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Title: Rambutan‐like hollow carbon spheres decorated with vacancy‐rich nickel oxide for energy conversion and storage
Authors: Sun, Zixu
Wang, Xinghui
Zhao, Hu
Koh, See Wee
Ge, Junyu
Zhao, Yunxing
Gao, Pingqi
Wang, Guangjin
Li, Hong
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Sun, Z., Wang, X., Zhao, H., Koh, S. W., Ge, J., Zhao, Y., . . . Li, H. (2020). Rambutan‐like hollow carbon spheres decorated with vacancy‐rich nickel oxide for energy conversion and storage. Carbon Energy, 2(1), 122-130. doi:10.1002/cey2.16
Journal: Carbon Energy
Abstract: Transition metal oxides hold great promise for lithium‐ion batteries (LIBs) and electrocatalytic water splitting because of their high abundance and high energy density. However, designing and fabrication of efficient, stable, high power density electrode materials are challenging. Herein, we report rambutan‐like hollow carbon spheres formed by carbon nanosheet decorated with nickel oxide (NiO) rich in metal vacancies (denoted as h ‐NiO/C) as a bifunctional electrode material for LIBs and electrocatalytic oxygen evolution reaction (OER). When being used as the anode of LIBs, the h ‐NiO/C electrode shows a large initial capacity of 885 mA h g−1, a robust stability with a high capacity of 817 mA h g−1 after 400 cycles, and great rate capability with a high reversible capacity of 523 mA h g−1 at 10 A g−1 after 600 cycles. Moreover, working as an OER electrocatalyst, the h ‐NiO/C electrode shows a small overpotential of 260 mV at 10 mA cm−2, a Tafel slope of 37.6 mV dec−1 along with good stability. Our work offers a cost‐effective method for the fabrication of efficient electrode for LIBs and OER.
ISSN: 2637-9368
DOI: 10.1002/cey2.16
Schools: School of Electrical and Electronic Engineering 
School of Mechanical and Aerospace Engineering 
Organisations: Centre for Micro‐/N ano‐electronics(NOVITAS)
Rights: © 2019 The Authors. Carbon Energy published by Wenzhou University and John Wiley & Sons Australia, Ltd. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in anymedium, provided the original work is properly cited and is not used for commercial purposes.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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