Towards a Pseudocapacitive Battery: Benchmarking the Capabilities of Quantized Capacitance for Energy Storage
Towards a Pseudocapacitive Battery: Benchmarking the Capabilities of Quantized Capacitance for Energy Storage
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DOI：
10.1103/prxenergy.1.013007
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发表时间：
2022-06
期刊：
影响因子：
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通讯作者：
Yee Wei Foong;Javad Shirani;Shuaishuai Yuan;C. A. Howard;K. Bevan
中科院分区：
文献类型：
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作者：
Yee Wei Foong;Javad Shirani;Shuaishuai Yuan;C. A. Howard;K. Bevan
尽管能够非常快速地充电，但电化学电容器的赝电容特性仍然需要大量的研究才能获得与电池相当的能量密度。在这里，我们讨论和理论基准的物理量子化电容作为法拉第电荷存储机制，提供接近“理想”的赝电容特性的背景下，电池般的能量存储。通过仔细的电解质和反应物工程，我们的物理分析表明，这种较少探索的“赝电容电池”机制可以提供约10 - 4 W/L的功率密度与100 Wh/L（或可能更大）的范围内的体积能量密度相结合。这些基准是通过考虑溶剂化、电子-电子相互作用和电子转移过程的影响对二维（2D）石墨纳米颗粒进行全面分析而得出的。总的来说，我们的发现表明，表现出量子化电容的2D纳米材料在电化学电容器中提供了一个有前途的和未被探索的物理轴，以实现与电池相当的能量密度的非常快速的充电。
Despite being capable of very fast charging, the pseudocapacitive properties of electrochemical capacitors still require significant research to attain energy densities comparable to that of batteries. Herein we discuss and theoretically benchmark the physics of quantized capacitance as a Faradaic charge storage mechanism, providing near “ideal” pseudocapacitive properties in the context of batterylike energy storage. Through careful electrolyte and reactant engineering, our physical analysis suggests that this less explored “pseudocapacitive battery” mechanism could provide power densities of approximately 10 4 W/L combined with volumetric energy densities in the range of 100 Wh/L (or potentially greater). These benchmarks are arrived at though a comprehensive analysis of two-dimensional (2D) graphitic nanoparticles considering the impact of solvation, electron-electron interactions, and electron transfer processes. In general, our findings indicate that 2D nanomaterials exhibiting quantized capacitance provide a promising and underexplored physical axis within electrochemical capacitors towards realizing very fast charging at energy densities comparable to that of batteries.