ACS applied materials & interfaces, volume 13, issue 41, pages 48525-48535

Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte

Libo Li 1
YuHang SHAN 1
Furi Wang 1
Xiaochuan Chen 1
Yangmingyue Zhao 1
Da Zhou 1
Heng Wang 1
Wenjun Cui 1
Publication typeJournal Article
Publication date2021-10-08
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor9.5
ISSN19448244, 19448252
General Materials Science
Abstract
Solid-state lithium batteries using solid polymer electrolytes can improve the safety and energy density of batteries. Smoother lithium-ion channels are necessary for solid polymer electrolytes with high ionic conductivity. The porosity and channel structure of the polymer film affect the transfer of lithium ions. However, their controllable synthesis remains a big challenge. Here, we developed a simple synthesis approach toward wrinkled microporous polymer electrolytes by combining the amphoteric (water solubility and organic solubility) polymer in three polymer blends. The homogeneous blend solution spontaneously wrinkled to vertical fold channels as the solvent evaporated. Two minor polymers, poly(vinyl pyrrolidone) (PVP) and polyetherimide (PEI), formed close stacks, and Janus PVP was dispersed in the poly(vinylidene fluoride) (PVDF) matrix. The interfacial tensions between the three polymers were different, so stress was produced when they solidified. The solvent was evaporated to the top layer of the polymers when the temperature increased. The bottom layer wrinkled owing to the stress during solidification. The evaporation of the solvent generated micropores to form the lithium-ion channel. They helped Li+ transference and created a wrinkled microporous PVDF-based polymer electrolyte, which achieved an ionic conductivity of 5.1 × 10-4 S cm-1 and a lithium-ion transference number of 0.51 at room temperature. Meanwhile, the good flame retardancy and tensile strength of the polymer electrolyte film can improve the safety of the battery. At 0.5C and room temperature, the batteries with a LiFePO4 cathode and the wrinkled microporous LiTFSI/PEI/PVP/PVDF electrolyte reached a high discharge specific capacity of 122.1 mAh g-1 at the 100th cycle with a Coulombic efficiency of above 99%. The results of tensile and self-extinguishing tests show that the polymer electrolyte film has good safety application prospects.

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Li L. et al. Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte // ACS applied materials & interfaces. 2021. Vol. 13. No. 41. pp. 48525-48535.
GOST all authors (up to 50) Copy
Li L., SHAN Y., Wang F., Chen X., Zhao Y., Zhou D., Wang H., Cui W. Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte // ACS applied materials & interfaces. 2021. Vol. 13. No. 41. pp. 48525-48535.
RIS |
Cite this
RIS Copy
TY - JOUR
DO - 10.1021/acsami.1c11489
UR - https://doi.org/10.1021/acsami.1c11489
TI - Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte
T2 - ACS applied materials & interfaces
AU - SHAN, YuHang
AU - Wang, Furi
AU - Chen, Xiaochuan
AU - Zhao, Yangmingyue
AU - Zhou, Da
AU - Cui, Wenjun
AU - Li, Libo
AU - Wang, Heng
PY - 2021
DA - 2021/10/08 00:00:00
PB - American Chemical Society (ACS)
SP - 48525-48535
IS - 41
VL - 13
SN - 1944-8244
SN - 1944-8252
ER -
BibTex |
Cite this
BibTex Copy
@article{2021_Li,
author = {YuHang SHAN and Furi Wang and Xiaochuan Chen and Yangmingyue Zhao and Da Zhou and Wenjun Cui and Libo Li and Heng Wang},
title = {Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte},
journal = {ACS applied materials & interfaces},
year = {2021},
volume = {13},
publisher = {American Chemical Society (ACS)},
month = {oct},
url = {https://doi.org/10.1021/acsami.1c11489},
number = {41},
pages = {48525--48535},
doi = {10.1021/acsami.1c11489}
}
MLA
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MLA Copy
Li, Libo, et al. “Improving Fast and Safe Transfer of Lithium Ions in Solid-State Lithium Batteries by Porosity and Channel Structure of Polymer Electrolyte.” ACS applied materials & interfaces, vol. 13, no. 41, Oct. 2021, pp. 48525-48535. https://doi.org/10.1021/acsami.1c11489.
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