期刊
MATERIALS RESEARCH BULLETIN
卷 58, 期 -, 页码 74-77出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2014.02.024
关键词
Oxides; X-ray diffraction; Electrochemical properties; Energy storage; Ionic conductivity
资金
- Human Resource Training Project for Regional Innovation through the National Research Foundation of Korea (NRF) by the Ministry of Education (MOE)
- National Research Foundation of Korea (NRF) by the Ministry of Science, ICT & Future Planning (MSIP) [2012R1A2A2A02015831, 2013R1A2A1A01015911, 2012R1A2A1A01006546]
- National Research Foundation of Korea [2012R1A2A1A01006546, 2012R1A2A2A02015831] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Pure ce-NaMnO2 cathode materials were prepared by solid-state reaction with Mn2O3 and Na2CO3 at 750 degrees C. Electrochemical properties of Na/alpha-NaMnO2 battery was investigated with electrolytes as 1 M NaCIO4 EC/DEC and 1 M NaBF4TEGDME. First discharge capacity of Na/alpha-NaMnO2 cell using 1 M NaC104 EC/DEC electrolyte and 1 M NaBEI TEGDME electrolyte was 146 mAh g(-1) and 136 mAh g(-1) discharge capacity for the first cycle at 0.2 C rate and 104 mAh g(-1), 97 rnAh r1 after 20 cycles, respectively. Na! et-NaMn02 battery with 1 M NaCIO4 EC/DEC electrolyte shows higher initial charge/discharge capacity than that using 1 M NaBF4 TEGDME because of high ionic conductivity of electrolyte and low interfacial resistance between the electrolyte and electrode. However, Na/or-NaMnO2 battery with 1 M NaBF4 TEGDME electrolyte has better stability for the 20th cycle from coulombic efficiency result because of stability of interfacial resistance. (C) 2014 Elsevier Ltd. All rights reserved.
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