Sponge-like Nanoporous SiO2-Based Polyethylene Separators for Safe Fast-Charging Lithium-Ion Batteries

Pengfei Lv; Tianlong Huo; Shang Gao; Peicheng Li; Pengcheng Li; Zhaoyang Guo; Junjie Shi; Di Zhang; Song Xie; Yuanhua He; Meize Pan; Yong Cao; Kejing Shi

doi:10.1021/acsanm.4c05756

Sponge-like Nanoporous SiO₂-Based Polyethylene Separators for Safe Fast-Charging Lithium-Ion Batteries

Pengfei Lv^*
, Tianlong Huo
, Shang Gao
, Peicheng Li
, Pengcheng Li
, Zhaoyang Guo
, Junjie Shi
, Di Zhang
, Song Xie
, Yuanhua He
, Meize Pan
, Yong Cao^*
, Kejing Shi

^*Corresponding author for this work

Civil Aviation Flight University of China
China Lithium Battery Technology Co., Ltd.
University of East London

Research output: Contribution to journal › Article › Scientific › peer-review

2 Citations (Scopus)

Abstract

Fast charging of lithium-ion batteries (LIBs) is currently crucial for the widespread use of electric vehicles and consumer electronics, but this process is challenged by the rapid consumption of liquid electrolytes. Commercial Al₂O₃ ceramic-based separators show low electrolyte absorption, so they cannot meet the future demands of fast charging. In this study, a sponge-like membrane composed of nanoporous SiO₂ and a polyethylene substrate was developed as a separator for LIBs. The as-prepared SiO₂-coated separator (S-CS) exhibits an excellent performance, including a high swelling degree (362%), ionic conductivity (7.8 × 10^-3 S/cm at 25 °C), and a wide electrochemical stabilization window (5.1 V). The NMC523/S-CS/graphite pouch cell exhibits a discharge capacity retention of 88.9% and a Coulombic efficiency of 99.7% over 500 cycles at a fast-charging rate of 2 C and 25 °C. Furthermore, the cell does not show any lithium plating and a lower surface temperature (33.6 °C) after cycling, which significantly improves the safety of the fast charging of LIBs. Therefore, this study offers useful insights into the effect of separators on fast charging and strategic suggestions for the safe fast-charging of LIBs.

Original language	English
Pages (from-to)	28553-28562
Number of pages	10
Journal	ACS Applied Nano Materials
Volume	7
Issue number	24
Early online date	11 Dec 2024
DOIs	https://doi.org/10.1021/acsanm.4c05756
Publication status	Published - 27 Dec 2024
MoE publication type	A1 Journal article-refereed

Funding

The authors would like to thank the support from National Natural Science Foundation of China (No. 22379162), the project of Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province (MZ2022JB02), the Fundamental Research Funds for the Central Universities (CZKY2024086) and the College Student Innovation and Entrepreneurship Program of Civil Aviation Flight University of China (S202310624036).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

fast-charging
lithium-ion batteries
nanoporous SiO
safety
separator

Access to Document

10.1021/acsanm.4c05756

Cite this

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title = "Sponge-like Nanoporous SiO2-Based Polyethylene Separators for Safe Fast-Charging Lithium-Ion Batteries",

abstract = "Fast charging of lithium-ion batteries (LIBs) is currently crucial for the widespread use of electric vehicles and consumer electronics, but this process is challenged by the rapid consumption of liquid electrolytes. Commercial Al2O3 ceramic-based separators show low electrolyte absorption, so they cannot meet the future demands of fast charging. In this study, a sponge-like membrane composed of nanoporous SiO2 and a polyethylene substrate was developed as a separator for LIBs. The as-prepared SiO2-coated separator (S-CS) exhibits an excellent performance, including a high swelling degree (362\%), ionic conductivity (7.8 × 10-3 S/cm at 25 °C), and a wide electrochemical stabilization window (5.1 V). The NMC523/S-CS/graphite pouch cell exhibits a discharge capacity retention of 88.9\% and a Coulombic efficiency of 99.7\% over 500 cycles at a fast-charging rate of 2 C and 25 °C. Furthermore, the cell does not show any lithium plating and a lower surface temperature (33.6 °C) after cycling, which significantly improves the safety of the fast charging of LIBs. Therefore, this study offers useful insights into the effect of separators on fast charging and strategic suggestions for the safe fast-charging of LIBs.",

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author = "Pengfei Lv and Tianlong Huo and Shang Gao and Peicheng Li and Pengcheng Li and Zhaoyang Guo and Junjie Shi and Di Zhang and Song Xie and Yuanhua He and Meize Pan and Yong Cao and Kejing Shi",

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AU - Lv, Pengfei

AU - Huo, Tianlong

AU - Gao, Shang

AU - Li, Peicheng

AU - Li, Pengcheng

AU - Guo, Zhaoyang

AU - Shi, Junjie

AU - Zhang, Di

AU - Xie, Song

AU - He, Yuanhua

AU - Pan, Meize

AU - Cao, Yong

AU - Shi, Kejing

PY - 2024/12/27

Y1 - 2024/12/27

N2 - Fast charging of lithium-ion batteries (LIBs) is currently crucial for the widespread use of electric vehicles and consumer electronics, but this process is challenged by the rapid consumption of liquid electrolytes. Commercial Al2O3 ceramic-based separators show low electrolyte absorption, so they cannot meet the future demands of fast charging. In this study, a sponge-like membrane composed of nanoporous SiO2 and a polyethylene substrate was developed as a separator for LIBs. The as-prepared SiO2-coated separator (S-CS) exhibits an excellent performance, including a high swelling degree (362%), ionic conductivity (7.8 × 10-3 S/cm at 25 °C), and a wide electrochemical stabilization window (5.1 V). The NMC523/S-CS/graphite pouch cell exhibits a discharge capacity retention of 88.9% and a Coulombic efficiency of 99.7% over 500 cycles at a fast-charging rate of 2 C and 25 °C. Furthermore, the cell does not show any lithium plating and a lower surface temperature (33.6 °C) after cycling, which significantly improves the safety of the fast charging of LIBs. Therefore, this study offers useful insights into the effect of separators on fast charging and strategic suggestions for the safe fast-charging of LIBs.

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