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[资源] Nature Materials 多功能单离子聚合物电解质文章Single-ion BAB triblock copolymers

最近，Nature Materials上由法国科学家新发表的一篇关于多功能单离子聚合物电解质的文章——Single-ion BAB triblock copolymers as highly efficient electrolytes for lithium-metal batteries，由于液体和固体电解质的本身的一些缺陷限制了他们在锂离子电池中的应用，本文作者开发了新型的聚合物电解质，该电解质是基于聚苯乙烯片段组成的多阴离子嵌段共聚物，其锂离子传递数接近1，并具有极好的机械性能和稳定的5V电化学窗口，由此组成的电池性能超过传统的基于聚合物的电池。
Electrochemical energy storage is one of the main societal challenges of this century. The performances of classical lithium-ion technology based on liquid electrolytes have made great advances in the past two decades, but the intrinsic instability of liquid electrolytes results in safety issues. Solid polymer electrolytes would be a perfect solution to those safety issues, miniaturization and enhancement of energy density. However, as in liquids, the fraction of charge carried by lithium ions is small (<20%), limiting the power performances. Solid polymer electrolytes operate at 80 °C, resulting in poor mechanical properties and a limited electrochemical stability window. Here we describe a multifunctional single-ion polymer electrolyte based on polyanionic block copolymers comprising polystyrene segments. It overcomes most of the above limitations, with a lithium-ion transport number close to unity, excellent mechanical properties and an electrochemical stability window spanning 5 V versus Li+/Li. A prototype battery using this polyelectrolyte outperforms a conventional battery based on a polymer electrolyte.
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[ 来自科研家族锂电池世界 ]

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附件 1 : Single-ionBABtriblockcopolymersashighlyefficientelectrolytesforlithium-metalbatteries.pdf

2013-04-08 10:30:24, 602.56 K