Indexed by:
期刊论文
First Author:
Shi, Jianhang
Correspondence Author:
Zheng, WJ; Li, XC (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Chem Engn Dept, Linggong Rd 2, Dalian 116024, Peoples R China.
Co-author:
Du, Naixu,Zheng, Wenji,Li, Xiangcun,Dai, Yan,He, Gaohong
Date of Publication:
2017-11-01
Journal:
CHEMICAL ENGINEERING JOURNAL
Included Journals:
SCIE、EI
Document Type:
J
Volume:
327
Page Number:
9-17
ISSN No.:
1385-8947
Key Words:
Ni-Co hydroxides; Oxygen evolution reaction; Lithium ion battery;
Graphene; Electrodeposition
Abstract:
Ultrathin graphene wrapped Ni-Co double hydroxide nanosheets (similar to 10 nm) were synthesized by a facile and rapid electrodeposition process, and evaluated as electrocatalysts for oxygen evolution reaction (OER) and anode materials for Li-ion batteries. The conformal graphene coating on the nanosheets significantly increased the conductivity and surface area of the Ni-Co double hydroxide electrodes. As the OER electrocatalyst, the Ni-Co graphene hybrids show a superior catalytic activity with a small Tafel slope of 67 mV per decade due to the synergy between the abundant active sites of the Ni-Co hydroxides and the conductive graphene coating, and a modest overpotential of 280 mV at a current density of 10 mA cm(-2). Impressively, the electrodes exhibit an excellent stability evaluated by chronopotentiometry under a high current density of 30 mA cm(-2) for 12 h. As Li-ion battery anode, the materials show a high specific capacity of 373 mA h g(-1) up to 500 cycles even at a high current density of 1000 mA g(-1). This study provides a new strategy to develop robust and affordable alternative OER catalyst and anode material for high-performance lithium ion batteries. (C) 2017 Elsevier B.V. All rights reserved.
Translation or Not:
no
