Ultrathin Ni-Co double hydroxide nanosheets with conformal graphene coating for highly active oxygen evolution reaction and lithium ion battery anode materials
发表时间：2019-03-11
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- 论文类型：
- 期刊论文
- 第一作者：
- Shi, Jianhang
- 通讯作者：
- 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.
- 合写作者：
- Du, Naixu,Zheng, Wenji,Li, Xiangcun,Dai, Yan,He, Gaohong
- 发表时间：
- 2017-11-01
- 发表刊物：
- CHEMICAL ENGINEERING JOURNAL
- 收录刊物：
- SCIE、EI
- 文献类型：
- J
- 卷号：
- 327
- 页面范围：
- 9-17
- ISSN号：
- 1385-8947
- 关键字：
- Ni-Co hydroxides; Oxygen evolution reaction; Lithium ion battery; Graphene; Electrodeposition
- 摘要：
- 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.
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- 否
