Environmentally-friendly aqueous Li (or Na)-ion battery with fast electrode kinetics and super-long life.
Environmentally-friendly aqueous Li (or Na)-ion battery with fast electrode kinetics and super-long life.
复制标题
具有快速电极动力学和超长寿命的环保水系锂（或钠）离子电池
DOI：
10.1126/sciadv.1501038
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发表时间：
2016-01
期刊：
影响因子：
13.6
通讯作者：
Xia Y
中科院分区：
文献类型：
--
作者：
Dong X;Chen L;Liu J;Haller S;Wang Y;Xia Y
超长寿命环保型水溶液锂（或钠）离子电池是为大规模储能而打造的。目前的可再充电电池通常显示出有限的循环寿命和缓慢的电极动力学，并且包含对环境不友好的组分。此外，它们的操作取决于金属元素的氧化还原反应。我们提出了一个原始的电池系统，该系统依赖于液体阴极中I−/I3−电对的氧化还原和聚酰亚胺阳极中的可逆烯醇化，伴随着Li+（或Na+）通过Li+/Na+交换聚合物膜在阴极和阳极之间的扩散。这种电池中没有基于金属元素的氧化还原反应，Li+（或Na+）仅用于电荷转移。此外，该系统的组分（电解质/电极）是环境友好的。两个电极都被证明具有非常快的动力学，这使得电池具有超级电容器般的高功率。当在0至1.6 V的电化学窗口内运行时，它甚至可以循环50，000次。
Environmentally-friendly aqueous Li (or Na)-ion battery with super-long life is built for large-scale energy storage. Current rechargeable batteries generally display limited cycle life and slow electrode kinetics and contain environmentally unfriendly components. Furthermore, their operation depends on the redox reactions of metal elements. We present an original battery system that depends on the redox of I−/I3− couple in liquid cathode and the reversible enolization in polyimide anode, accompanied by Li+ (or Na+) diffusion between cathode and anode through a Li+/Na+ exchange polymer membrane. There are no metal element–based redox reactions in this battery, and Li+ (or Na+) is only used for charge transfer. Moreover, the components (electrolyte/electrode) of this system are environment-friendly. Both electrodes are demonstrated to have very fast kinetics, which gives the battery a supercapacitor-like high power. It can even be cycled 50,000 times when operated within the electrochemical window of 0 to 1.6 V. Such a system might shed light on the design of high-safety and low-cost batteries for grid-scale energy storage.