Curved Fragmented Graphenic Hierarchical Architectures for Extraordinary Charging Capacities |
| |
| Authors: | Hong‐Yuan Lian Saikat Dutta Satoshi Tominaka Yu‐An Lee Shu‐Yun Huang Yasuhiro Sakamoto Chia‐Hung Hou Wei‐Ren Liu Joel Henzie Yusuke Yamauchi Kevin C‐W Wu |
| |
| Affiliation: | 1. Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan;2. International Center for Materials Nanoarchitectonics (WPI‐MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan;3. Department of Chemical Engineering, Chung Yuan Christian University, Chung‐Li, Taiwan;4. Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan;5. Polymer Physics and Chemistry, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan;6. Department of Plant and Environmental New Resources, Kyung Hee University, Gyeonggi‐do, South Korea;7. School of Chemical Engineering & Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland, Brisbane, QLD, Australia;8. Center of Atomic Initiative for New Materials (AI‐MAT), National Taiwan University, Taipei, Taiwan;9. International Graduate Program of Molecular Science and Technology, National Taiwan University (NTU‐MST), Taipei, Taiwan |
| |
| Abstract: | An approach to assemble hierarchically ordered 3D arrangements of curved graphenic nanofragments for energy storage devices is described. Assembling them into well‐defined interconnected macroporous networks, followed by removal of the template, results in spherical macroporous, mesoporous, and microporous carbon microball (3MCM) architectures with controllable features spanning nanometer to micrometer length scales. These structures are ideal porous electrodes and can serve as lithium‐ion battery (LIB) anodes as well as capacitive deionization (CDI) devices. The LIBs exhibit high reversible capacity (up to 1335 mAh g?1), with great rate capability (248 mAh g?1 at 20 C) and a long cycle life (60 cycles). For CDI, the curved graphenic networks have superior electrosorption capacity (i.e., 5.17 mg g?1 in 0.5 × 10?3m NaCl) over conventional carbon materials. The performance of these materials is attributed to the hierarchical structure of the graphenic electrode, which enables faster ion diffusion and low transport resistance. |
| |
| Keywords: | capacitive deionization charging capacity curved graphene porous carbon X‐ray pair distribution |
|
|
