Current collector design strategies: The route to realising scale-up of structural power composites
Current collector design strategies: The route to realising scale-up of structural power composites
复制标题
集电器设计策略：实现结构功率复合材料放大的途径
DOI：
10.1016/j.compscitech.2023.109978
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发表时间：
2023
影响因子：
9.1
通讯作者：
Valkova M
中科院分区：
文献类型：
--
作者：
Valkova M
结合了联合收割机机械承载和电化学储能的多功能结构动力复合材料将改变电动汽车的设计。这项工作的重点是结构超级电容器，基于碳气凝胶改性的碳纤维电极与铜集流体。与许多结构功率实施例一样，这些器件的放大目前受到大的内部电阻和与电流收集相关联的质量的限制。在总电阻功率损耗和集电器材料的附加质量之间存在折衷。然而，在这些装置中，机械完整性由结构电极提供，允许考虑一系列收集器设计。使用有限元模拟，这些电流收集策略在一系列的设计空间变量进行定量探索。使用现有最佳材料通过实验测量关键导电性参数，以告知电极/集电器组件的直流导电模拟。对于本装置配置，性能权衡由集电器的面积决定。降低功率损耗的最有效的近期策略在于降低接触电阻;然而，也可以通过修改集电极几何形状来获得改进。本文的研究结果可以推广到其他结构功率复合材料和单功能储能装置，这是相关的许多质量敏感的电化学应用。
Multifunctional structural power composites, which combine mechanical load-bearing and electrochemical energy storage, will transform electric vehicle design. This work focuses on structural supercapacitors, based on carbon aerogel-modified carbon fibre electrodes with copper current collectors. In common with many structural power embodiments, scale-up of these devices is currently limited by large internal resistances and the mass associated with current collection. There is a trade-off between the overall resistive power loss and the additional mass for the current collector material. However, in these devices, mechanical integrity is provided by the structural electrodes, allowing a range of collector designs to be considered. Using finite element simulations, these current collection strategies are explored quantitatively across a range of design space variables. The key conductivity parameters were measured experimentally, using the best existing materials, to inform direct current conduction simulations of the electrode/current collector assembly. For the present device configuration, the performance trade-off is governed by the area of the current collector. The most effective near-term strategy for power loss mitigation lies in reducing the contact resistance; however, improvements can also be obtained by modifying the collector geometry. The findings of this paper can be generalised to other structural power composites and monofunctional energy storage devices, which are relevant in many mass-sensitive electrochemical applications.
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影响因子：
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作者：
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DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
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通讯作者：
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影响因子：
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作者：
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