Heteroatom enhanced sodium ion capacity and rate capability in a hydrogel derived carbon give record performance in a hybrid ion capacitor
Heteroatom enhanced sodium ion capacity and rate capability in a hydrogel derived carbon give record performance in a hybrid ion capacitor
复制标题
DOI：
10.1016/j.nanoen.2016.03.014
复制
发表时间：
2016-05-01
期刊：
影响因子：
17.6
通讯作者：
Mitlin, David
中科院分区：
文献类型：
--
作者：
Ding, Jia;Li, Zhi;Mitlin, David
我们采用聚吡咯水凝胶前体来产生碳框架，该碳框架具有巨大的杂原子含量（13重量%氮和11重量%氧）和高表面积（945 m2 g-1），其在微孔和中孔之间平分。由该N和O官能化碳（NOFC）制成的钠离子电容器（NIC，HIC）电极具有巨大的可逆容量和倍率容量，例如在100 mA g（-1）下为437 mA h g（-1），在1600 mA g（-1）下为185 mA h g（-1）。这是最有利的报道之一，并且是由于丰富的纳米孔隙率，其使得能够在许多N和O部分和石墨烯缺陷处进行快速离子吸附。NOFC使NIC装置具有能量-功率特性，其不仅对于Na混合物是最先进的，而且对于竞争的Li系统也是最先进的：Ragone图表放置分别在67 W kg（-1）和14，550 W kg（-1）下为111 W h kg（-1）和38 W h kg（-1），在超过5000次充电/放电循环下具有90%的容量保持率。(C)2016爱思唯尔有限公司版权所有
We employed a polypyrrole hydrogel precursor to create a carbon framework that possesses both huge heteroatom content (13 wt% nitrogen and 11 wt% oxygen) and high surface area (945 m(2) g(-1)) that is equally divided between micropores and mesopores. A sodium ion capacitor (NIC, HIC) electrode fabricated from this N and O Functionalized Carbon (NOFC) has tremendous reversible capacity and rate capability, e.g. 437 mA h g(-1) at 100 mA g(-1), and 185 mA h g(-1) at 1600 mA g(-1). This is among the most favorable reported, and is due to copious nanoporosity that enables fast ion sorption at the many N and O moieties and graphene defects. The NOFC imbues a NIC device with energy -power characteristics that are not only state-of-the-art for Na hybrids, but also rival Li systems: Ragone chart placement is 111 W h kg(-1) and 38 W h kg(-1) at 67 W kg(-1) and 14,550 W kg(-1), respectively, with 90% capacity retention at over 5000 charge/discharge cycles. (C) 2016 Elsevier Ltd. All rights reserved.