• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Li, Yonghe (Li, Yonghe.) | Wang, Zhenyu (Wang, Zhenyu.) | Zhang, Yuefei (Zhang, Yuefei.) (学者:张跃飞)

收录:

EI Scopus SCIE

摘要:

Hair-like (HL) nanoarchitectures constructed by ultrafine MnOx nanowires (similar to 7 nm) with ultrafine Ag nanoparticles anchored on were synthesized by in situ facile reaction between silver (Ag) nanowires and potassium permanganate (KMnO4), and followed by a following hydrothermal method. Based on a serious of time-dependent experiments, an orderly merged Kirkendall effect and dissolution-recrystallization (Ostwald ripening) mechanism were proposed for the formation of this novel morphology. The as-prepared HL Ag/MnOx nanocomposites as electrode exhibited a high specific capacitance (526 Fg(-1) at scan rate of 5 mV s(-1) and 450 Fg(-1) at current density of 0.1 Ag-1), good rate capability (ca. 45.5% retention with reference to 205 Fg(-1) at 50 times higher current density of 5 Ag-1) and desirable cycle stability (ranging from initial of 237 Fg(-1) to 185 Fg(-1) after 800 cycles and still maintaining 87% retention compared to 800th cycle after another 2800 cycles at current density of 2 Ag-1). Such desirable performance could be attributed to HL Ag/MnOx nanocomposites core (tubular nanosheets) with uniform dispersion of the ultrafine Ag nanoparticals provides a direct pathway for electron transport while the partial connected ultrafine nanowires networks with high specific surface area provides more electronic transmission channels and easy permeation of electrolyte, decreasing the polarization of the electrode and thus enhancing the discharge capacity and high-rate capability. (C) 2015 Elsevier B.V. All rights reserved.

关键词:

Ostwald ripening Kirkendall effect Supercapacitor Nanowire Ultrafine Ag/MnOx

作者机构:

  • [ 1 ] [Li, Yonghe]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Zhenyu]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 3 ] [Zhang, Yuefei]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

通讯作者信息:

  • 张跃飞

    [Zhang, Yuefei]Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

电子邮件地址:

查看成果更多字段

相关关键词:

相关文章:

来源 :

JOURNAL OF ALLOYS AND COMPOUNDS

ISSN: 0925-8388

年份: 2015

卷: 644

页码: 47-53

6 . 2 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:319

JCR分区:1

中科院分区:1

被引次数:

WoS核心集被引频次: 11

SCOPUS被引频次: 11

ESI高被引论文在榜: 0 展开所有

万方被引频次:

中文被引频次:

近30日浏览量: 3

在线人数/总访问数:149/4298839
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司