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Facile synthesis and performance of NASICON Li1+xAlxGe2-x(PO4)3 electrolytes for all solid state lithium-ion battery
Solid State Ionics ( IF 3.2 ) Pub Date : 2020-09-19 , DOI: 10.1016/j.ssi.2020.115454
Erqing Zhao , Yudi Guo , Yuan Xin , Guangri Xu

Nasicon-type Li1+xAlxGe2-x(PO4)3 (x = 0–0.5) electrolytes have been prepared via a facile and economic method. All synthetic electrolyte samples show Nasicon structure and good crystallinity. The Al doping content has a great influence on the electrical conductivity of electrolyte. The electrolyte with the composition of Li1.4Al0.4Ge1.6(PO4)3 exhibits a highest electrical conductivity of 2.72 × 10−4 S/cm at room temperature, which is mainly attributable to fewer impurity and dense electrolyte structure. The LiFePO4/Li cell assembled with this electrolyte delivers an initial specific discharge capacity of 127.86 mAh g−1 at a charge/discharge current density of 0.5C at 60 °C, which shows an excellent cycling performance with high discharge capacity of 131.2 mAhg−1 after 150 cycles. These results suggest that the Li1.4Al0.4Ge1.6(PO4)3 electrolyte is a potential electrolyte for all solid state lithium-ion battery.



中文翻译:

适用于全固态锂离子电池的NASICON Li 1 + x Al x Ge 2-x(PO 43电解质的简便合成和性能

Nasicon型Li 1 + x Al x Ge 2-x(PO 43(x = 0-0.5)电解质是通过一种简便而经济的方法制备的。所有合成电解质样品均显示Nasicon结构和良好的结晶度。Al的掺杂量对电解液的导电性有很大的影响。组成为Li 1.4 Al 0.4 Ge 1.6(PO 43的电解质 在室温下具有2.72×10 -4 S / cm的最高电导率,这主要归因于较少的杂质和致密的电解质结构。LiFePO 4组装有这种电解质的/ Li电池在60°C下以0.5C的充电/放电电流密度提供的初始比放电容量为127.86 mAh g -1,这显示出出色的循环性能,经过131.2 mAhg -1的高放电容量150个循环。这些结果表明,Li 1.4 Al 0.4 Ge 1.6(PO 43电解质是所有固态锂离子电池的潜在电解质。

更新日期:2020-09-20
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