Achieving high mass loading of Na3V2(PO4)3@carbon on carbon cloth by constructing three-dimensional network between carbon fibers for ultralong cycle-life and ultrahigh rate sodium-ion batteries
- Authors
- Guo, Donglei; Qin, Jinwen; Yin, Zhigang; Bai, Jinman; Sun, Yang-Kook; Cao, Minhua
- Issue Date
- Mar-2018
- Publisher
- ELSEVIER
- Keywords
- Na3V2(PO4)(3); Carbon cloth; Three-dimensional network; Mass loading; Sodium-ion batteries
- Citation
- NANO ENERGY, v.45, pp.136 - 147
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO ENERGY
- Volume
- 45
- Start Page
- 136
- End Page
- 147
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4724
- DOI
- 10.1016/j.nanoen.2017.12.038
- ISSN
- 2211-2855
- Abstract
- The mass loading of the active materials in most flexible electrodes is relatively low, which greatly impedes their practical application. Here, we report a facile strategy to achieve high mass loading of Na3V2(PO4)3@carbon (NVP@C) supported on carbon cloth (NVP@C-CC) by a two-step coating followed by an annealing treatment and the resultant NVP@C-CC membrane can be used as a binder-free cathode for sodium ion batteries (SIBs). The NVP@C is not only uniformly anchored on the surface of carbon fibers of CC, but also filled between carbon fibers of CC in interconnected three-dimensional (3D) macroporous structure. It is because of the full use of the spaces between carbon fibers of CC that we achieve a high NVP@C mass loading. Thus-obtained NVP@C-CC exhibits excellent cyclability (82.0% capacity retention over 2000 cycles at 20 C) and high rate capacity (96.8 mA h g−1 at 100 C and 69.9 mA h g−1 at 200 C) for sodium half cells and meanwhile the high mass loading of NVP@C on CC also endows the cell with fairly high energy and powder densities of 396 W h kg−1 and 97 kW kg−1. Furthermore, it also presents superior cycling stability and rate performance when evaluated as full battery (NaTi2(PO4)3@C as the anode) cathode. This study offers a new strategy for achieving high mass loading of the active materials on flexible supports in flexible energy storage devices.
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