TiO2-reduced graphene oxide nanocomposites by microwave-assisted forced hydrolysis as excellent insertion anode for Li-ion battery and capacitor

Hyun Kyung Kim, Dattakumar Mhamane, Myeong Seong Kim, Ha Kyung Roh, Vanchiappan Aravindan, Srinivasan Madhavi, Kwang Chul Roh, Kwang Bum Kim

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

TiO2-reduced graphene oxide (rGO) nanocomposite (TiO2-rGO) is fabricated by microwave-assisted forced hydrolysis and examined as prospective electrode for energy storage applications, especially in Li-ion battery (LIB) and Li-ion capacitor (LIC). First, the uniformly distributed nanoscopic TiO2 particulates (∼3 nm) over rGO nanosheets is evaluated as anode in half-cell assembly to ascertain the Li-insertion behavior and found that ∼0.68 mol Li (∼227 mAh g−1) is reversible. Then, “rocking-chair” type LIB is fabricated with spinel LiMn2O4 cathode, and the LiMn2O4/TiO2-rGO assembly exhibits high capacity (∼120 mAh g−1 at 0.1 C rate), good rate capability (∼53 mAh g−1 at 1 C rate), and excellent cycleability (∼90% initial reversible capacity after 1000 cycle) as well. Similarly, the LIC is also constructed with activated carbon cathode, and such configuration delivered a maximum energy density of ∼50 Wh kg−1 with ∼82% retention after 4000 cycles. The synergistic effect of both rGO and anatase nanoparticles provides excellent energy efficiency and battery performance in different kind of Li-ion based energy storage devices.

Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalJournal of Power Sources
Volume327
DOIs
Publication statusPublished - 2016 Sep 30

Bibliographical note

Funding Information:
This work was supported by an Energy Efficiency and Resources grant (No. 20122010100140) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), funded by the Ministry of Knowledge Economy, Korean government. This work was also supported by the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (NRF-2011-0030542)

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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