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Highly‐Dispersed Ni‐QDs/Mesoporous Carbon Nanoplates: A Universal and Commercially Applicable Approach Based on Corn Straw Piths and High Capacitive Performances
Author(s) -
Su Liwei,
Hei Jinpei,
Wu Xianbin,
Wang Lianbang,
Wang Yuanhao
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500272
Subject(s) - materials science , mesoporous material , nanotechnology , anode , carbon fibers , quantum dot , capacitance , lithium (medication) , chemical engineering , catalysis , composite number , chemistry , electrode , composite material , biochemistry , engineering , medicine , endocrinology
Metal and metal oxides are extremely competitive in various applications such as catalysis and energy storage, while the intrinsically unsatisfactory ion/electron conductivity and/or large volume swing severely inhibit their inherent potentials. Quantum dots (QDs) can significantly promote the conductivity, buffer volume variation, and introduce novel physical/chemical properties, especially in cooperation with mesoporous carbon (MC), and hence are attracting ever‐increasing attention. However, it is still a worldwide challenge to exploit a facile, efficient, environmentally benign, commercially applicable, and, in particular, universal method for varied QDs/MC hybrids. In this work, a powerful approach is proposed on basis of corn straw piths, and a synthetic mechanism is proposed and investigated systematically. According to this route, Ni, Co, Cu, and MnO QDs/MC nanoplates are successfully fabricated. As a typical example, ultrasmall Ni QDs (5–7 nm) are homogeneously distributed on the large surface of MC nanoplates and exhibit a reversible capacitance of 2420 F g −1 at 500 mA g −1 and rate performance. This work discloses a new and paramount path to exploit versatile QDs/MC hybrids for promising applications such as lithium ion batteries, solar cells, Li–air batteries, and other promising fields with electrochemical catalysts.