National Transport Library Research Database

Nanostrukturerade material och elektrokemiska system för energiomvandling och lagring

  • Uppsala universitet, Universitet eller högskola, 202100-2932
Sponsors, duration, budget: Energimyndigheten ; 2012-01-01 -- 2014-12-31 ; 2565000 kronorRegistration number:
  • Energimyndigheten 2011005224
Subject(s): Abstract: Projektet syftar till att undersöka hur nanomaterial kan användas i elektroderna hos litiumjonbatterier för att öka deras energi- och effekttäthet. Dessa batteriegenskaper har stor betydelse för energilagring i elektrifierade fordon och i applikationer för smarta nät.Abstract: New nanomaterials and architectures can lead to the next generation of Li-ion batteries combining high energy- and high power density but in three dimensions. This project focuses on nanomaterials for electrodes/electrolytes to be studied for conventional and 3D microbatteries (MBs). Nanomaterials increase the rate for Li insertion/extraction in electrodes. New reactions can take place leading to reversible cycling not existing for micronsized particles. Larger surface area gives enhanced surface reactions in the electrode/electrolyte interface with irreversible loss of lithium, side reactions and reduced battery life. Nanoparticles of Si and Sn alloy with Li with more than the double of the storage capacity compared to commercially used graphite will be studied as pure nanoparticles, intermetallics and Zintl phases. In this way and with new binder materials the problem of volume expansion during alloying can be circumvented. On the cathode side nanoparticles of LiFePO4 and LiNiCoMnO2 will be studied. All selected nanomaterials will be made to active electrodes in 3D MBs. Shaping the current collectors Cu (negative) and Al (positive) to nanorods, foams or sponges, to be used as a backbone for a 3D MB built like a skyscraper on a small foot print area. Electrode materials and electrolytes will be deposited with different techniques. All materials and interfaces will be characterized and a 3D MB will be made. The results will be generalized also for conventional batteries.
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