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2D Metal Zn Nanostructure Electrodes for High‐Performance Zn Ion Supercapacitors
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-11-29 , DOI: 10.1002/aenm.201902981 Geon‐Hyoung An 1, 2 , John Hong 3 , Sangyeon Pak 4 , Yuljae Cho 5 , Sanghyo Lee 5 , Bo Hou 5 , SeungNam Cha 4
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2019-11-29 , DOI: 10.1002/aenm.201902981 Geon‐Hyoung An 1, 2 , John Hong 3 , Sangyeon Pak 4 , Yuljae Cho 5 , Sanghyo Lee 5 , Bo Hou 5 , SeungNam Cha 4
Affiliation
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Recent supercapacitors show a high power density with long‐term cycle life time in energy‐powering applications. A supercapacitor based on a single metal electrode accompanying multivalent cations, multiple charging/discharging kinetics, and high electrical conductivity is a promising energy‐storing system that replaces conventionally used oxide and sulfide materials. Here, a hierarchically nanostructured 2D‐Zn metal electrode‐ion supercapacitor (ZIC) is reported which significantly enhances the ion diffusion ability and overall energy storage performance. Those nanostructures can also be successfully plated on various flat‐type and fiber‐type current collectors by a controlled electroplating method. The ZIC exhibits excellent pseudocapacitive performance with a high energy density of 208 W h kg−1 and a power density from 500 W kg−1, which are significantly higher than those of previously reported supercapacitors with oxide and sulfide materials. Furthermore, the fiber‐type ZIC also shows high energy‐storing performance, outstanding mechanical flexibility, and waterproof characteristics, without any significant capacitance degradation during bending tests. These results highlight the promising possibility of nanostructured 2D Zn metal electrodes with the controlled electroplating method for future energy storage applications.
中文翻译：
高性能Zn离子超级电容器的2D金属Zn纳米结构电极
最近的超级电容器在能源应用中显示出高功率密度，并具有长期的循环寿命。基于带有多价阳离子，多种充电/放电动力学和高电导率的单个金属电极的超级电容器是一种很有前途的储能系统，它可以取代常规使用的氧化物和硫化物材料。此处报道了一种分层纳米结构的2D-Zn金属电极-离子超级电容器（ZIC），可显着增强离子扩散能力和整体储能性能。这些纳米结构还可以通过控制电镀方法成功地镀在各种扁平型和纤维型集电器上。ZIC具有出色的伪电容性能，具有208 W h kg -1的高能量密度功率密度为500 W kg -1，明显高于先前报道的含氧化物和硫化物材料的超级电容器。此外，光纤型ZIC还具有高储能性能，出色的机械柔韧性和防水特性，并且在弯曲测试过程中不会出现任何明显的电容衰减。这些结果凸显了采用可控电镀方法的纳米结构二维Zn金属电极在未来储能应用中的广阔前景。
更新日期：2020-01-22
中文翻译：
高性能Zn离子超级电容器的2D金属Zn纳米结构电极
最近的超级电容器在能源应用中显示出高功率密度，并具有长期的循环寿命。基于带有多价阳离子，多种充电/放电动力学和高电导率的单个金属电极的超级电容器是一种很有前途的储能系统，它可以取代常规使用的氧化物和硫化物材料。此处报道了一种分层纳米结构的2D-Zn金属电极-离子超级电容器（ZIC），可显着增强离子扩散能力和整体储能性能。这些纳米结构还可以通过控制电镀方法成功地镀在各种扁平型和纤维型集电器上。ZIC具有出色的伪电容性能，具有208 W h kg -1的高能量密度功率密度为500 W kg -1，明显高于先前报道的含氧化物和硫化物材料的超级电容器。此外，光纤型ZIC还具有高储能性能，出色的机械柔韧性和防水特性，并且在弯曲测试过程中不会出现任何明显的电容衰减。这些结果凸显了采用可控电镀方法的纳米结构二维Zn金属电极在未来储能应用中的广阔前景。
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