Polycarbonate-based solid polymer electrolytes for Li-ion batteries
2013 (English)In: Solid State Ionics, ISSN 0167-2738, E-ISSN 1872-7689, Vol. 262, 738-742 p.Article in journal (Refereed) Published
This paper reports the synthesis and application of high-molecular-weight poly(trimethylene carbonate) (PTMC) as a new host material for solid polymer electrolyte-based Li-ion batteries. PTMC was synthesized through bulk ring-opening polymerization of the cyclic monomer to yield a high-molecular-weight polymer to serve as a base material for the electrolytes. The thermal properties and ionic conductivity of polymer electrolytes with different salt ratios were measured by TGA/DSC and electrochemical impedance spectroscopy, respectively. The most conductive systems were found at [Li+]:[carbonate] ratios of 1:13 and 1:8, which showed electrochemical stability up to 5.0 V vs. Li/Li+ and an ionic conductivity on the order of 10− 7 Scm(-1) at 60 °C. LiFePO4 half-cells using the electrolytes demonstrated a plateau in the specific discharge capacity around 153 mAhg(-1) after long-term cycling. The functionality of the electrolytes for three-dimensional microbatteries was also confirmed.
Place, publisher, year, edition, pages
2013. Vol. 262, 738-742 p.
Polycarbonate; Trimethylene carbonate; Polymer electrolyte; Li-ion battery; 3D-microbattery
Research subject Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-208985DOI: 10.1016/j.ssi.2013.08.014ISI: 000338810500161OAI: oai:DiVA.org:uu-208985DiVA: diva2:655587
19th International Conference on Solid State Ionics (SSI), Kyoto, Japan, June 02-07, 2013