High-Energy and High-Power Primary Li-CFx Batteries Enabled by the Combined Effects of the Binder and the Electrolyte
High-Energy and High-Power Primary Li-CFx Batteries Enabled by the Combined Effects of the Binder and the Electrolyte
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DOI：
10.3390/batteries9050268
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发表时间：
2023-03
期刊：
影响因子：
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通讯作者：
Haobin Huo;Sivaviswa Radhakrishnan;L. Shaw;K. Németh
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文献类型：
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作者：
Haobin Huo;Sivaviswa Radhakrishnan;L. Shaw;K. Németh
最近已经开发了几种有效的方法来证明锂-碳氟化物（Li-CFx）电池中同时具有高能量和高功率密度。这些方法可以在纽扣电池中在60-70 kW/kg功率密度（40-50 C速率）下实现高达1000 Wh/kg的能量密度，并且在软包电池中在12.5 kW/kg功率密度（20 C速率）下实现750 Wh/kg的能量密度。这种性能是通过巧妙的纳米结构设计、可控孔隙率、硼掺杂和电解质添加剂实现的。在本研究中，我们表明，类似的伟大的性能，在59千瓦/千克的功率密度，931瓦时/千克的能量密度，可以通过使用聚丙烯腈粘合剂和锂氟化石墨硬币电池中的LiBF 4电解质实现。我们还证明，所观察到的效果是粘合剂和电解质的正确组合的结果。我们建议，所观察到的现象的机械起源是聚丙烯腈粘合剂的电催化效应。虽然我们提出的方法具有竞争力的性能，但它也提供了一种简单的实施方式和高能量和高功率原锂CFx电池的可扩展生产。
Several effective methods have been developed recently to demonstrate simultaneous high energy and high power density in Lithium - carbon fluoride (Li-CFx) batteries. These methods can achieve as high as a 1000 Wh/kg energy density at a 60–70 kW/kg power density (40–50 C rate) in coin cells and a 750 Wh/kg energy density at a 12.5 kW/kg power density (20 C rate) in pouch cells. This performance is made possible by an ingenious nano-architecture design, controlled porosity, boron doping, and electrolyte additives. In the present study, we show that a similarly great performance, a 931 Wh/kg energy density at a 59 kW/kg power density, can be achieved by using a polyacrylonitrile binder and a LiBF4 electrolyte in Li-graphite fluoride coin cells. We also demonstrate that the observed effect is the result of the right combination of the binder and the electrolyte. We propose that the mechanistic origin of the observed phenomena is an electro-catalytic effect of the polyacrylonitrile binder. While our proposed method has a competitive performance, it also offers a simple implementation and a scalable production of high-energy and high-power primary Li-CFx cells.