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首页> 外文期刊>Materials Science and Engineering >A critical review and assessment of 3D columnar silicon electrode architectures and their performance as negative electrodes in Li-ion cells
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A critical review and assessment of 3D columnar silicon electrode architectures and their performance as negative electrodes in Li-ion cells

机译：3D柱状硅电极架构及其作为锂离子电池负电极的关键评价及其性能

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摘要

A critical review and assessment of 3D columnar Si electrode architectures, as negative electrodes for Li-ion cells, has been undertaken to provide insight on the structure parameters that enable high specific and total Li-storage capacities and high cycling performance. The selected set represents a sufficiently wide variety of columnar architectures, covering most of the possible routes of fabrication, including etching, patterning, photolithography and micromachining. The outcome of this evaluation identifies the structural factors that determine the best performing 3D electrode architecture. Specifically, electrodes with a high mass loading have been shown to correlate very well with high total capacities for Li-storage. Thus, the preferred 3D electrode structures are identified as those with columns of Si with an optimum porosity giving high enough mass loading, but with a balanced column depth and spacing providing effective volume accommodation during cell cycling. The review also provides details of experimental validations of the optimum electrode architecture, which effectively accommodates the volume change, and enables cycling for a larger number of cycles.
机译：已经进行了3D柱状Si电极架构的关键评估和评估，作为锂离子电池的负电极，为锂离子电池的负电极进行了识别，以了解实现高特定和总LI储存能力和高循环性能的结构参数。所选组表示足够多的柱状架构，包括大多数可能的制造途径，包括蚀刻，图案化，光刻和微机器。该评估的结果标识了确定最佳执行3D电极架构的结构因素。具体地，已经显示具有高质量负荷的电极非常良好地与Li储存的高总能力相关。因此，优选的3D电极结构被识别为具有Si的柱的孔隙率，其具有足够高的质量负荷，但是在细胞循环期间具有平衡的柱深度和间隔提供有效的容纳容纳。审查还提供了最佳电极架构的实验验证的细节，其有效地适应体积变化，并使得能够循环循环。

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