February 21, 2014
VIP: Three-Dimensional Structural Engineering for Energy-Storage Devices: From Microscope to Macroscope
Jing Xu, Xianfu Wang, Xiaowei Wang, Di Chen,* Xiaoyuan Chen, Dongdong Li* and Guozhen Shen*
As typical energy-storage devices (ESDs), supercapacitors and Li-ion batteries have attained great research attention for their excellent electrochemical energy-storage performance and low cost. This article aims to review the recent achievements in these ESDs from three aspects: 3D active materials, 3D current collectors, and 3D device integrations, along the line of microscope to macroscope. The structural engineering in each section is categorized and summarized based on the results in the literature, shedding light on the importance of advanced architecture. In addition, some possible research trends about ESD configurations and an optimistic outlook are also proposed.
Recently Published Articles
- Logic Functions with Stimuli-Responsive Single Nanopores
Prof. Dr. Patricio Ramirez, Dr. Javier Cervera, Dr. Mubarak Ali, Prof. Dr. Wolfgang Ensinger and Prof. Dr. Salvador Mafe
Article first published online: 7 MAR 2014 | DOI: 10.1002/celc.201300255
Porefection: Electrochemical transducers based on single stimuli-responsive polymeric nanopores can support a complete set of logic functions. Thermal, chemical, electrical, and optical stimuli are the input signals required to externally tune the pore conductance (i.e. the logical output).
- Aluminum-Doped Hafnium Oxynitride: Effect of Cation Doping on Oxygen-Reduction-Reaction Activity in Acid Media
Dr. Mitsuharu Chisaka and Hirokazu Muramoto
Article first published online: 5 MAR 2014 | DOI: 10.1002/celc.201300271
Defect incorporation: Tetravalent Hf sites in a HfOx catalyst are successfully substituted by trivalent Al atoms to incorporate oxygen defects, which are supposedly active for the oxygen reduction reaction without a decrease in the Hf valence.
- In Situ Study of Ethanol Electrooxidation on Monodispersed Pt3Sn Nanoparticles
Dr. Tirma Herranz, Dr. María Ibáñez, Dr. José L. Gómez de la Fuente, Dr. Francisco J. Pérez-Alonso, Dr. Miguel A. Peña, Dr. Andreu Cabot and Dr. Sergio Rojas
Article first published online: 3 MAR 2014 | DOI: 10.1002/celc.201300254
Oxidation or scission, that is the question: Pt3Sn nanosized particles are rather active for the electrooxidation of ethanol in acid medium to produce more acetic acid and acetaldehyde than on Pt. However, the production of CO2 and other C1 species is less than that on Pt. The more facile formation of adsorbed OH species on Pt3Sn, although vital for the oxidation of intermediates such as adsorbed CO, prevents scission of the CC bond.
- A Simple Non-Gassing, Direct Current, Electro-Osmotic Pump: Carbon Paper/Ceramic Frit/Carbon Paper
Dr. Rajaram K. Nagarale and Prof. Adam Heller
Article first published online: 3 MAR 2014 | DOI: 10.1002/celc.201400023
Pump it up: Small, non-gassing, low-voltage, direct-current, electro-osmotic pumps with plasma-treated carbon electrodes are reported. The pumps provide sufficient flow for the delivery of drugs. Flow persists for 18 h at a rate of 10 μL cm−2 min−1 at an applied potential of 1 V.
- Iron–Nitrogen Coordination in Modified Graphene Catalyzes a Four-Electron-Transfer Oxygen Reduction Reaction
Dr. Kazuhide Kamiya, Hiroyuki Koshikawa, Hisao Kiuchi, Prof. Yoshihisa Harada, Prof. Masaharu Oshima, Prof. Kazuhito Hashimoto and Prof. Shuji Nakanishi
Article first published online: 26 FEB 2014 | DOI: 10.1002/celc.201300181
Transfer lounge: iron–nitrogen (Fe/N)-modified graphene is synthesized through short-duration heat treatment and possesses both the complete sp2 graphitic structure and a high density of Fe/N coordination structures. The Fe/N-modified graphene exhibits a higher number of electrons for oxygen reduction reactions than equivalent catalysts that have been subjected to long periods of heat treatment.