Anion secondary batteries utilizing a reversible BF4 insertion/extraction two-dimensional Si material
Anion secondary batteries utilizing a reversible BF4 insertion/extraction two-dimensional Si material
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DOI：
10.1039/c4ta00456f
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发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Okamoto, Hirotaka
中科院分区：
文献类型：
--
作者：
Nakano, Hideyuki;Sugiyama, Yusuke;Okamoto, Hirotaka
轻质、持久的锂离子电池的开发对于混合动力和插电式混合动力电动汽车以及电网应用具有重要的技术意义。在这里，我们报告了一种使用锂阳离子的替代方法，基于 BF4 阴离子摇椅型二次电池的制造。对于负极材料，我们报道了一种硅基化合物[Si10H8(OCH2CH2NH(CH3)(2))(2)](BF4)(2)，它能够在1.8 V的电位下与每个分子式单元的两个BF4阴离子反应，产生80 mAh g(-1)的可逆容量。与锂离子电池相比，这种阴离子电池在热滥用情况下也表现出优越的性能。此外，阴离子电池可在-30摄氏度下工作，在该温度下锂离子电池通常无法工作，因为锂离子在该温度附近通过与碱性有机分子配位而溶剂化。
The development of lightweight, long lasting Li-ion batteries is of great technological importance for hybrid and plug-in hybrid electric vehicles, as well as for power grid applications. Here we report an alternative approach to the use of Li cations, based on the fabrication of BF4 anion rocking-chair-type secondary batteries. For the anode material, we report a Si-based compound, [Si10H8(OCH2CH2NH(CH3)(2))(2)](BF4)(2), which is capable of reacting with two BF4 anions per formula unit at a potential of 1.8 V, giving a reversible capacity of 80 mA h g(-1). This anion battery also showed superior performance under thermal abuse compared with Li-ion batteries. Furthermore, the anion battery is operable at -30 degrees C, a temperature at which Li-ion batteries are generally not operable because Li-ions are solvated by coordination with basic organic molecules around this temperature.