Synthesis and electrochemical characteristics of spherical li4ti5o12/CNT composite materials for hybrid capacitors

Joeng Jin Yang, Yu Ri Kim, Moon Gook Jeong, Yong Jae Yuk, Han Joo Kim, Soo Gil Park

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

Spherical Li4Ti5O12 and Li4Ti5O12 carbon nanotube (CNT) composites were synthesized using a colloid system. The electrochemical properties of the composites were thoroughly examined to determine their applicability as hybrid capacitor anodes. The electrical conductivity of the spherical Li4Ti5O12-CNT composite was improved over that of the spherical Li4Ti5O12 composite. The synthesized composites were utilized as the anode of a hybrid capacitor, which was assembled with an activated carbon (AC) positive electrode. The CNTs attached on the spherical Li4Ti5O12 particles contributed to a 51% reduction of the equivalent series of resistance of the Li4Ti5O12-CNTs/AC hybrid capacitor compared to the Li4Ti5O12/ AC hybrid capacitor. Moreover, the Li4Ti5O12-CNTs/AC hybrid capacitor showed a larger capacitance than the Li4Ti5O12/ AC hybrid capacitor; specifically, the Li4Ti5O12-CNT/AC hybrid capacitor showed 1.6 times greater capacitance at 40 cycles with a 10 mA cm-2 loading current density.

Original languageEnglish
Pages (from-to)59-64
Number of pages6
JournalJournal of Electrochemical Science and Technology
Volume6
Issue number2
DOIs
Publication statusPublished - 2015 Jun 1

Keywords

  • LiTiO-cnt composite
  • LiTiO/AC hybrid capacitors
  • Spherical LiTiO

ASJC Scopus subject areas

  • Electrochemistry

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