Tuning solid interfaces via varying electrolyte distributions enables high performance solid-state batteries
发布时间：2022-02-08
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- 论文类型：
- 期刊论文
- 发表刊物：
- Energy & Environmental Materials
- 收录刊物：
- SCI
- 所属单位：
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
- 学科门类：
- 工学
- 一级学科：
- 材料科学与工程
- 文献类型：
- J
- DOI码：
- 10.1002/eem2.12308
- 发表时间：
- 2021-11-02
- 影响因子：
- 15.122
- 摘要：
- Solid/solid interface is the major challenge for high-performance solid-state batteries. Solid electrolytes (SEs) play a crucial role in the fabrication of effective interfaces in solid-state batteries. Herein, the electrolyte distribution with varied particle sizes is tuned to construct solid-state batteries with excellent performance at different operating temperatures. Solid-state batteries with the configuration S/L (small-sized SE in composite cathode and large-sized SE in electrolyte layer) show the best performance at room temperature (168 mAh g-1 at 0.2 C, retention of 99%, 100 cycles) and -20 ℃ (89 mAh g-1 at 0.05 C), while the configuration S/S displays better performance at elevated temperature. The superior performance of the S/L battery is associated with faster lithium-ion dynamics due to the better solid/solid interface between active materials and electrolytes. Moreover, the inferior performance at 60 ℃ is caused by the formation of voids and cracks in the electrolyte layer during cycling. In contrast, the S/S battery delivers superior performance at elevated operating temperatures because of the integrated structure. This work confirms that tailoring electrolyte size has a significant effect on fabricating all-climate solid-state batteries.