Ni(OH)2 nanoplates grown on graphene as advanced electrochemical pseudocapacitor materials.

By Hailiang Wang, H. S. Casalongue, Yongye Liang, Hongjie Dai. Journal of the American Chemical Society, 2010

1,936 citations recorded by the source corpus.

Ni(OH)(2) nanocrystals grown on graphene sheets with various degrees of oxidation are investigated as electrochemical pseudocapacitor materials for potential energy storage applications. Single-crystalline Ni(OH)(2) hexagonal nanoplates directly grown on lightly oxidized, electrically conducting graphene sheets (GS) exhibit a high specific capacitance of approximately 1335 F/g at a charge and discharge current density of 2.8 A/g and approximately 953 F/g at 45.7 A/g with excellent cycling ability. The high specific capacitance and remarkable rate capability are promising for applications in supercapacitors with both high energy and power densities. A simple physical mixture of pre-synthesized Ni(OH)(2) nanoplates and graphene sheets shows lower specific capacitance, highlighting the importance of direct growth of nanomaterials on graphene to impart intimate interactions and efficient charge transport between the active nanomaterials and the conducting graphene network. Single-crystalline Ni(OH)(2) nanoplates directly grown on graphene sheets also significantly outperform small Ni(OH)(2) nanoparticles grown on heavily oxidized, electrically insulating graphite oxide (GO), suggesting that the electrochemical performance of these composites is dependent on the quality of graphene substrates and the morphology and crystallinity of the nanomaterials grown on top. These results suggest the importance of rational design and synthesis of graphene-based nanocomposite materials for high-performance energy applications.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/76e3b6fa1342bf5d5ae409f92305e58300b17eec

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

1. Hongjie Dai
2. Hua Zhang
3. Xiaoming Sun
4. Hailiang Wang
5. G. Chen
6. Yongye Liang
7. Linpo Yu
8. Nam-Hoon Kim

In Electronic, Optical and Magnetic Materials

1. Hongjie Dai
2. G. Chen
3. Hua Zhang
4. Hailiang Wang
5. Linpo Yu
6. Yu Huang
7. J. Lee
8. Nam-Hoon Kim

In Materials Chemistry

1. Hua Zhang
2. Xiangfeng Duan
3. Hongjie Dai
4. Yu Huang
5. Hailiang Wang
6. J. Lee
7. Nam-Hoon Kim
8. Tapas Kuila

Citations in the corpus

• Advanced asymmetrical supercapacitors based on graphene hybrid materials (2011, background): “Recently we have synthesized hexagonal crystalline nanoplates of Ni(OH)2 on graphene sheets and demonstrated high specific capacitances at high rates with this hybrid material [22, 23].”