P-redox mechanism at the origin of the high lithium storage in NiP2-based batteries
BOYANOV, Simeon
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
BERNARDI, J.
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
See more >
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
BOYANOV, Simeon
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
BERNARDI, J.
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
DOUBLET, Marie-Liesse
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
MONCONDUIT, Laure
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
< Reduce
Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM ICMMM]
Language
en
Article de revue
This item was published in
Chemistry of Materials. 2009, vol. 21, n° 2, p. 298-308
American Chemical Society
English Abstract
The Li reactivity of NiP<sub>2</sub> is investigated by means of electrochemical tests, in situ XRD, and <sup>31</sup>P NMR characterizations as well as first principles DFT calculations. A two-step insertion/conversion ...Read more >
The Li reactivity of NiP<sub>2</sub> is investigated by means of electrochemical tests, in situ XRD, and <sup>31</sup>P NMR characterizations as well as first principles DFT calculations. A two-step insertion/conversion reaction is shown to transform the NiP<sub>2</sub> starting electrode into an intermediate Li<sub>2</sub>NiP<sub>2</sub> single phase and then to convert into the Li<sub>3</sub>P/Ni° nanocomposite. The ternary phase is fully characterized and is shown to be structurally very close to the starting NiP<sub>2</sub> regarding the Ni ions environment. This demonstrates that its formation results from a P-redox insertion mechanism associated with a very good reversibility. However, its nucleation upon delithiation from the fully converted Li<sub>3</sub>P/Ni composite is shown to be kinetically limited (poor structural relationship) which strongly suggests that restricted lithiation is required for best cycleability of the NiP<sub>2</sub>/Li cell.Read less <
English Keywords
Lithium
Reactivity
NiP<sub>2</sub>
Electrochemistry
XRD
<sup>31</sup> P Nuclear magnetic resonance
DFT
Origin
Hal imported