High areal capacity for battery anode using rapidly growing self-ordered TiO2 nanotubes with a high aspect ratio

作者：Pervez Syed; Kim Doohun^*; Doh Chil Hoon; Farooq Umer; Yaqub Adnan; Choi Jeong Hee; Lee You Jin; Saleem Mohsin

来源：Materials Letters, 2014, 137: 347-350.

DOI：10.1016/j.matlet.2014.09.032

• Nanotubes
• Areal capacity
• Anodization
• Anode
• Li-ion battery

Highly scalable and fast grown TiO2 nanotube layers (TNTs) were utilized as a binder and conductive agent free anode for Li-ion battery (LIB) to obtain high areal capacity. To synthesize the TNTs, a simple electrochemical anodization was carried out in an electrolyte containing lactic acid as an additive. Lactic acid assisted in obtaining nanotube layers of greater length in a very short time with a strong adherence to the Ti substrate. Results showed that the variation in the aspect ratio of the TNTs has a significant impact on the electrochemical performance of the anode material in terms of areal charge/discharge capacity, i.e., longer the length and wider the diameter of the nanotube, higher the capacity and vice versa. For TNTs with a length of up to 38 mu m, a high areal capacity of ca. 1000 mu A h cm(-2) was achieved after 100 charge/discharge cycles.

• 出版日期2014-12-15