当前位置: X-MOL 学术Appl. Phys. Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Combination of 3D current collectors and in situ polymerized electrolytes enabling high-mass-loading cathodes for solid-state lithium batteries
Applied Physics Letters ( IF 4 ) Pub Date : 2023-05-23 , DOI: 10.1063/5.0147529
Qifu Sun, Muhammad Khurram Tufail, Wenkai Li, Ning Zhao, Zhijie Bi, Xiangxin Guo

Solid-state lithium batteries (SSLBs) are promising energy storage devices in the future due to their high theoretical energy density and enhanced safety. However, the practical energy density of SSLBs is severely constrained by the limited mass loading of cathode materials, which is related to sluggish charge transfer inside the thick cathodes. In this work, the solid-state batteries with high-mass-loading cathodes are realized by introduction of three-dimensional (3D) electronic-conductivity current collectors and in situ solidification of polymer electrolytes. The porous electronic current collectors of 3D carbon felts accommodate the flowing cathode slurry with considerably increased loading of cathode materials. Subsequently, the in situ solidified polymer electrolytes ensure conformal ionic conducting channels inside the cathodes, along with the formation of intimate and flexible contacts at cathode/electrolyte interfaces. In this way, the solid-state LiFePO4/garnet/Li batteries with cathode loading of 6.2 mg cm−2 show an initial discharge capacity of 159.4 mAh g−1 and a capacity retention of 92.1% after 100 cycles at 30 °C and 0.1 C. Furthermore, the cathode mass loading as high as 27.8 mg cm−2 is achieved with a corresponding areal capacity of approximately 4.2 mAh cm−2. This work proposes a promising unique cathode architecture for solid-state lithium batteries with high mass loading of the cathode.

中文翻译:

3D 集电器与原位聚合电解质的结合,可为固态锂电池提供高载量阴极

固态锂电池(SSLB)由于其高理论能量密度和增强的安全性,在未来是有前途的储能设备。然而,SSLBs 的实际能量密度受到正极材料有限质量负载的严重限制,这与厚正极内部的缓慢电荷转移有关。在这项工作中,通过引入三维 (3D) 电子导电集电器和聚合物电解质的原位固化,实现了具有高质量负载阴极的固态电池。3D 碳毡的多孔电子集电器可容纳流动的阴极浆料,阴极材料的负载量显着增加。随后,原位固化的聚合物电解质确保了阴极内部的共形离子导电通道,以及在阴极/电解质界面处形成紧密且灵活的接触。这样,正极负载量为 6.2 mg cm-2 的固态 LiFePO4/石榴石/锂电池在 30 °C 和 0.1 C. 此外,阴极质量负载高达 27.8 mg cm-2,相应的面积容量约为 4.2 mAh cm-2。这项工作为具有高质量阴极负载的固态锂电池提出了一种有前途的独特阴极结构。在 30 °C 和 0.1 C 下循环 100 次后为 1%。此外,阴极质量负载高达 27.8 mg cm-2,相应的面积容量约为 4.2 mAh cm-2。这项工作为具有高质量阴极负载的固态锂电池提出了一种有前途的独特阴极结构。在 30 °C 和 0.1 C 下循环 100 次后为 1%。此外,阴极质量负载高达 27.8 mg cm-2,相应的面积容量约为 4.2 mAh cm-2。这项工作为具有高质量阴极负载的固态锂电池提出了一种有前途的独特阴极结构。
更新日期:2023-05-23
down
wechat
bug