4 / 31
Page 72
Notes:
April 16-17, 2018 Las Vegas, Nevada, USA
2
nd
Edition of
Graphene & Semiconductors | Diamond Graphite & Carbon Materials Conference
6
th
Edition of
Smart Materials & Structures Conference
&
Journal of Material Sciences and Engineering| ISSN: 2169-0022 | GDCSM-2018 | Volume: 7
Ultra-High Molecular Weight Polyethylene (UHMWPE) material for lithium battery separators
Xinwei Wang
Shanghai Research Institue of Chemical Industry, China
U
ltra-high molecular weight polyethylene is a kind of resin with excellent physical, chemical, mechanical properties and
low price.With high mechanical strength and gel-like structure when melting,UHMWPE lithium ion battery separators
show better safety properties than traditional separators. In this work, UHMWPE separators were prepared by thermally
induced phase separation (TIPS), using liquid paraffin (LP) as diluent. Specified UHMWPE resin for LiB separators with 1.2
million viscosity molecular weight in average was produced by Shanghai Research Institute of Chemical Industry and used as
raw material.The UHMWPE resin was dissolved by LP under heat and shear of a twin-screw extruder, then processed to be
film. Raw films were cooled through a series of casting rolls and followed with solid-liquid phase separation, where paraffin was
extracted from the film by dichloromethane. The film was then drawn to ideal thickness and tested.The preparation process
was optimized by Uniform Design, where permeability, tensile strength, puncture intensity and heat shrinkage was considered
as key characteristic for the separators.The results were analyzed via DPS (Data Processing System) software by quadratic
polynomial regression method. The simulation result show that ideal experiment condition is the extrusion temperature at
225
o
c, twin-screw speed at 36rpm, solution concentration at 24% and cooling temperature at 55
o
c. Verification test was then
taken place and the results showed that the air permeability of the separator increased by 53% to 820 s/100ml ,the tensile
strength increased by 21% to 173 Mpa,puncture intensity increased by 11% to 515 g/20μm, the heat shrinkage decreased by
57% to 1.2%.
Biography
Xinwei Wang has completed his PhD at 2007 from Donghua University. He is now the Vice Chief Engineer of Technology and Research Center and member of
Technical and Economic Committee in Shanghai Research Institue of Chemical Industry. He has been rewarded 2017 Shanghai Outstanding Technology Leader,
2017 Houdebang Chemical Industry Award, First Prize of Shanghai Technological Invention 2016, Shanghai Youth Rising-star Award. He has published more than
20 research papers and 10 patents, which lead to more than 3 billion dollar economic benefits in downstream industries.
xx880530@gmail.comXinwei Wang, J Material Sci Eng 2018, Volume: 7
DOI: 10.4172/2169-0022-C3-098