用AlO/MoS/AlO修饰的TiO纳米管层作为具有增强循环稳定性的锂离子微型电池的阳极。

TiO Nanotube Layers Decorated with AlO/MoS/AlO as Anode for Li-ion Microbatteries with Enhanced Cycling Stability.

作者信息

Tesfaye Alexander Teklit, Sopha Hanna, Ayobi Angela, Zazpe Raul, Rodriguez-Pereira Jhonatan, Michalicka Jan, Hromadko Ludek, Ng Siowwoon, Spotz Zdenek, Prikryl Jan, Macak Jan M, Djenizian Thierry

机构信息

Mines Saint-Etienne, Center of Microelectronics in Provence, Flexible Electronics Department, 13541 Gardanne, France.

Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice, Nam. Cs. Legii 565, 53002 Pardubice, Czech Republic.

出版信息

Nanomaterials (Basel). 2020 May 17;10(5):953. doi: 10.3390/nano10050953.

DOI:10.3390/nano10050953

PMID:32429573

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7279526/

Abstract

TiO nanotube layers (TNTs) decorated with AlO/MoS/AlO are investigated as a negative electrode for 3D Li-ion microbatteries. Homogenous nanosheets decoration of MoS, sandwiched between AlO coatings within self-supporting TNTs was carried out using atomic layer deposition (ALD) process. The structure, morphology, and electrochemical performance of the AlO/MoS/AlO-decorated TNTs were studied using scanning transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and chronopotentiometry. AlO/MoS/AlO-decorated TNTs deliver an areal capacity almost three times higher than that obtained for MoS-decorated TNTs and as-prepared TNTs after 100 cycles at 1C. Moreover, stable and high discharge capacity (414 µAh cm) has been obtained after 200 cycles even at very fast kinetics (3C).

摘要

对用AlO/MoS/AlO修饰的TiO纳米管层（TNTs）作为三维锂离子微电池的负极进行了研究。利用原子层沉积（ALD）工艺，在自支撑TNTs的AlO涂层之间夹入了均匀的MoS纳米片装饰。使用扫描透射电子显微镜、能量色散X射线光谱、X射线光电子能谱和计时电位法研究了AlO/MoS/AlO修饰的TNTs的结构、形态和电化学性能。在1C下循环100次后，AlO/MoS/AlO修饰的TNTs的面积容量几乎是MoS修饰的TNTs和制备的TNTs的三倍。此外，即使在非常快的动力学条件下（3C），在200次循环后也获得了稳定且高的放电容量（414 µAh cm）。