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Structure and effect of diamagnetism on manganese lithium phosphate glass to cathode materials application
Progress in Natural Science: Materials International ( IF 4.8 ) Pub Date : 2021-05-02 , DOI: 10.1016/j.pnsc.2021.03.004
Pichitchai Butnoi , Wipada Senanon , Narong Chanlek , Yingyot Poo-arporn , Supree Pinitsoontorn , Santi Maensiri , Prayoon Songsiriritthigul , Pongtanawat Khemthong , Pinit Kidkhunthod

1-x(Li2O–2P2O5)-xMnO2 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 ​Å and 1.766–1.774 ​Å, respectively. A paramagnetism was found for all Mn–P glasses. Additionally, the coercive field (Hc) and remnant magnetization (Mr) 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.



中文翻译:

抗磁性对磷酸锰锂玻璃阴极材料应用的结构和影响

1- x (Li 2 O–2P 2 O 5 )- x MnO 2玻璃,其中 x = 0.2、0.3 和 0.4 mol%,分别是通过熔融淬火法合成的。通过 X 射线吸收近边结构 (XANES) 和扩展 X 射线吸收精细结构研究了 Mn 和 P 氧化态和 Mn 和 P 离子周围的局部结构,包括 Mn-O 和 P-O 键合距离和配位数(EXAFS),分别。XANES 结果显示 Mn 2+和 Mn 3+的氧化态共存,平均值为 2.82。此外,Mn 和 P K-edge EXAFS 显示 Mn-O 和 P-O 键合距离分别约为 2.083-2.094 Å 和 1.766-1.774 Å。发现所有 Mn-P 玻璃都具有顺磁性。另外,矫顽场(ħ Ç)和剩余磁化(中号[R )随Mn含量增加。然而,严重获得了低比电容(<40 F g -1),这表明磷酸锂基玻璃的自然抗磁性作用与最初表现出顺磁性的硼酸盐基玻璃不同。

更新日期:2021-07-01
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