<P>A simple synthesis procedure for solid-state reactions at an intermediate temperature (500°C) is applied to synthesize F-doped spinel-layered 0.5Li<SUB>2</SUB>MnO<SUB>3</SUB>•0.5Li<SUB>4</SUB>...
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https://www.riss.kr/link?id=A107440349
2019
-
SCI,SCIE,SCOPUS
학술저널
1568-1573(6쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>A simple synthesis procedure for solid-state reactions at an intermediate temperature (500°C) is applied to synthesize F-doped spinel-layered 0.5Li<SUB>2</SUB>MnO<SUB>3</SUB>•0.5Li<SUB>4</SUB>...
<P>A simple synthesis procedure for solid-state reactions at an intermediate temperature (500°C) is applied to synthesize F-doped spinel-layered 0.5Li<SUB>2</SUB>MnO<SUB>3</SUB>•0.5Li<SUB>4</SUB>Mn<SUB>5</SUB>O<SUB>12</SUB> (Li<SUB>3</SUB>Mn<SUB>3</SUB>O<SUB>7.5-</SUB><I><SUB>x</SUB></I>F<I><SUB>x</SUB></I> with <I>x</I> = 0, 0.05, 0.1, and 0.2). The F-doping does not affect the crystal structure or the morphology of the pristine sample. However, F-doping increases the Mn<SUP>3+</SUP> content, leading to an improved electronic conductivity and a lower charge-transfer resistance. In addition, F-doping also reduces the difference of voltage between the oxidation and reduction processes, and enhances the Li<SUP>+</SUP> diffusion coefficient (with a maximum four times higher than that of the pristine sample). Consequently, the capacity and rate capability of the cathode are improved by F-doping (the <I>x</I> = 0.1 sample can provide a high capacity of 300 mAh g<SUP>−1</SUP> at C/10).</P>