Fabricating Genetically Engineered High-Power Lithium-Ion Batteries Using Multiple Virus Genes
Fabricating Genetically Engineered High-Power Lithium-Ion Batteries Using Multiple Virus Genes
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DOI：
10.1126/science.1171541
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发表时间：
2009-05-22
期刊：
影响因子：
56.9
通讯作者：
Belcher, Angela M.
中科院分区：
文献类型：
--
作者：
Lee, Yun Jung;Yi, Hyunjung;Belcher, Angela M.
开发以高速率提供更多能量的材料对于高功率应用（包括便携式电子设备和混合动力电动车辆）是重要的。对于锂离子（Li+）电池，减小材料尺寸可以促进纳米结构电极中的Li+离子和电子转移。通过操纵两个基因，我们配备了病毒与肽组具有亲和力的单壁碳纳米管（SWNT）的一端和肽能够成核无定形磷酸铁（a-FePO 4）融合到病毒的主要外壳蛋白。对SWNT具有最大亲和力的病毒克隆使a-FePO 4的功率性能与结晶磷酸铁锂（c-LiFePO 4）的功率性能相当，并且在1C下循环时显示出优异的容量保持率。这种环境友好的低温生物支架可以促进电极的制造，这些材料以前被排除在外，因为电子电导率极低。
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-FePO4) 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.