Abstract
A potential 4 V cathode material for lithium batteries was investigated. The crystal chemistry of the olivine-type of (discharged state) and its delithiated form (charged state) were comparatively studied using X-ray diffraction, Mössbauer spectroscopy, and ab initio calculations. A strong oxidizer, nitronium tetrafluoroborate, was used for chemical delithiation of to obtain The strong electron/lattice interaction induced by the trivalent manganese in (charged state) is highlighted as the intrinsic obstacle to generating the full theoretical capacity (ca. 170 mAh/g) of the Mn-rich phase followed by an efficient cathode performance of the optimized © 2001 The Electrochemical Society. All rights reserved.
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