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Title:
Modulating structural hierarchies of manganese oxide in morphology and porosity by marine biopolymer for improved supercapacitors
Author: Zong, Lu1,2; Wu, Xiaochen1; You, Jun1; Li, Mingjie1; Li, Chaoxu1,2,3
Source: ELECTROCHIMICA ACTA
Issued Date: 2016-09-20
Volume: 213, Pages:709-716
Keyword: hierarchical nanostructure ; manganese oxide ; marine biopolymer ; supercapacitors
DOI: 10.1016/j.electacta.2016.07.158
DOC Type: Article
English Abstract: Nanostructured MnO2 is one of the most promising electrode materials for supercapacitors (SCs) on account of its exceptional properties including high theoretical capacitance, natural abundance, environmental safety and low cost. However its merits cannot be fully embodied by its current synthesis approaches, since most of them were normally tedious, costly, low yield or environment unfriendly, and poor in controlling multiple parameters of MnO2. Inspired by biopolymer-assisted synthesis of hierarchical inorganic materials in living systems, a marine biopolymer was used for structure-controllable synthesis of MnO2 in this study. Functioning as the reductant, surfactant and directing agent, alginate could tune the hierarchical architecture of MnO2 in multiple parameters including the dimension, nanometric size, crystallographic form and porosity, where delta-MnO2 nanocrystals with the size of 5 similar to 10 nm first assembled into nanosheets, and then flower-like structure with particle size tunable within 40 similar to 200 nm as well as micro-and mesopores. Due to these unique hierarchies in both the morphology and porosity, as-prepared MnO2 exhibited excellent performance as SC electrode, e.g. high power density (32.5 kW kg(-1)), high energy density (75.1 Wh kg(-1)) and great cycling stability. Given the green, low-temperature and scalable one-step process, this synthesis may pave a highly promising way to massive production of MnO2 electrode materials for SCs. (C) 2016 Elsevier Ltd. All rights reserved.
WOS Headings: Science & Technology ; Physical Sciences
WOS Subject: Electrochemistry
WOS Subject Extended: Electrochemistry
WOS Keyword Plus: HIGH-PERFORMANCE SUPERCAPACITOR ; ASYMMETRIC SUPERCAPACITORS ; ENERGY DENSITY ; HYDROTHERMAL SYNTHESIS ; DELTA-MNO2 NANOSHEETS ; ELECTRODE MATERIALS ; CARBON NANOSHEETS ; ABALONE NACRE ; HIGH-POWER ; MNO2
Indexed Type: SCI ; ISTP
Language: 英语
WOS ID: WOS:000382251900088
Citation statistics:
Content Type: 期刊论文
URI: http://ir.qibebt.ac.cn/handle/337004/8492
Appears in Collections:仿生智能材料团队_期刊论文

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description.institution: 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, 189 Songling Rd, Qingdao 266101, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Qingdao Univ, Collaborat Innovat Ctr Marine Biomass Fibers Mat, 308 Ningxia Rd, Qingdao 266071, Peoples R China

Recommended Citation:
Zong, Lu,Wu, Xiaochen,You, Jun,et al. Modulating structural hierarchies of manganese oxide in morphology and porosity by marine biopolymer for improved supercapacitors[J]. ELECTROCHIMICA ACTA,2016,213:709-716.
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