Electrochemical and structural characteristics of metal oxide-coated lithium manganese oxide (spinel type)

Novel approach to preparation of LiMn2O4 core/LiNixMn2−xO4 shell composite

“…This severe capacity fading is mainly due to the Jahn-Teller distortion on the surface of spinel LiMn 2 O 4 [4][5][6], the dissolution of manganese in the electrolyte solution [7][8][9], the spinel LiMn 2 O 4 with oxygen deficiency [10,11] and the decomposition of electrolyte solution on the electrode [12]. In order to overcome capacity fading of spinel LiMn 2 O 4 , many strategies have been investigated, which mainly included the partial substitution of mono-, di-or trivalent cations for Mn 3+ [13][14][15] and coating the spinel LiMn 2 O 4 particles with organic or inorganic compounds [16][17][18].…”

Operando Observations and First‐Principles Calculations of Reduced Lithium Insertion in Au‐Coated LiMn2O4

“…Therefore, examining LMO with a bulk measurement, such as powder X‐ray diffraction (XRD), could provide valuable insight into the interactions between an electrode and its coating. Previously, ex situ and in situ XRD studies comparing coated and uncoated LMO observed increased peak broadening, formation of defect phases after extended cycling, and irreversible changes to the lattice parameter for the coated materials . This prior work, however, left unclear how conductive coatings influence LMO intercalation chemistry, which is directly related to the lattice parameter during charge and discharge.…”

The spinel phase LiMnTiO4 as a potential cathode for rechargeable lithium ion batteries

“…Several factors, such as the Jahn-Teller effect especially in deeply discharging, the dissolution of Mn 2? ions, and the structural instability of cathode materials [3][4][5][6], have been suggested to cause this fading. In order to solve these problems mentioned above, many works have been performed, including surface coating and element substitution [7][8][9][10]. For instance, the substitution of other metals for Mn results in the formation of LiM x Mn 2-x O 4 (M = Cr, Co, Ni, Al, etc.…”