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

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

机构地区：[1]College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China [2]Institute for Advanced Study,Shenzhen University,Shenzhen 518060,Guangdong,China [3]Institute of Carbon Neutrality,Zhejiang Wanli University,Ningbo 315100,Zhejiang,China [4]College of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,Liaoning,China [5]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China [6]College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

出　　处：《Journal of Energy Chemistry》2024年第7期288-298,共11页能源化学（英文版）

基　　金：supported by the funding from the Natural Science Foundation of China (22105129);the Guangdong Basic and Applied Basic Research Foundation (2022A1515011048,2022A1515010670);the Science and Technology Innovation Commission of Shenzhen (JCYJ20200109105618137,20200812112006001)

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/LiFePO_(4) 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.

关 键 词：Lithium metal-based battery Salt-induced POLYBENZIMIDAZOLE Tunablemorphology lonic potency 

分 类 号：TM912[电气工程—电力电子与电力传动]