Investigating battery-supercapacitor material hybrid configurations in energy storage device cycling at 0.1 to 10C rate
Investigating battery-supercapacitor material hybrid configurations in energy storage device cycling at 0.1 to 10C rate
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DOI：
10.1016/j.jpowsour.2023.232762
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发表时间：
2023-03
影响因子：
9.2
通讯作者：
Joseph Paul Baboo;E. Jakubczyk;Mudasir A. Yatoo;Matthew Phillips;Sean Grabe;Matthew Dent;S. Hinder;J. Watts;C. Lekakou
中科院分区：
文献类型：
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作者：
Joseph Paul Baboo;E. Jakubczyk;Mudasir A. Yatoo;Matthew Phillips;Sean Grabe;Matthew Dent;S. Hinder;J. Watts;C. Lekakou
电池-超级电容器混合可以在高达超级电容器容量的高 C 倍率下实现安全充放电操作，同时保持电池寿命。然而，并联的电池-超级电容器系统需要DC/DC转换器来实现电压平衡。本研究探讨了材料层面的杂交，旨在避免使用 DC/DC 转换器。研究了在材料水平上混合的不同电池-超级电容器配置，目的是保持电池的长氧化还原平台并在不需要 DC/DC 转换器的情况下实现自平衡。将这些原理应用于 LiFePO4(LFP) 电池，发现最佳配置是具有 Li 阳极和复合 LFP/活性炭 (AC) 阴极的装置，每克电池阴极达到 180 mAh。该器件根据从 0.1C 到 10C 速率的不同时间表进行循环，并且在根据不同的 C 速率时间表进行循环后，在刚刚制造和事后检验后，对阴极和阳极表面进行微观结构和化学成分的表征。
Battery-supercapacitor hybridisation enables safe charge-discharge operation at high C rate, up to the supercapacitor capacity, while maintaining battery lifetime. However, battery-supercapacitor systems in parallel connection require a DC/DC converter for voltage balance. Hybridisation at material level is explored in this study aiming to avoid the use of a DC/DC converter. Different battery-supercapacitor configurations, hybridised at material level, are investigated with the goal to maintain the long redox plateau of the battery and to self-balance without the need of DC/DC converter. Applying these principles to a LiFePO4(LFP) battery, the best configuration was found to be a device with a Li anode and a composite LFP/activated carbon (AC) cathode reaching 180 mAh per gram of battery cathode. The device is cycled according to different schedules from 0.1C to 10C rate and the cathode and anode surface are characterised microstructurally and in terms of their chemical composition, after just fabricated and post-mortem after cycling according to different C rate schedules.