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Electrospun PU/PVP/GO Separator for Li-ion Batteries
Kedong Song,Ping Zhang,Yuting Huang,Fu Xu,Yanhuai Ding 한국섬유공학회 2019 Fibers and polymers Vol.20 No.5
Polyurethane (PU) has been intensively studied as a promising separator material for Li-ion batteries (LIBs). However, poor dimensional stability and low liquid-electrolyte wettability of pure PU separator restrict its application inLIBs. Here polyvinyl pyrrolidone (PVP) and graphene oxide were employed to enhance the thermal stability, mechanicalperformance and liquid-electrolyte compatibility of PU separator. High anodic stability above 5.25 V was reached in PU/PVP/GO separator, fully compatible with the high-voltage cathode materials. The electrochemical characterization indicatesPU/PVP/GO membrane is a promising separator for advanced LIBs.
Fabrication of Aligned PI/GO Nanofibers for Battery Separators
Qiong Tian,Qiuhong Liu,Kedong Song,Yufan Mei,Jinfeng Peng,Jinfeng Peng,Ji Zhou,Yanhuai Ding 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1
Highly aligned polyimide/graphene oxide (PI/GO) nanofibers were fabricated by using the electrospinning method. As a separator for Li-ion batteries, the PI/GO nanofibers show excellent thermal stability, good wettability toward organicliquid electrolytes and superior electrochemical performance compared to raw PI and commercial battery separators. TheGO nanosheets not only greatly enhance the mechanical strength of the PI matrix, but also increase the resistance to Lidendrites.