Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Controlled synthesis of manganese oxyhydroxide nanotubes
T2 - implications for high-efficiency supercapacitors
AU - Tan, Hui Teng
AU - Rui, Xianhong
AU - Shi, Wenhui
AU - Xu, Chen
AU - Yu, Hong
AU - Hoster, Harry E.
AU - Yan, Qingyu
PY - 2013/6
Y1 - 2013/6
N2 - Successful attempts have been made to control the synthesis of tubular MnOOH with nanodimensions on high electronic conductivity graphite felt (GF) to be used as a flexible supercapacitor electrode. As a fundamental study, the time-dependent kinetics was investigated to interpret its formation mechanism, which can be depicted as the curling of a two-dimensional precursor into a one-dimensional structure with a hollow interior. As a result of the nanotube structure, the active surface area of MnOOH is completely accessible to electrolyte ions and has a shorter charge-transport length and greater ability to withstand structural deformation. Hence, hollow-structured MnOOH shows great promise as an electrochemical system, which is reflected in its high specific capacitance of 1156Fg-1 at 1Ag-1. Furthermore, the high energy density of 1125Whkg-1 and power density of 5.05kWkg-1 reveal the outstanding energy-storage behavior of the MnOOH/GF composites as flexible supercapacitor electrodes.
AB - Successful attempts have been made to control the synthesis of tubular MnOOH with nanodimensions on high electronic conductivity graphite felt (GF) to be used as a flexible supercapacitor electrode. As a fundamental study, the time-dependent kinetics was investigated to interpret its formation mechanism, which can be depicted as the curling of a two-dimensional precursor into a one-dimensional structure with a hollow interior. As a result of the nanotube structure, the active surface area of MnOOH is completely accessible to electrolyte ions and has a shorter charge-transport length and greater ability to withstand structural deformation. Hence, hollow-structured MnOOH shows great promise as an electrochemical system, which is reflected in its high specific capacitance of 1156Fg-1 at 1Ag-1. Furthermore, the high energy density of 1125Whkg-1 and power density of 5.05kWkg-1 reveal the outstanding energy-storage behavior of the MnOOH/GF composites as flexible supercapacitor electrodes.
KW - electrochemistry
KW - graphite
KW - manganese
KW - nanotubes
KW - organic-inorganic hybrid composites
KW - ENERGY-STORAGE
KW - ELECTROCHEMICAL CAPACITORS
KW - SNO2 NANOTUBES
KW - HYDROTHERMAL SYNTHESIS
KW - LITHIUM STORAGE
KW - HOLLOW SPHERES
KW - CARBON
KW - PERFORMANCE
KW - ELECTRODES
KW - OXIDE
U2 - 10.1002/cplu.201300095
DO - 10.1002/cplu.201300095
M3 - Journal article
VL - 78
SP - 554
EP - 560
JO - ChemPlusChem
JF - ChemPlusChem
SN - 2192-6506
IS - 6
ER -