Aqueous zinc-organic polymer battery with a high rate performance and long lifetime
Aqueous zinc-organic polymer battery with a high rate performance and long lifetime
复制标题
DOI：
10.1038/am.2016.82
复制
发表时间：
2016-07-01
影响因子：
9.7
通讯作者：
Schubert, Ulrich S.
中科院分区：
文献类型：
--
作者：
Haeupler, Bernhard;Roessel, Carsten;Schubert, Ulrich S.
通过铑（Rh）催化2-乙炔基（exTTF）的聚合，合成了一种新型的基于9，10-二（1，3-二硫醇-2-亚基）-9，10-二氢蒽（exTTF）与共轭主链的氧化还原活性聚合物，得到了具有低多分散性的聚合物。含有该聚合物的复合电极在水介质中表现出化学可逆的双电子氧化。将这些电极作为活性阴极材料应用于使用水性电解质的混合锌-有机电池中，能够生产理论容量为133 mAh g（-1）的空气稳定电荷存储系统。这些电池具有高性能，充电/放电速率高达120 C（30 s）和超长寿命，超过10 000次充电/放电循环（伴随着14%的轻微容量损失）。最后，该聚合物与其非共轭衍生物进行了比较，揭示了由于提高了聚合物链内的电子转移，共轭主链对材料活性的积极影响。
A novel redox-active polymer based on a 9,10-di(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene (exTTF) system in combination with a conjugated backbone was synthesized via rhodium (Rh)-catalyzed polymerization of 2-ethynyl(exTTF), leading to polymers with low polydispersities. Composite electrodes containing this polymer exhibited chemically reversible two-electron oxidation in aqueous media. The application of these electrodes as active cathode materials in hybrid zinc-organic batteries using an aqueous electrolyte enabled the production of air-stable charge storage systems with a theoretical capacity of 133 mAh g(-1). These batteries featured high performance, charge/discharge rates of up to 120 C (30 s) and an ultra-long lifetime, of over 10 000 charge/discharge cycles (accompanied by a minor capacity loss of 14%). Finally, the polymer was compared with its nonconjugated derivative, revealing the positive influence of the conjugated backbone on the material activity owing to improved electron transfer within the polymer chain.