期刊
JOURNAL OF POWER SOURCES
卷 435, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.226812
关键词
Zn-Co; Ni-Co; Layered double hydroxide; 3D graphene; Nanosheet; Pseudocapacitor
资金
- National Research Foundation of Korea [NRF-2017R1C1B2010906, NRF-2017M1A2A2048904]
Herein, we report a simple one pot all hydrothermal synthesis route to grow nano structure of zinc-cobalt (Zn-Co) @ nickel-cobalt (Ni-Co) layered double hydroxides through oriented attachment growth with ultrathin nano sheets on 3D graphene foam using no additives or oxidants. The pseudocapacitor electrode based on Zn-Co@Ni-Co layered double hydroxides display an enhanced areal capacitance (7485 mFcm(-2), at 5 mVs(-1)) and energy density (1202 mWhcm(-2), at 15 mAcm(-2)) compared to pristine Zn-Co layered double hydroxides, with a greater cycling stability of 108% after 5000 charging-discharging cycles. We fabricate an all solid state symmetrical supercapacitor device with G-Zn-Co@Ni-Co//G-Zn-Co@Ni-Co layered double hydroxides that exhibits an areal capacitance of 1278 mFcm(-2), at 10 mVs(-1) and energy density of 171 mWhcm(-2), at 2.5 mAcm(-2). The credit of superior performance of these pseudocapacitor electrodes is to the easy access of electrolyte to the nanosheets, the conductivity enhancement by 3D graphene foam scaffold and the synergistic effect due to the composite structure of the Zn-Co@Ni-Co layered double hydroxides.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据