Ultrafast Nanocrystalline-TiO2 (B)/Carbon Nanotube Hyperdispersion Prepared via Combined Ultracentrifugation and Hydrothermal Treatments for Hybrid Supercapacitors

Katsuhiko Naoi; Takayuki Kurita; Masayuki Abe; Takumi Furuhashi; Yuta Abe; Keita Okazaki; Junichi Miyamoto; Etsuro Iwama; Shintaro Aoyagi; Wako Naoi; Patrice Simon

doi:10.1002/adma.201600798

Ultrafast Nanocrystalline-TiO2 (B)/Carbon Nanotube Hyperdispersion Prepared via Combined Ultracentrifugation and Hydrothermal Treatments for Hybrid Supercapacitors

Adv Mater. 2016 Aug;28(31):6751-7. doi: 10.1002/adma.201600798. Epub 2016 May 27.

Authors

Katsuhiko Naoi^{1

2

3

4}, Takayuki Kurita¹, Masayuki Abe¹, Takumi Furuhashi¹, Yuta Abe¹, Keita Okazaki¹, Junichi Miyamoto^{1

3

4}, Etsuro Iwama^{1

4}, Shintaro Aoyagi¹, Wako Naoi², Patrice Simon^{4

5

6}

Affiliations

¹ Department of Applied Chemistry, Tokyo University of Agriculture & Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8558, Japan.
² Division of Art and Innovative Technologies, K & W Inc., 1-3-16-901 Higashi, Kunitachi, Tokyo, 186-0002, Japan.
³ Advanced Capacitor Research Center, Tokyo University of Agriculture & Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8558, Japan.
⁴ Global Innovation Research Organization, Tokyo University of Agriculture & Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8558, Japan.
⁵ CIRIMAT, Université de Toulouse, CNRS, INPT, UPS, 118 route de Narbonne, Toulouse, 31062, Cedex 9, France.
⁶ Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS, 3459, France.

PMID: 27229372
DOI: 10.1002/adma.201600798

Abstract

Anisotropically grown (b-axis short) single-nano TiO2 (B), uniformly hyper-dispersed on the surface of multiwalled carbon nanotubes (MWCNT), was successfully synthesized via an in situ ultracentrifugation (UC) process coupled with a follow-up hydrothermal treatment. The uc-TiO2 (B)/MWCNT composite materials enable ultrafast Li(+) intercalation especially along the b-axis, resulting in a capacity of 235 mA h g(-1) per TiO2 (B) even at 300C (1C = 335 mA g(-1) ).

Keywords: TiO2(B); high rate performance; hyperdispersion; ultrashort b-axis.