Alkaline solid polymer electrolytes (ASPEs) comprising of poly(vinyl alcohold) (PVA) and KOH with addition of natural halloysites (HNTs) nanotube have been prepared. The ionic conductivity and thermal stability of ASPE were improved by the blending of HNTs. The PVA-KOH-HNTs ASPE with m(PVA): m(KOH)=1.5:1.5 and HNTs=8 wt% exhibited the highest ionic conductivity of 0.071 S·cm?1 at 30 oC. The microstructures of the PVA-KOH-HNTs ASPEs were measured by FTIR and XRD, and the micro-porous morphology was observed by SEM. The influence of temperature on the ionic conductivity was detected. To investigate the electrochemical properties of the ASPE, a Ni-MH battery with the configuration of hydrogen storage alloy/PVA-KOH-HNTs/Ni(OH)2 was fabricated. The highest discharge capacity of 223 mAh·g-1 was obtained.
展开▼
