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首页> 外文会议>National Meeting Exhibition >HIGH ENERGY DENSITY SILICON ANODES FOR LITHIUM-ION BATTERIES: COMBINING HOLLOW NANOSPHERES WITH CONDUCTIVE POLYMER BINDER
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HIGH ENERGY DENSITY SILICON ANODES FOR LITHIUM-ION BATTERIES: COMBINING HOLLOW NANOSPHERES WITH CONDUCTIVE POLYMER BINDER

机译：用于锂离子电池的高能密度硅阳极：将中空纳米球与导电聚合物粘合剂组合

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摘要

High energy density batteries with long cycle life are critical for various energy storage applications. Alloying electrodes, such as silicon, react with lithium at low potential and offer much greater theoretical specific capacity than graphite. The alloying reaction of Si with lithium, however, causes significant volume expansion during lithiation process and lead to the fracture of Si particles because of huge lithiation-induced mechanical stress. Various approaches with different focus, such as nanoengieering Si anode structures, stabilizing solid-electrolyte interphases between Si and organic electrolyte, and synthesizing new polymer binders to accommodate the volume change, have been shown successfully improving the energy density and cycle life, bringing Si anodes one step closer into practical Li-ion batteries. In this preprint, we show that both the active hollow nanospheres Si anode structure and the inactive conductive polymer binder have significant impact on the anode cycling performance. Combining the hollow nanospheres with conductive polymer binder, long cycle life Si anode is demonstrated at high energy density.
机译：具有长循环寿命的高能量密度电池对于各种能量存储应用至关重要。合金电极，例如硅，与低电位的锂反应，提供比石墨更大的理论特异性。然而，Si与锂的合金化反应导致锂化过程中的大量膨胀，并导致Si颗粒的骨折由于巨大的锂纤维化诱导的机械应力。具有不同焦点的各种方法，例如纳米工程Si阳极结构，稳定在Si和有机电解质之间的固体电解质差异，以及合成新的聚合物粘合剂以适应体积变化，已成功地改善能量密度和循环寿命，使Si阳极升高一步更接近实用的锂离子电池。在该预印刷本中，我们表明，活性空心纳米球Si阳极结构和无活性导电聚合物粘合剂对阳极循环性能产生显着影响。将中空纳米球与导电聚合物粘合剂组合，在高能量密度下对长循环寿命SI阳极进行了说明。

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