Fabricating genetically engineered high-power lithium-ion batteries using multiple virus genes

Yun Jung Lee, Hyunjung Yi, Woo Jae Kim, Kisuk Kang, Dong Soo Yun, Michael S. Strano, Gerbrand Ceder, Angela M. Belcher

Research output: Contribution to journalArticlepeer-review

644 Scopus citations

Abstract

Development of materials that deliver more energy at high rates is important for high-power applications, including portable electronic devices and hybrid electric vehicles. For lithium-ion (Li+) batteries, reducing material dimensions can boost Li+ ion and electron transfer in nanostructured electrodes. By manipulating two genes, we equipped viruses with peptide groups having affinity for single-walled carbon nanotubes (SWNTs) on one end and peptides capable of nucleating amorphous iron phosphate (a-FePO 4) fused to the viral major coat protein. The virus clone with the greatest affinity toward SWNTs enabled power performance of a-FePO4 comparable to that of crystalline lithium iron phosphate (c-LiFePO4) and showed excellent capacity retention upon cycling at 1C. This environmentally benign low-temperature biological scaffold could facilitate fabrication of electrodes from materials previously excluded because of extremely low electronic conductivity.

Original languageEnglish
Pages (from-to)1051-1055
Number of pages5
JournalScience
Volume324
Issue number5930
DOIs
StatePublished - 22 May 2009

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