<P>Li was incorporated into transition metal layers of Ni-rich Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> by formation of a solid solution with Li<SUB>2</SUB>MnO<SUB>3</SUB> (l...
http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
https://www.riss.kr/link?id=A107517545
2015
-
SCI,SCIE,SCOPUS
학술저널
2313-2318(6쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Li was incorporated into transition metal layers of Ni-rich Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> by formation of a solid solution with Li<SUB>2</SUB>MnO<SUB>3</SUB> (l...
<P>Li was incorporated into transition metal layers of Ni-rich Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> by formation of a solid solution with Li<SUB>2</SUB>MnO<SUB>3</SUB> (layer notation: Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB>), which can be denoted as (1-<I>x</I>)Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> – <I>x</I>Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB>, to understand the effect of Li on the structure, electrochemistry and thermal characteristic of the cathode. Structural analysis data obtained by Rietveld refinement of X-ray diffraction data indicate that the additional Li can be found in the transition metal layers of (1-<I>x</I>)Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> – <I>x</I>Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB>. An interesting feature is that the average oxidation states of Ni and Mn are 3+ and 4+, respectively, for (1-<I>x</I>)Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> – <I>x</I>Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB> as demonstrated by X-ray absorption study. The first discharge capacity was approximately 217 mAh g<SUP>−1</SUP>, and the resulting retention was above 90% for 0.9Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> – 0.1Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB> (Li[Li<SUB>0.033</SUB>Ni<SUB>0.855</SUB>Co<SUB>0.045</SUB>Mn<SUB>0.067</SUB>]O<SUB>2</SUB>) in the range of 2.7 to 4.5 V for 100 cycles, which is a surprising result for Ni-rich compounds. Moreover, the thermal stability of (1-<I>x</I>)Li[Ni<SUB>0.95</SUB>Co<SUB>0.05</SUB>]O<SUB>2</SUB> – <I>x</I>Li[Li<SUB>0.33</SUB>Mn<SUB>0.67</SUB>]O<SUB>2</SUB> was significantly improved over the cathodes with identical Ni fraction. These results highlight the role of tetravalent Mn ions, even in small amounts, in stabilizing the electrochemical performances and thermal properties in the Ni-rich layer cathodes.</P>
Pd3Co/MWCNTs Composite Electro-Catalyst Cathode Material for Use in Lithium-Oxygen Batteries