khả năng khuếch tán ion điện phân tuyệt vời và đảm bảo quá trình vận chuyển nhanh chóng Li+/e−. Khả năng xả ban đầu đạt tới 1270 mAh g−1 (1.65 mAh cm−2) tại mật độ dòng điện 500 mA g−1 (0.65 mA cm−2). Hơn nữa, nó cũng thể hiện một dung lượng riêng đặc biệt cao là 635 mAh g−1 tại mật độ dòng điện cao 500 mA g−1 (500 mA g−1) sau khi chu trình lâu dài (250 chu kỳ) và khả năng tỷ lệ đáng kể với 93% khả năng giữ lại. Những đặc điểm điện hóa xuất sắc này minh chứng rằng CFO/NC là một vật liệu anot triển vọng cho LIBs.

Từ khóa

#Cobalt/Iron Oxide Nanoparticles #N-doped Carbon Nanosheets #Lithium-Ion Batteries #Electrode Performance #Charge Transfer

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