Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
194197 | Electrochimica Acta | 2008 | 6 Pages |
Abstract
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, [Ni4Al(OH)10]OH and [Ni4Al(OH)10]NO3, 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 [Ni4Al(OH)10]OH than in [Ni4Al(OH)10]NO3 and the morphologic changes induced by anion exchange of NO3− by OH− during electrochemical cycles play key roles in their behaviour.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Lixu Lei, Meng Hu, Xiaorui Gao, Yueming Sun,