Center for Alternative Energy Storage Research and Technology
Final rept. 25 Aug 2009 - 26 Dec 2011
MICHIGAN STATE UNIV EAST LANSING
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Electrolytes, nano-structuring and graphene nanoplatelets for electrodes, and current collectors in batteries and supercapacitors were investigated. The following results were obtained 1 Nano-structuring of graphene nanoplatelets with and without conductive polymers produced supercapacitors with very high specific capacitance greater than 165 Fgm and high frequency greater than 150 Hz response with low losses 2 graphene nanoplatelet thin films can replace copper current collectors in energy storage devices and save weight approx. 80 and reduced cost 3 a relationship between the RTIL type and structure, interfacial capacitance, electron-transfer kinetics and reaction mechanisms of outerand inner-sphere redox systems for sp2 and sp3 carbon electrodes was developed 4 Reductions of internal resistance of supercapacitors and lithium ion batteries was achieved using silver nanorods 30-100nm in diameter, and approximately 200-300nm in length 5 a new ceramic electrolyte membrane technology, based on LLZO has produced an unprecedented combination of high ionic conductivity approx. 1mScm, and stability against Li and air 6 infusion of graphene nanoplatelets into carbon aerogel improves both electrical conductivity and mechanical integrity 7 New balancing and bypassing circuits can maintain the original rated voltage of battery packs even when individual cells fail and 8 faulty battery performance can be detected using time-frequency representations such as wavelet transforms.
- Physical Chemistry
- Energy Storage