Ionic potency regulation of coagulation bath induced by saline solution to control over the pore structure of PBI membrane for high-performance lithium metal batteries

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外文摘要：In this study,we have explored the use of water as a non-solvent for tuning the microstructure of poly-benzimidazole(PBI)membranes,which are potential separators for lithium metal batteries(LMBs).The traditional method for membrane synthesis called nonsolvent-induced phase separation(NIPS),usually relies on hazardous and costly organic non-solvents.By dissolving sodium chloride(NaCl)in water,we could adjust the water ionic potency and the exchange speed of the non-solvent with the DMAC solution to change the micropore structure of the PBI membrane.With increasing NaCl concentration,the micro-pores in the PBI membrane transitioned from finger-like to sponge-like morphology.Compared to com-mercial separators like the Celgard separator,the PBI membrane with sponge-like micropores exhibited better regulation of lithium deposition and improved Li+transportation capability due to its good wetta-bility with the electrolyte.Consequently,the PBI membrane-based Li/Li symmetric cell and Li/LiFePO4 full cell demonstrated superior performance compared to the Celgard-based ones.This research proposes an eco-friendly and scalable synthetic approach for fabricating commercial separators for LMBs,addressing the issue of lithium dendrite growth and improving overall battery safety and performance.

外文关键词：

Lithium metal-based batterySalt-inducedPolybenzimidazoleTunable morphologyIonic potency

作者：

Arshad Hussain、Waseem Raza、Andleeb Mehmood、Sana Jalees、Lihong Ao、Yonggui Deng、Aymeric Ramiere、Xingke Cai、Dongqing Liu

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作者单位：

College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

Institute for Advanced Study,Shenzhen University,Shenzhen 518060,Guangdong,China

Institute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,Zhejiang,China

College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,Liaoning,China

College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

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基金：

Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research FoundationScience and Technology Innovation Commission of ShenzhenScience and Technology Innovation Commission of Shenzhen

项目编号：

221051292022A15150110482022A1515010670JCYJ2020010910561813720200812112006001

出版年：

2024

DOI：

10.1016/j.jechem.2024.02.066

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.94(7)