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[資源]
An all-in-one nanopore battery array
Abstract:A single nanopore structure that embeds all components of an electrochemical storage device could bring about the ultimate miniaturization in energy storage. Self-alignment of electrodes within each nanopore may enable closer and more controlled spacing between electrodes than in state-of-art batteries. Such an ‘a(chǎn)ll-in-one’ nanopore battery array would also present an alternative to interdigitated electrode structures that employ complex three-dimensional geometries with greater spatial heterogeneity. Here, we report a battery composed of an array of nanobatteries connected in parallel, each composed of an anode, a cathode and a liquid electrolyte confined within the nanopores of anodic aluminium oxide, as an all-in-one nanosize device. Each nanoelectrode includes an outer Ru nanotube current collector and an inner nanotube of V2O5 storage material, forming a symmetric full nanopore storage cell with anode and cathode separated by an electrolyte region. The V2O5 is prelithiated at one end to serve as the anode, with pristine V2O5 at the other end serving as the cathode, forming a battery that is asymmetrically cycled between 0.2 V and 1.8 V. The capacity retention of this full cell (relative to 1 C values) is 95% at 5 C and 46% at 150 C, with a 1,000-cycle life. From a fundamental point of view, our all-in-one nanopore battery array unveils an electrochemical regime in which ion insertion and surface charge mechanisms for energy storage become indistinguishable, and offers a testbed for studying ion transport limits in dense nanostructured electrode arrays.![An all-in-one nanopore battery array]()
nnano.2014.247 1.jpg
![An all-in-one nanopore battery array-1]()
Nanopore battery geometry.jpg
![An all-in-one nanopore battery array-2]()
Electrochemical charge–discharge of a V2O5/Ru nanotube half-cell device.jpg
![An all-in-one nanopore battery array-3]()
Electrochemical charge–discharge of a half-cell device at high-rate cycle life.jpg
![An all-in-one nanopore battery array-4]()
Rate performance of V2O5 nanotube half cell with planar Au versus Ru-nanotube current collectors.jpg
![An all-in-one nanopore battery array-5]()
Deconvolution of charge contributions from CVs.jpg
![An all-in-one nanopore battery array-6]()
Symmetrically cycled full cell with voltage window from −1 V to 1 V.jpg
![An all-in-one nanopore battery array-7]()
Asymmetrical cycling between 0.2 V and 1.8 V.jpg |
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- 附件 1 : nnano.2014.247.pdf
2014-11-11 09:55:41, 4.55 M
- 附件 2 : nnano.2014.247-s1.pdf
2014-11-11 09:55:50, 1.91 M
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