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Chuẩn bị vật liệu anode TiO2 nhiễm Sn dạng nano rỗng cho pin lithium-ion bằng phương pháp tách hợp kim đơn giản
Tóm tắt
Composite TiO2 nhiễm Sn dạng nano rỗng (NP-TiO2/Sn) đã được chế tạo thành công bằng cách ăn mòn các dải hợp kim ba thành phần AlTiSn trong dung dịch NaOH ở nhiệt độ phòng. Composite NP-TiO2/Sn thể hiện cấu trúc xốp 3D đi kèm với các nanowire. Bên cạnh đó, các hạt nano Sn được nhúng vào các dây chằng của TiO2 vô định hình. Nhờ vào cấu trúc phân cấp độc đáo và sự thêm vào của Sn, composite NP-TiO2/Sn thể hiện khả năng nạp tốt hơn và tuổi thọ chu trình dài hơn so với thành phần không có Sn. Hơn nữa, nó còn thể hiện tuổi thọ chu trình tốt và hiệu suất coulomb ở cả mật độ dòng thấp và cao. Khi tỷ lệ nguyên tử của Ti và Sn là 9:1, khả năng xả và hiệu suất chu trình tốt nhất được thể hiện. Sau 300 chu trình tuần hoàn ở 1 A g−1, composite NP-TiO2/Sn cho thấy khả năng cao, gấp đôi so với NP-TiO2 tinh khiết. Hiệu suất điện hóa tốt và quy trình dễ dàng hỗ trợ khả năng áp dụng thực tiễn làm vật liệu anode cho các pin lithium-ion.
Từ khóa
#Nano rỗng; TiO2; Nhiễm Sn; Pin lithium-ion; Hợp kim AlTiSn; Hiệu suất điện hóaTài liệu tham khảo
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