Lithium-Ion Battery—3D Micro-/Nano-Structuring, Modification and Characterization
Lithium-Ion Battery—3D Micro-/Nano-Structuring, Modification and Characterization
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DOI：
10.1007/978-3-030-59313-1_11
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Wilhelm Pfleging;P. Gotcu;P. Smyrek;Yijing Zheng;Joong-Kee Lee;H. Seifert
中科院分区：
文献类型：
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作者：
Wilhelm Pfleging;P. Gotcu;P. Smyrek;Yijing Zheng;Joong-Kee Lee;H. Seifert
用于电极材料的微/纳米结构化的激光加工技术在改善锂离子电池的电化学性能和工作寿命方面具有巨大的潜力。不同类型的激光结构化用于不同的表面，例如金属集电器和薄膜或厚膜电极。对于薄金属集流体箔，在阳极和阴极侧，通过激光诱导的周期性表面结构和激光干涉方法的自组织结构被成功地应用于改善电极膜粘附和电池阻抗。对于薄膜和厚膜电极层，发现具有低至微米范围的结构尺寸和高纵横比的直接激光烧蚀是最强大的，以便产生三维（3D）电池架构，其具有关于电池性能和复合电极与液体电解质的均匀润湿的益处。检测到激光形成的3D电池在高充电和放电速率下对容量保持率和电池寿命的巨大影响。采用恒电流间歇滴定法和循环伏安法等经典方法研究了激光结构化三维电极对扩散动力学的影响。由于在高电位状态下操作和先进的高能硅阳极材料，3D电池性能的进一步改善通过在激光图案化之前将激光结构化和活性颗粒的薄膜钝化结合或通过在激光处理之后钝化完整的3D电极来实现。最后，激光诱导击穿光谱将作为一个强大的工具，整个二维和三维电极的元素映射。研究和分析了3D结构对2D电池中锂分布和化学降解过程的影响。
Laser processing technologies for micro-/nanostructuring of electrode materials have a great potential in improving the electrochemical performance and operational lifetime of lithium-ion cells. Different types of laser structuring were used on different surfaces such as metallic current collectors and thin or thick film electrodes. For thin metallic current collector foils, at anode and cathode sides, the self-organized structuring by laser-induced periodical surface structures and laser interference methods were successfully applied for improving electrode film adhesion and cell impedance. For thin and thick film electrode layers direct laser ablation with structure sizes down to the micrometer range and high aspect ratios were found most powerful in order to create three-dimensional (3D) cell architectures with benefits regarding cell performance and a homogenous wetting of composite electrodes with liquid electrolyte. A huge impact of laser formed 3D batteries regarding capacity retention and cell lifetime at high charging and discharging rates was detected. The impact on diffusion kinetics of laser structured 3D electrodes was studied using classical methods such galvanostatic intermittent titration technique and cyclic voltammetry. A further improvement of 3D battery performance due to an operation in high potential regime and for advanced high energy silicon anode material was achieved by joining of laser structuring and thin-film passivation either of active particles before laser patterning or by passivating of complete 3D electrodes after laser processing. Finally, laser-induced breakdown spectroscopy will be presented as a powerful tool for elemental mapping of entire 2D and 3D electrodes. The impact of 3D architectures on lithium distribution and chemical degradation processes in 2D batteries was investigated and analyzed.