Enhancement of battery performance of LiMn2O4: correlations between electrochemical and magnetic properties
Küçük Resim Yok
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Royal Soc Chemistry
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
We report the results of a systematic investigation of structural, electrical transport, magnetic, and electrochemical properties of LiBxMn2-xO4 (where x = 0.0-1), synthesized via a one-step solid state reaction technique. We find that the parent compound (x = 0) has the non-stoichiometric Li1.05Mn2O4 phase and the B ions successfully incorporate the structure for x <= 0.5. The resistivity anomaly of the parent compound below 100 K is attributed to the antiferromagnetic correlations. The linear part of the chi(-1)-T data are used to calculate the effective magnetic moments and to determine the total number of Mn3+ and Mn4+ ions. Magnetization measurements show that Jahn-Teller active Mn3+ ions have high spin configuration. Average valance of Mn ions increases with increasing boron content. Electrochemical studies show improved capacity retention for x = 0.125 for 100 charge-discharge cycles. This improvement is attributed to subtle modifications in the structural and magnetic properties upon substitution.
Açıklama
Anahtar Kelimeler
Li-Ion Batteries, Elevated-Temperature Performance, Teller Cooperative Distortion, Lithium Manganese Oxide, Doped Limn2o4, Electrode Materials, Spinel Materials, Cathode Material, Transport-Properties, Phase-Transition
Kaynak
Rsc Advances
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
6
Sayı
49
