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Title: Vertically-aligned Mn(OH)2 nanosheet films for flexible all-solid-state electrochemical supercapacitors

Abstract

We report that the arrangement of the electrode materials is a significant contributor for constructing high performance supercapacitor. Here, vertically-aligned Mn(OH)2 nanosheet thin films were synthesized by cathodic electrodeposition technique on flexible Au coated polyethylene terephthalate substrates. Morphologies, microstructures, chemical compositions and valence state of the nanosheet films were characterized systematically. It shows that the nanosheets arranged vertically to the substrate, forming a porous nanowall structures and creating large open framework, which greatly facilitate the adsorption or diffusion of electrolyte ions for faradaic redox reaction. Electrochemical tests of the films show the specific capacitance as high as 240.2 F g-1 at 1.0 A g-1. The films were employed to assemble symmetric all-solid-state supercapacitors with LiCl/PVA gel severed as solid electrolyte. Finally, the solid devices exhibit high volumetric capacitance of 39.3 mF cm-3 at the current density 0.3 mA cm-3 with robust cycling stability. The superior performance is attributed to the vertically-aligned configuration.

Authors:
 [1]; ORCiD logo [1];  [1];  [1];  [2];  [2];  [2];  [3]
  1. Hohai University, Nanjing (China). College of Science
  2. Hohai University, Nanjing (China). College of mechanics and materials
  3. Ames Lab., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1409844
Report Number(s):
IS-J-9492
Journal ID: ISSN 0957-4522; PII: 7689; TRN: US1703203
Grant/Contract Number:  
AC02-07CH11358; 11104062; 2015B22313; 2016B46014
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Science Materials in Electronics
Additional Journal Information:
Journal Volume: 28; Journal Issue: 23; Journal ID: ISSN 0957-4522
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Manganese hydroxide; Electrodeposition; All-solid-state Supercapacitors; Flexibility

Citation Formats

Yang, Ziyuan, Gong, Jiangfeng, Tang, Chunmei, Zhu, Weihua, Cheng, Zhaojun, Jiang, Jinghua, Ma, Aibin, and Ding, Qingping. Vertically-aligned Mn(OH)2 nanosheet films for flexible all-solid-state electrochemical supercapacitors. United States: N. p., 2017. Web. doi:10.1007/s10854-017-7689-5.
Yang, Ziyuan, Gong, Jiangfeng, Tang, Chunmei, Zhu, Weihua, Cheng, Zhaojun, Jiang, Jinghua, Ma, Aibin, & Ding, Qingping. Vertically-aligned Mn(OH)2 nanosheet films for flexible all-solid-state electrochemical supercapacitors. United States. doi:10.1007/s10854-017-7689-5.
Yang, Ziyuan, Gong, Jiangfeng, Tang, Chunmei, Zhu, Weihua, Cheng, Zhaojun, Jiang, Jinghua, Ma, Aibin, and Ding, Qingping. Mon . "Vertically-aligned Mn(OH)2 nanosheet films for flexible all-solid-state electrochemical supercapacitors". United States. doi:10.1007/s10854-017-7689-5. https://www.osti.gov/servlets/purl/1409844.
@article{osti_1409844,
title = {Vertically-aligned Mn(OH)2 nanosheet films for flexible all-solid-state electrochemical supercapacitors},
author = {Yang, Ziyuan and Gong, Jiangfeng and Tang, Chunmei and Zhu, Weihua and Cheng, Zhaojun and Jiang, Jinghua and Ma, Aibin and Ding, Qingping},
abstractNote = {We report that the arrangement of the electrode materials is a significant contributor for constructing high performance supercapacitor. Here, vertically-aligned Mn(OH)2 nanosheet thin films were synthesized by cathodic electrodeposition technique on flexible Au coated polyethylene terephthalate substrates. Morphologies, microstructures, chemical compositions and valence state of the nanosheet films were characterized systematically. It shows that the nanosheets arranged vertically to the substrate, forming a porous nanowall structures and creating large open framework, which greatly facilitate the adsorption or diffusion of electrolyte ions for faradaic redox reaction. Electrochemical tests of the films show the specific capacitance as high as 240.2 F g-1 at 1.0 A g-1. The films were employed to assemble symmetric all-solid-state supercapacitors with LiCl/PVA gel severed as solid electrolyte. Finally, the solid devices exhibit high volumetric capacitance of 39.3 mF cm-3 at the current density 0.3 mA cm-3 with robust cycling stability. The superior performance is attributed to the vertically-aligned configuration.},
doi = {10.1007/s10854-017-7689-5},
journal = {Journal of Materials Science Materials in Electronics},
number = 23,
volume = 28,
place = {United States},
year = {2017},
month = {8}
}

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