Synthesis of Br-rich argyrodite electrolytes enables all-solid-state batteries with superior battery performances at different operating temperatures
发布时间：2022-12-26
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- 论文类型：
- 期刊论文
- 发表刊物：
- Materialia
- 所属单位：
- 华中科技大学电气与电子工程学院
- 刊物所在地：
- 荷兰
- 学科门类：
- 工学
- 一级学科：
- 材料科学与工程
- 文献类型：
- J
- 卷号：
- 26
- 页面范围：
- 101603-101609
- ISSN号：
- 101603
- 关键字：
- Bromine-rich Lithium argyrodites Electrochemical performances Solid-state batteries Different operating temperatures
- DOI码：
- 10.1016/j.mtla.2022.101603
- 发表时间：
- 2022-12-01
- 教研室：
- 电力系
- 摘要：
- Solid-state batteries have attracted significant attention owing to their high energy density and high safety. Nevertheless, highly conductive solid electrolytes with ultrafast Li-ion mobility are in greatly demanded. In this work, bromine-rich argyrodite electrolytes have been synthesized by the typical high-rotation milling followed by an annealing method. The precursor with pure argyrodite structure is first obtained and a subsequent sintering process is applied to enhance the Li-ion conductivity. Br dopant is tailored to obtain the optimum composition with the highest conductivity. Li5.6PS4.6Br1.4 electrolyte delivers a high conductivity of 6.91 mS/cm at room temperature. The solid-state battery using the pristine LiNi0.6Mn0.2Co0.2O2 cathode and Li-In anode shows a high discharge capacity of 143.4 mAh g-1 and excellent capacity retention of 92.3% after 100 cycles at 0.2C under room temperature. Moreover, the assembled all-solid-state battery also displays high discharge capacities of 156.6 mAh g-1 at 0.2C under 60 oC and 97.1 mAh g-1 at 0.02C under -20 oC. Due to the good lithium metal compatibility of Li5.6PS4.6Br1.4 electrolyte, LiNi0.6Mn0.2Co0.2O2/Li5.6PS4.6Br1.4/Li all-solid-state Li metal is successfully constructed and displays excellent performances.
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