博文
应用富磷阻燃锂盐相对安全的锂离子电池
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前几天发一篇危险的高空锂电池, 危险原因就是锂电池不能耐高温.
最近在Angewandte Chemie International Edition看到一篇相关报道,他的阻燃型锂盐用于燃料电池,热稳定温度可以达到200度,锂电池正在向高温高稳定性迈进!
另外在Advanced Materials一个利用Sn4P3阳极材料的钠离子电池也挺有意思,可逆电容量可达718 mA h g−1.
Phosphoryl-Rich Flame-Retardant Ions (FRIONs): Towards Safer Lithium-Ion Batteries†
http://onlinelibrary.wiley.com/doi/10.1002/anie.201310867/abstract
Abstract
The functionalized catecholate, tetraethyl (2,3-dihydroxy-1,4-phenylene)bis(phosphonate) (H2-DPC), has been used to prepare a series of lithium salts Li[B(DPC)(oxalato)], Li[B(DPC)2], Li[B(DPC)F2], and Li[P(DPC)3]. The phosphoryl-rich character of these anions was designed to impart flame-retardant properties for their use as potential flame-retardant ions (FRIONs), additives, or replacements for other lithium salts for safer lithium-ion batteries. The new materials were fully characterized, and the single-crystal structures of Li[B(DPC)(oxalato)] and Li[P(DPC)3] have been determined. Thermogravimetric analysis of the four lithium salts show that they are thermally stable up to around 200 °C. Pyrolysis combustion flow calorimetry reveals that these salts produce high char yields upon combustion.
Tin Phosphide as a Promising Anode Material for Na-Ion Batteries
http://onlinelibrary.wiley.com/doi/10.1002/adma.201305638/abstract
Sn4P3 is introduced for the first time as an anode material for Na-ion batteries. Sn4P3 delivers a high reversible capacity of 718 mA h g−1, and shows very stable cycle performance with negligible capacity fading over 100 cycles, which is attributed to the confinement effect of Sn nanocrystallites in the amorphous phosphorus matrix during cycling.
https://blog.sciencenet.cn/blog-92578-784252.html
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