FacebookTwitterGoogle Bookmarks

Electrochimica Acta, January 2015

Observation of the structural changes of sol-gel formed Li2MnTi3O8during electrochemical reaction by in-situ and ex-situ studies

Intitulé de l'article

Observation of the structural changes of sol-gel formed Li2MnTi3O8during electrochemical reaction by in-situ and ex-situ studies

Revue Electrochimica Acta,Volume 152
Date de publication

10 January 2015

Auteurs

Wei Chen

Hanfeng Liang

Lianyi Shao

Jie Shu

Zhoucheng Wang

Abstract

In this work, spinel Li2MnTi3O8is successfully prepared by using a simple sol-gel route and evaluated as an anode material for lithium-ion batteries. Charge-discharge tests exhibits than spinel Li2MnTi3O8can deliver an initial discharge capacity of 273.5 mAh g−1and the reversible capacity is kept at 206.1 mAh g−1after 50 cycles, corresponding to 94.5% of the initial charge capacity. The electrochemical reaction mechanism between Li2MnTi3O8and lithium is investigated based on the results of various in-situ and ex-situ observations. The result indicates that the (Li0.505Mn0.495)tet(Li0.495Mn0.005)octTi1.5octO4has multiple interstitials to accommodate lithium ions during the lithiation process, in which the octahedral sites (4a) would be occupied by lithium ions at high working potential and the tetrahedral sites (8c) would be occupied by lithium ions at low working potential. As a result, two two-phase transitions between three end-number phases Li2MnTi3O8, Li3MnTi3O8and Li5MnTi3O8can be observed during the reversible electrochemical reaction between Li2MnTi3O8and lithium.

Consulter 

Lien direct

Cet article vous interesse? 

Abonnez-vous à la bibliothèque de l’IMIST qui dispose d’un fonds documentaire pluridisciplinaire accessible sur place. Pour plus d’informations vous pouvez vous renseigner auprès du service communication de l’IMIST.

contact

 

 

Calendrier

Novembre 2018
Lun Mar Mer Jeu Ven Sam Dim
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

Newsletter