期刊
ELECTROCHIMICA ACTA
卷 170, 期 -, 页码 25-32出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.04.113
关键词
Ti2O3; nanosheet; high energy milling; anode; lithium ion battery
资金
- National Research Foundation of Korea (NRF) grant - Korea government (MEST) [2012R1A2A2A01045382]
- Korea Small and Medium Business Administration [S2230272]
- R&D Center for Valuable Recycling(Global-Top R&BD Program) of the Ministry of Environment [2014001170002]
- Korea Technology & Information Promotion Agency for SMEs (TIPA) [S2230272] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012R1A2A2A01045382] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
For the first time, the basic electrochemical properties and battery performances of titanium(III) oxide (Ti2O3) are reported in bulk and nanoscale powder forms in view of their potential applications for lithium ion battery electrodes. Ti2O3 reacts electrochemically with Li+ ions between 3.0 V and 0.01 V, and exhibits excellent cycling stability due to its relatively high electrical conductivity. Reactions between Li+ ions and Ti2O3 molecules are shown to proceed via intercalation of the former into the latter. To increase the electrochemical reactivity of Ti2O3, nanoscale Ti2O3 particles with and without graphene were prepared using a facile high-energy milling process. After milling, the specific discharge capacity of the nanoscale Ti2O3 with nanosheet morphology was 161 mA.h.g(-1) at the 300th cycle at a current density of 33 mA.g(-1). By combining graphene on the Ti2O3 nanosheets uniformly, the specific capacity was further improved to 248 mA.h.g(-1) at the 300th cycle. Furthermore, rate capability of these composite electrodes was enhanced significantly even at high current rates. (C) 2015 Elsevier Ltd. All rights reserved.
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