Li-storage in LiFe1/4Mn1/4Co1/4Ni1/4PO4 solid solution

Role of structural defects in olivine cathodes

“…Mn, Co, Ni are displayed in Fig. 3b [9,[27][28][29][30]. The decrease in capacity of LiFePO 4 upon increasing the doping concentration of cations is due to formation of defect cluster in the system while the cell voltage increased from 3.5 to 4.7 V. Thus the interstitial defect induces electrostatic interactions between the defect regions that lead to agglomerated defect clusters, which restrict the Li + mobility resulting in poor capacity retention [21].…”

Electrochemical investigations of Li2AuSn2

“…Although we were aware that expensive metals such as gold have to be replaced for battery applications, the unique structure and dynamics prompted us to carry out an electrochemical characterisation of this material as a prototype of a class of structures. The electrochemical techniques used in this work are well documented in the literature [32][33][34][35][36]. We concentrate here on techniques to …”

Synthesis and properties of Co-doped LiFePO4 as cathode material via a hydrothermal route for lithium-ion batteries

“…Cobalt [7,8], manganese [9], nickel [10], and vanadium [11] are considered favourable candidate dopants because of the higher chemical potential of Co 2+/3+ , Mn 2+/3+ , Ni 2+/3+ , and V 2+/3+ . To maximise the advantages of metal ion doping, multi-metal ion-doped compounds have also been prepared; these include LiFe 1/4 Mn 1/3 Co 1/3 PO 4 [12] prepared via solid-state measurement and LiFe 1/4 Mn 1/4 Co 1/4 Ni 1/4 PO 4 [13] prepared by solid-state synthesis. To date, however, few systematic studies on cobalt doping have been conducted compared with those on other transition metals.…”