Journal
ELECTROCHIMICA ACTA
Volume 54, Issue 2, Pages 671-676Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.07.004
Keywords
Layered double hydroxide; Nickel hydroxide; Secondary battery; Energy density; Power density; Fast ion transport
Categories
Funding
- Office of Science and Technology [BA2006044]
- Office of Personnel, Jiangsu Province
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- State Education Ministry
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Both high energy density and high power density are vitally required for new applications such as electric vehicles. Here we present a comparison of two well-crystallised layered double hydroxides, [Ni(4)Al(OH)(10)]OH and [Ni(4)Al(OH)(10)]NO(3), which shows that the former can maintain a better discharge capacity, 294-299 mAh g(-1), than the latter, 233-287 mAh g(-1) at a current density of 2000 mA g(-1) within about 300 cycles, although both electrodes deliver a similar capacity of 326 mAh g(-1) at 200 mA g(-1) initially. It is believed that both the more watery interlayer space in [Ni(4)Al(OH)(10)]OH than in [Ni(4)Al(OH)10]NO(3) and the morphologic changes induced by anion exchange of NO(3)(-) by OH(-) during electrochemical cycles play key roles in their behaviour. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
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