Micrometer-sized Silicon (Si) particles suffer from a large volume expansion as anode materials for lithium-ion batteries, a simple but effective strategy was introduced to address this problem via using Si nanoparticles as a structural and conductive additive, with micrometer-sized Si as the primary lithium storage material. The resulting electrode reached a high specific capacity of 2500 mAh/g after 30 cycles with a high initial coulombic efficiency of 73% as well as good rate performance during electrochemical lithiation and delithiation. We proposed that the Si nanoparticles connecting into the network structure in situ during the charge process, would provide electronic connectivity and structure stability for the electrode.

In situ formed si nanoparticle network with micron-sized si particles for lithium-ion battery anodes

248th National Meeting (2014)

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