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Citation: TANG Ding-guo, LIU Jian-hong, CI Yun-xiang, QI Lu. Preparation and Performances of a Novel Gel Polymer Electrolyte[J]. Acta Physico-Chimica Sinica, ;2005, 21(11): 1263-1268. doi: 10.3866/PKU.WHXB20051114 shu

Preparation and Performances of a Novel Gel Polymer Electrolyte

1.
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871; CITIC Guo’an Mengguli Power Source Technology Company, Limited, Beijing 102200

Received Date: 26 April 2005
Available Online: 15 November 2005

A novel gel polymer electrolyte (GPE) based on noepentyl glycol diacrylate (NPGDA) and poly(vinyli-dene fluofide-co-hexafluoropropylenen) (PVDF-HFP) was prepared by a thermal polymerization method. GPE with a stable interpenetrating polymer network (IPN) structure was used to assemble polymer lithium-ion batteries. The influence of PVDF-HFP/NPGDA mass ratios on the characteristics of GPE was studied by scanning electron microscopy, linear sweep voltammetry and electrochemical impedance spectroscopy. The results show that PVDF-HFP/NPGDA mass ratio greatly affects the performances of GPE, such as surface morphology and ionic conductivity. When the mass ratio between PVDF-HFP and NPGDA is 1:1, GPE boasts a high ionic conductivity of 6.99×10^-3 S•cm^-1 and an electrochemical stability window of 4.8 V(vs Li⁺/Li) at 25 ℃. The polymer lithium-ion batteries based on GPE also present excellent performances, such as high rate capability and discharge voltage plateau, od temperature reliability, and excellent cycling.
- Gel polymer electrolyte;Noepentyl glycol diacrylate; Interpenetrating polymer network;Thermal polymerization;Polymer lithium-ion batteries
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