A high rate performance positive composite electrode using a high P/S ratio and LiI composite solid electrolyte for an all-solid-state Li–S battery
A high rate performance positive composite electrode using a high P/S ratio and LiI composite solid electrolyte for an all-solid-state Li–S battery
复制标题
用于全固态锂硫电池的高倍率性能正极复合电极，采用高P/S比和LiI复合固体电解质
DOI：
10.1016/j.jpowsour.2020.227905
复制
发表时间：
2020
影响因子：
9.2
通讯作者：
J. Akimoto
中科院分区：
文献类型：
--
作者：
H. Nagata;Y. Chikusa;J. Akimoto
全固态锂硫电池被认为具有足够的能量密度成为下一代电池。在制造电池时，需要提高正极中的硫反应性和离子传导性。在本研究中，我们研究了（100 − x）（Li1.6PS2）·x（LiI）作为具有高P/S比固体电解质和LiI的复合固体电解质，以提供高硫活化性能和高离子导电性的双重功能。该固体电解质在x = 35时显示出超过0.5mS cm-1的高离子电导率。使用65Li1.6PS2·35LiI的正极复合材料在6.4 mA cm − 2（0.8 C）和25 ° C下表现出超过1260 mA h g − 1（硫）的良好高倍率容量。此外，它在45 ° C下显示出优异的电池性能。在1000 mA h g − 1下的高倍率容量为25.5 mA cm − 2（3.2 C），100次循环后的1 C循环容量超过1230 mA h g − 1。
All-solid-state lithium–sulfur batteries are believed to have sufficient energy density to be next-generation batteries. In manufacturing the batteries, it is necessary to improve the sulfur reactivity and ion conductivity in the positive electrode. In this study, we investigated (100− x) (Li1.6PS2)·x (LiI) as a composite solid electrolyte with a high P/S ratio solid electrolyte and LiI to provide the dual functions of high sulfur activated property and high ionic conductivity. This solid electrolyte showed high ionic conductivity of over 0.5 mS cm−1at over x = 35. The positive composite electrode using 65Li1.6PS2·35LiI exhibited a good high rate capacity of over 1260 mA h g−1(sulfur) at 6.4 mA cm−2(0.8 C) and 25 °C. Furthermore, it showed excellent battery performance at 45 °C. The high rate capacity was 25.5 mA cm−2(3.2 C) over 1000 mA h g−1, and the 1 C cycle capacity was over 1230 mA h g−1after 100 cycles.
影响因子：
3.2
作者：
T. Ohtomo;Fuminori Mizuno;A. Hayashi;K. Tadanaga;M. Tatsumisago
通讯作者：
T. Ohtomo;Fuminori Mizuno;A. Hayashi;K. Tadanaga;M. Tatsumisago