Structure and effect of diamagnetism on manganese lithium phosphate glass to cathode materials application

1-x(Li2O-2P(2)O(5))-xMnO(2) glasses where x = 0.2, 0.3 and 0.4 mol%, respectively, were synthesized by melted-quenching method. The Mn and P oxidation states and local structures around Mn and P-ions including Mn-O and P-O bonding distances and coordination numbers have been studied via X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), respectively. XANES results exhibit a coexistence of oxidation state of Mn2+ and Mn3+ with a mean value of 2.82. Moreover, Mn and P K-edge EXAFS show the Mn-O and P-O bonding distances of approximately 2.083-2.094 angstrom and 1.766-1.774 angstrom, respectively. A paramagnetism was found for all Mn-P glasses. Additionally, the coercive field (H-c) and remnant magnetization (M-r) increased with increasing Mn contents. However, the low specific capacitances are seriously obtained (<40 F g(-1)) suggesting the effect of natural diamagnetism of lithium phosphate based-glass unlike the borate based-glasses which originally exhibit paramagnetism.