A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode
A novel hybrid Li-ion capacitor (LIC) with high energy and power densities is constructed by combining an electrochemical double layer capacitor type cathode (graphene hydrogels) with a Li-ion battery type anode (TiO2 nanobelt arrays). The high power source is provided by the graphene hydrogel catho...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2015
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| Online Access: | https://hdl.handle.net/10356/107079 http://hdl.handle.net/10220/25379 http://dx.doi.org/10.1002/smll.201402620 |
| _version_ | 1826110617083183104 |
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| author | Wang, Huanwen Guan, Cao Wang, Xuefeng Fan, Hong Jin |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wang, Huanwen Guan, Cao Wang, Xuefeng Fan, Hong Jin |
| author_sort | Wang, Huanwen |
| collection | NTU |
| description | A novel hybrid Li-ion capacitor (LIC) with high energy and power densities is constructed by combining an electrochemical double layer capacitor type cathode (graphene hydrogels) with a Li-ion battery type anode (TiO2 nanobelt arrays). The high power source is provided by the graphene hydrogel cathode, which has a 3D porous network structure and high electrical conductivity, and the counter anode is made of free-standing TiO2 nanobelt arrays (NBA) grown directly on Ti foil without any ancillary materials. Such a subtle designed hybrid Li-ion capacitor allows rapid electron and ion transport in the non-aqueous electrolyte. Within a voltage range of 0.0−3.8 V, a high energy of 82 Wh kg−1 is achieved at a power density of 570 W kg−1. Even at an 8.4 s charge/discharge rate, an energy density as high as 21 Wh kg−1 can be retained. These results demonstrate that the TiO2 NBA//graphene hydrogel LIC exhibits higher energy density than supercapacitors and better power density than Li-ion batteries, which makes it a promising electrochemical power source. |
| first_indexed | 2024-10-01T02:37:24Z |
| format | Journal Article |
| id | ntu-10356/107079 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:37:24Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1070792019-12-06T22:24:16Z A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode Wang, Huanwen Guan, Cao Wang, Xuefeng Fan, Hong Jin School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry A novel hybrid Li-ion capacitor (LIC) with high energy and power densities is constructed by combining an electrochemical double layer capacitor type cathode (graphene hydrogels) with a Li-ion battery type anode (TiO2 nanobelt arrays). The high power source is provided by the graphene hydrogel cathode, which has a 3D porous network structure and high electrical conductivity, and the counter anode is made of free-standing TiO2 nanobelt arrays (NBA) grown directly on Ti foil without any ancillary materials. Such a subtle designed hybrid Li-ion capacitor allows rapid electron and ion transport in the non-aqueous electrolyte. Within a voltage range of 0.0−3.8 V, a high energy of 82 Wh kg−1 is achieved at a power density of 570 W kg−1. Even at an 8.4 s charge/discharge rate, an energy density as high as 21 Wh kg−1 can be retained. These results demonstrate that the TiO2 NBA//graphene hydrogel LIC exhibits higher energy density than supercapacitors and better power density than Li-ion batteries, which makes it a promising electrochemical power source. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2015-04-13T03:12:32Z 2019-12-06T22:24:16Z 2015-04-13T03:12:32Z 2019-12-06T22:24:16Z 2014 2014 Journal Article Wang, H., Guan, C., Wang, X., & Fan, H. J. (2015). A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode. Small, 11(12), 1470-1477. 1613-6810 https://hdl.handle.net/10356/107079 http://hdl.handle.net/10220/25379 http://dx.doi.org/10.1002/smll.201402620 en Small © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry Wang, Huanwen Guan, Cao Wang, Xuefeng Fan, Hong Jin A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title | A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title_full | A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title_fullStr | A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title_full_unstemmed | A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title_short | A high energy and power li-ion capacitor based on a TiO2 nanobelt array anode and a graphene hydrogel cathode |
| title_sort | high energy and power li ion capacitor based on a tio2 nanobelt array anode and a graphene hydrogel cathode |
| topic | DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry |
| url | https://hdl.handle.net/10356/107079 http://hdl.handle.net/10220/25379 http://dx.doi.org/10.1002/smll.201402620 |
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