BROWSE

Related Researcher

Author's Photo

Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications

ITEM VIEW & DOWNLOAD

Electrochemically Induced Crystallite Alignment of Lithium Manganese Oxide to Improve Lithium Insertion Kinetics for Dye-Sensitized Photorechargeable Batteries

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Electrochemically Induced Crystallite Alignment of Lithium Manganese Oxide to Improve Lithium Insertion Kinetics for Dye-Sensitized Photorechargeable Batteries
Author
Lee, Myeong-HeeKim, Byung-ManLee, YeongdaeHan, Hyun-GyuCho, MinjaeKwon, Tae-HyukSong, Hyun-Kon
Issue Date
2021-04
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v.6, no.4, pp.1198 - 1204
Abstract
The insertion of lithium into lithium manganese oxide spinel (LiMn2O4 (LMO) to Li2Mn2O4 (L2MO)) was used to store light energy as a form of chemical energy in a dye-sensitized photorechargeable battery (DSPB). Herein, we investigate the effect of crystallite size of LMO on DSPB performance. The crystallite size of graphene-wrapped sub-micrometer-sized LMO (LMO@Gn) was tuned electrochemically from 26 to 34 nm via repeated LMO-to-L2MO transitions. The different crystallite orientations in LMO@Gn particles were ordered in an identical direction by an electric stimulus. The LMO@Gn having a 34 nm crystallite size (L-34 and L-34*) improved DSPB performances in dim light, compared with the smaller-crystallite LMO@Gn (L-26). The overall energy efficiency (eta(overall)) of 13.2%, higher than ever reported, was achieved by adopting the fully crystallized and structure-stabilized LMO@Gn (L-34*) for DSPB. The phase transition between the cubic and tetragonal forms during the LMO-to-L2MO reaction was suspected to be responsible for the structural ordering.
URI
https://scholarworks.unist.ac.kr/handle/201301/53011
URL
https://pubs.acs.org/doi/10.1021/acsenergylett.0c02473
DOI
10.1021/acsenergylett.0c02473
ISSN
2380-8195
Appears in Collections:
CHM_Journal Papers
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU