CrIII-doped vanadate glass: characterization and application as a cathode active material for lithium-ion batteries
CrIII-doped vanadate glass: characterization and application as a cathode active material for lithium-ion batteries
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DOI：
10.1007/s10751-022-01812-3
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发表时间：
2022-12
影响因子：
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通讯作者：
Shunsuke Matsusako;Sayaka Masuda;Saeko Matsuo;R. Imamura;Takahisa Sakuragi;Honami Inada;Hikaru Hayakawa;T. Nishida;Nobuto Oka
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文献类型：
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作者：
Shunsuke Matsusako;Sayaka Masuda;Saeko Matsuo;R. Imamura;Takahisa Sakuragi;Honami Inada;Hikaru Hayakawa;T. Nishida;Nobuto Oka
采用熔融急冷法制备了含CrIII的锂铁磷钒酸盐玻璃，并将其用作锂离子电池正极活性材料。制备了15 Li 2 O·10 Fe 2 O3·5 P2 O 5·xCr 2 O3·（70-x）V2 O 5和15 Li 2 O·（10-x）Fe 2 O3·5 P2 O 5·xCr 2 O3·70 V2 O 5非晶玻璃结构，其中x从0变化到5。在500 °C下退火90 min制备了微晶玻璃样品，在室温下测量了退火前后的15 Li 2 O <$10Fe2O3 <$5P2O5 <$70V2O5玻璃的57 Fe-Mössbauer谱，证明部分铁（III）原子改变了结构角色，从畸变的“八面体”NWM位变为畸变的“四面体”NWF位。在4.2 V至2.0 V的放电过程中，实现了250-300 mA·h− 1的高容量。用CrIII替代V显示出对玻璃材料的电化学性能具有相当大的积极影响。
Lithium iron phosphovanadate glasses containing CrIIIwere obtained by the melt-quench method and applied as cathode active materials in lithium-ion batteries. Amorphous glass structures were produced with compositions of 15Li2O·10Fe2O3·5P2O5·xCr2O3·(70-x)V2O5and 15Li2O·(10-x)Fe2O3·5P2O5·xCr2O3·70V2O5, wherexvaried from 0 to 5. Glass ceramic samples were prepared by annealing at 500 °C for 90 min.57Fe-Mössbauer spectra of 15Li2O‧10Fe2O3‧5P2O5‧70V2O5glass measured at room temperature before and after the annealing proved that some iron (III) atoms changed the structural role from distorted “octahedral” NWM sites to distorted “tetrahedral” NWF sites. High capacities of 250–300 mA‧h− 1were achieved during discharge from 4.2 to 2.0 V. The substitution of V with CrIIIwas shown to have a considerable positive effect on the electrochemical performance of the glass material.