Iron oxide encapsulated in nitrogen-doped carbon as high energy anode material for asymmetric supercapacitors
Iron oxide encapsulated in nitrogen-doped carbon as high energy anode material for asymmetric supercapacitors
复制标题
封装在氮掺杂碳中的氧化铁作为不对称超级电容器的高能阳极材料
DOI：
10.1016/j.jpowsour.2019.227047
复制
发表时间：
2019-10
影响因子：
9.2
通讯作者：
Hou Wenhua
中科院分区：
文献类型：
--
作者：
Zhou Jinhua;Xu Shuchi;Ni Lu;Chen Ningna;Li Xiaoge;Lu Chunliang;Wang Xizhang;Peng Luming;Guo Xuefeng;Ding Weiping;Hou Wenhua
提出了一种新的策略，通过将胶体FeOOH与聚苯胺（PANI）自组装，然后进行热解，制备包裹在n掺杂碳（表示为Fe3O4@NC）中的fe3o4。受益于精心设计的异质结构,合成Fe3O4@NC显示了313的超高重量电容 F g−1 1 g−1还提供193 F 15 g−1在高电流密度 g−1,展示一个优秀的性能。此外，它还具有20.25 F cm−3at 1 A g−1的优异体积电容。以Fe3O4@NC为阳极，层状双氢氧化物为阴极，分别制备了非对称超级电容器（ASCs）。com - ldh //Fe3O4@NC ASC器件具有良好的电化学性能，在900 W kg - 1功率密度下能量密度可达35 Wh·kg - 1，在13.5 kW kg - 1功率密度下能量密度可达24 Wh·kg - 1，具有优异的速率能力和良好的循环稳定性。本研究为高性能ASCs新型阳极材料的设计提供了新的思路。
A new strategy is proposed for the preparation of Fe3O4encapsulated in N-doped carbon (denoted as Fe3O4@NC) through a self-assembly of the colloidal FeOOH with polyaniline (PANI) and then a subsequent pyrolysis. Benefiting from the well-designed heterostructure, the resultant Fe3O4@NC shows an ultra-high gravimetric capacitance of 313 F g−1at 1 A g−1and still delivers 193 F g−1at a high current density of 15 A g−1, demonstrating an excellent rate performance. In addition, it has an outstanding volumetric capacitance of 20.25 F cm−3at 1 A g−1. The asymmetric supercapacitors (ASCs) are constructed by using Fe3O4@NC as anode and layered double hydroxides (LDHs) as cathode, respectively. Due to the enlarged voltage window and matched capacity and kinetics, the obtained CoMn-LDH//Fe3O4@NC ASC device shows a remarkable electrochemical performance with a large energy density up to 35 Wh·kg−1at a power density of 900 W kg−1and a high energy density of 24 Wh·kg−1at a power density of 13.5 kW kg−1as well as an excellent rate capability and a good cycling stability. The present work may provide an insight into the design of novel anode materials for high-performance ASCs.
登录
查看更多内容
影响因子：
32.5
作者：
Li, Zhi;Xu, Zhanwei;Mitlin, David
通讯作者：
Mitlin, David
分层 Fe3O4@Fe2O3 核壳纳米棒阵列作为非对称超级电容器的高性能阳极
影响因子：
9.5
作者：
Tang, Xiao;Jia, Ruyue;Xia, Hui
通讯作者：
Xia, Hui
影响因子：
--
作者：
Shi, Wenhui;Zhu, Jixin;Yan, Qingyu
通讯作者：
Yan, Qingyu
影响因子：
29.4
作者：
Qu, Qunting;Yang, Shubin;Feng, Xinliang
通讯作者：
Feng, Xinliang
影响因子：
6.9
作者：
Chavan, Harish S.;Hou, Bo;Kim, Hyungsang
通讯作者：
Kim, Hyungsang