Architecturing Hierarchical Function Layers on Self-Assembled Viral Templates as 3D Nano-Array Electrodes for Integrated Li-Ion Microbatteries

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• 作者：Yihang Liu ; Wei Zhang ; Yujie Zhu ; Yanting Luo ; Yunhua Xu ; Adam Brown ; James N. Culver ; Cynthia A. Lundgren ; Kang Xu ; Yuan Wang ; Chunsheng Wang
• 刊名：Nano Letters
• 出版年：2013
• 出版时间：January 9, 2013
• 年：2013
• 卷：13
• 期：1
• 页码：293-300
• 全文大小：439K
• 年卷期：v.13,no.1(January 9, 2013)
• ISSN：1530-6992

文摘

This work enables an elegant bottom-up solution to engineer 3D microbattery arrays as integral power sources for microelectronics. Thus, multilayers of functional materials were hierarchically architectured over tobacco mosaic virus (TMV) templates that were genetically modified to self-assemble in a vertical manner on current-collectors, so that optimum power and energy densities accompanied with excellent cycle-life could be achieved on a minimum footprint. The resultant microbattery based on self-aligned LiFePO₄ nanoforests of shell鈥揷ore鈥搒hell structure, with precise arrangement of various auxiliary material layers including a central nanometric metal core as direct electronic pathway to current collector, delivers excellent energy density and stable cycling stability only rivaled by the best Li-ion batteries of conventional configurations, while providing rate performance per foot-print and on-site manufacturability unavailable from the latter. This approach could open a new avenue for microelectromechanical systems (MEMS) applications, which would significantly benefit from the concept that electrochemically active components be directly engineered and fabricated as an integral part of the integrated circuit (IC).

Keywords:

3D microbattery arrays; nanohierarchy; tobacco mosaic virus; integral power for microelectronics; LiFePO₄ nanoforests; magnetron sputtering