Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong , Innovation Campus, Squires Way, North Wollongong, New South Wales 2500, Australia.
Hunnan Key Laboratory of Micro-Nano Energy Materials and Devices, Xiangtan University , Hunan 411105, PR China.
ACS Appl Mater Interfaces. 2017 Jul 26;9(29):24446-24450. doi: 10.1021/acsami.7b07615. Epub 2017 Jul 17.
Room-temperature sodium-sulfur batteries are competitive candidates for large-scale stationary energy storage because of their low price and high theoretical capacity. Herein, pure S nanosheet cathodes can be grown in situ on three-dimensional Cu foam substrate with the condensation between binary polymeric binders, serving as a model system to investigate the formation and electrochemical mechanism of unique S nanosheets on the Cu current collectors. On the basis of the confirmed conversion reactions to NaS, The constructed cathode exhibits ultrahigh initial discharge/charge capacity of 3189/1403 mAh g. These results suggest that there is great potential to optimize S cathode by exploiting low-cost Cu substrates instead of conventional Al current collectors.
室温钠-硫电池因其价格低廉、理论容量高，是大型固定储能的极具竞争力的候选者。在此，采用二元聚合物粘结剂的缩合反应，可在三维 Cu 泡沫基底上原位生长纯 S 纳米片阴极，作为一个模型体系来研究独特的 S 纳米片在 Cu 集流体上的形成和电化学机理。基于证实的转化反应为 NaS，所构建的阴极表现出超高的初始放电/充电容量 3189/1403 mAh g-1。这些结果表明，通过利用低成本的 Cu 基底代替传统的 Al 集流器来优化 S 阴极具有很大的潜力。
