화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.45, 68-77, January, 2017
DOI10.1016/j.jiec.2016.09.004  Export Citation
Effect of POSS-PEG hybrid nanoparticles on cycling performance of polyether-LiDFOB based solid polymer electrolytes for all solid-state Li-ion battery applications
Anji Reddy Polu1, 2, †, Hee-Woo Rhee1, 3, †, M. Jeevan Kumar Reddy4, A.M. Shanmugharaj4, Sung Hun Ryu4, and Dong Kyu Kim1, 3
  • 1Polymer Materials Lab, Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapo-Gu, Seoul 121-742, Republic of Korea
  • 2Department of Physics, Vardhaman College of Engineering, Kacharam, Shamshabad, 501218 Hyderabad, Telangana, India
  • 3, Korea
  • 4Department of Chemical Engineering, Kyung Hee University (Global Campus), Yongin-si, Gyeonggi-do 446-701, Republic of Korea
E-mail:,
For the first time, the consequences of organic-inorganic hybrid nanoparticle polyhedral oligomeric silsesquioxane-polyethylene glycol (POSS-PEG(n = 4)) on the physicochemical and electrochemical properties of poly(ethylene oxide) (PEO)-lithium difluoro(oxalato)borate (LiDFOB) based nanocomposite solid polymer electrolyte (NSPE) membranes were systematically prepared and utilized as an active separator for battery applications. The thermal stability and structural properties of the prepared NSPE membranes were analyzed by means of differential scanning calorimetry (DSC), thermogravimetry (TG) and X-ray diffraction (XRD) analyses. The morphological changes by POSS-PEG in polymer electrolyte membranes were investigated by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The incorporation of POSS-PEG greatly enhanced the ionic conductivity, mechanical integrity and compatibility. The maximum ambient temperature ionic conductivity was found to be in the range of 7.28 ×10-5 S/cm for 40 wt% POSS-PEG. Finally, the solid state lithiumcell was assembled as Li/NSPE/LiCoO2. The cell delivered a maximum discharge capacity of 187 mAh g-1 at 0.1C-rate with very good capacity retention up to 50 cycles. The test results indicated that the electrolyte is found to be a better candidate than those reported earlier.
Keywords:POSS-PEG;Ionic conductivity;Rate capability;LiCoO2;Lithium batteries
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