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余创

教授    博士生导师    硕士生导师

个人信息 更多+
  • 教师英文名称: Chuang Yu
  • 性别: 男
  • 在职信息: 在职
  • 所在单位: 电气与电子工程学院
  • 学历: 研究生(博士)毕业
  • 学位: 工学博士学位

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论文成果

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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.