Spinel lithium manganese oxide synthesized under a pressurized oxygen atmosphere

Title
Spinel lithium manganese oxide synthesized under a pressurized oxygen atmosphere
Author
선양국
Keywords
Pressurize; Spinel; Oxygen deficiency; Positive electrode; Lithium; Battery
Issue Date
2010-12-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v. 55, no. 28, page. 8397-8401
Abstract
Spinel lithium manganese oxide was synthesized via co-precipitation The prepared lithium manganese oxide powder was further heated at 700 degrees C for 15 h under pressurized (3 bar) oxygen atmosphere The resultant exhibited a highly crystalline cubic spinel phase with space group Fd3m as confirmed by X-ray diffraction The spinel compound exhibited a slightly smaller lattice constant than a conventional spinel compound even though the cationic ratio of Li/Mn is the same for both compounds Chemical titration of the Mn component showed that heat treatment under a 3 bar oxygen atmosphere resulted in slightly higher average Mn oxidation state indicating that the amount of Mn4(+) increased after the treatment The Li(1 05)Mn(1 95)O(3 99) electrode exhibited improved cycling performance namely 96 3% of capacity retention during 100 cycles at elevated temperature (60 C) The details of the structure and electrochemistry of the electrode are discussed (C) 2010 Elsevier Ltd All rights reserved
URI
http://repository.hanyang.ac.kr/handle/20.500.11754/79822https://linkinghub.elsevier.com/retrieve/pii/S0013468610009977
ISSN
0013-4686
DOI
10.1016/j.electacta.2010.07.051
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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