Nanoporous NiO/Ni(OH)2 plates incorporated with carbon nanotubes as active materials of rechargeable hybrid zinc batteries for improved energy efficiency and high-rate capability
|dc.identifier.citation||Tan, P. and Chen, B. and Xu, H. and Cai, W. and Liu, M. and Shao, Z. and Ni, M. 2018. Nanoporous NiO/Ni(OH)2 plates incorporated with carbon nanotubes as active materials of rechargeable hybrid zinc batteries for improved energy efficiency and high-rate capability. Journal of the Electrochemical Society. 165 (10): pp. A2119-A2126.|
© 2018 The Electrochemical Society. Although rechargeable zinc-air batteries are one of the promising power sources, the commercialization is hindered by a variety of technical hurdles, especially the low energy efficiency and poor rate capability due to the low discharge voltage. Herein, we report a high-performance composite composed of nanoporous NiO/Ni(OH)2 plates incorporated with carbon nanotubes. When used as the active material, unlike any single types of zinc-based batteries, the electrochemical reactions in both nickel-zinc and zinc-air batteries are combined. A high voltage of 1.7 V is obtained in the nickel-zinc battery region and a high capacity of over 800 mAh gZn-1 is demonstrated in the zinc-air battery region, attributed to the high pseudocapacitance and excellent activities of NiO/Ni(OH)2 nanoporous plates and the high electrical conductivity of carbon nanotubes. In addition, the battery can be cycled steadily for over 192 times at 5 mA cm-2 while maintaining the capacity at the energy efficiency of higher than 60%. Moreover, the discharge voltage profile and obtainable capacity remain unchanged even when the charge current density is increased by 8 times (from 2 to 16 mA cm-2), demonstrating excellent high-rate charge capability. The results shed light on further explorations of active materials for high-performance rechargeable hybrid batteries.
|dc.publisher||The Electrochemical Society, Inc|
|dc.title||Nanoporous NiO/Ni(OH)2 plates incorporated with carbon nanotubes as active materials of rechargeable hybrid zinc batteries for improved energy efficiency and high-rate capability|
|dcterms.source.title||Journal of the Electrochemical Society|
|curtin.department||WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)|
|curtin.accessStatus||Fulltext not available|