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首页> 外文会议>International Advanced Automotive Battery Conference(AABC) and Ultracapacitor Conference; 20060517-19; Baltimore,MD(US) >Influence of Graphite Choice on Lithium Plating in Li-Ion Cells at -30℃
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Influence of Graphite Choice on Lithium Plating in Li-Ion Cells at -30℃

机译：-30℃下石墨选择对锂离子电池镀锂的影响

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摘要

The most surprising finding from this work was that the impedance rise at low temperature was not significantly impacted by the choice of graphite or even the choice in active material. The main rise in impedance occurs in the mid-frequency range. Processes that occur in this frequency range are generally interfacial in nature. This means that the responsible phenomenon is independent of the active material and is most likely an electrolyte-interface effect. It should be noted that materials with high surface areas do appear to help the power performance at low temperature, but this is only part of the solution. Cells based on hard carbon and Li_4Ti_5O_(12) as the negative electrode were much less likely to deposit lithium because they operate at potentials well above lithium potential. Efforts are underway to investigate the influence of electrolyte properties such as composition, viscosity, density, and wettability at low temperature.
机译：这项工作最令人惊讶的发现是，在低温下阻抗的升高并不受石墨的选择甚至活性材料的选择的显着影响。阻抗的主要上升出现在中频范围内。在此频率范围内发生的过程通常是界面性质的。这意味着负责任的现象与活性材料无关，并且很可能是电解质界面效应。应该注意的是，具有高表面积的材料确实有助于降低低温下的功率性能，但这只是解决方案的一部分。基于硬碳和Li_4Ti_5O_（12）作为负极的电池沉积锂的可能性要低得多，因为它们的工作电压远高于锂电势。正在努力研究电解质性能的影响，例如组成，粘度，密度和低温下的润湿性。

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